Chemistry College
Answers
Answer 1
A chemical change is said to occur when there is the appearance of a new substance after the reaction.
What is happening?
We know that a chemical change is said to occur when there is the appearance of a new substance after the reaction. This can be signaled by the appearance of a solid or gas as well as a change in color.
Now what has happened here is a chemical reaction that took place as follows;
2Mg(s) + O2(g) ------> 2MgO(s)
The burning of magnesium gives off a silvery white emission spectrum. The reaction that occurs is a combustion reaction and a new substance, MgO was formed.
Learn more about chemical change:https://brainly.com/question/23693316
#SPJ1
Related Questions
Identify each of the pieces of laboratory equipment. Match the correct letter to the appropriate equipment.
Iron Ring
Scoopula/Spatula
Tongs
Hot Plate
Funnel
Water Bottle
Test Tube
Wire Gauze
Themometer
Test Tube Rack
Pipettes
Graduate Cylinders
Bunsen lab Burner
Watch Glass
Test Tube Holder
Beaker
Goggles
Evaporating Dish
Erlenmeyer Flask
Eye dropper
Ring Stand
Untility clamp
Note: if right answer I'll give a additional 500 point
Answers
Answer:
A.) Beaker
B.) Watch Glass
C.) Wire Gauze
D.) Iron Ring
E.) Funnel
F.) Test Tube
G.) Eye Dropper
H.) Pipettes
I.) Tongs
J.) Thermometer
K.) Graduated Cylinder
L.) Ring Stand
M.) Bunsen Lab Burner
N.) Test Tube Holder
O.) Utility Clamp
P.) Water Bottle
Q.) Goggles
R.) Test Tube Rack
S.) Erlenmeyer Flask
T.) Evaporating Dish
U.) Hot Plate
V.) Scoopula/Spatula
At standard temperature and pressure, krypton has a density of 0.003749 g/mL. A sample of krypton has a mass of
3.09 g. What is the volume of the krypton?
Answers
The volume of krypton is 2824.213 ml
What is Volume?
Volume can be defined as a measure of occupied space of a closed container.
In the given question, the volume is gotten by dividing the mass by the density.
parameters given
Density=0.003749g/ml
mass= 3.09g
Volume= mass/density
volume=3.09/0.003749
volume= 2824.213 ml
In conclusion, volume of can be gotten by dividing mass by density.
Learn more about volume at:https://brainly.com/question/1789840
#SPJ1
mole is equal to 6.022x1023 particles/atoms/molecules. how many chloride ions are presented when 1 mole of sodium chloride is mixed with 4 mole of magnesium chloride
Answers
When 1 mole of sodium chloride is mixed with 4 mole of magnesium chloride, the number of chloride ion present will be 5.4198 x [tex]10^{24}[/tex] molecules
Number of molecules in substances
1 mole of sodium chloride contains 1 mole of chloride ion according to the following equation:
NaCl ---> [tex]Na^+[/tex] + [tex]Cl^-[/tex]
4 moles of magnesium chloride will contain moles of chloride ions according to the following equation:
[tex]4MgCl_2 --- > 4Mg^{2+} + 8 Cl^-[/tex]
The total number of moles of chloride ions in solution:
1+8 = 9 moles.
1 mole of a substance = 6.022 x [tex]10^{23}[/tex]
Thus, the total number of chloride ions present in the mixture = 9 x 6.022 x [tex]10^{23}[/tex]
= 5.4198 x [tex]10^{24}[/tex] molecules
More on number of molecules in substances can be found here: https://brainly.com/question/11907018
#SPJ1
The elements that nucleotides are made of (Carbon, Hydrogen, Oxygen, Nitrogen) are on earth in fixed amounts. You cannot create or destroy atoms of these elements. When your body needs to copy DNA activities such as cell division, where does it get the building blocks (nucleotides) for making copies of DNA?
Answers
The building blocks of DNA (the nucleotides) are gotten from inside the nucleus of cells during replication.
What is replication?
Replication is a biological process during which copies of DNA are made in the cells of living organisms.
Double helix DNAs are first unwound and each strand forms a template for the replication of a daughter strand. Complementary nucleotide bases are added to the growing daughter strands until replication is complete.
Nucleotide bases lie freely within the nucleus of living organisms and come in handy during the replication process.
More on replication can be found here: https://brainly.com/question/16464230
#SPJ1
Which statement best describes what happens when thermal energy of the
air around a fire is transferred to the surrounding air?
O A. The thermal energy is spread out by the surrounding air.
OB. The thermal energy is destroyed over time.
OC. The thermal energy changes to chemical energy.
O D. The thermal energy is destroyed as it changes to chemical energy.
Answers
When the thermal energy of the air around a fire is transferred to the surrounding air A. The thermal energy is spread out by the surrounding air.
Thermal energy transfers occur in 3 approaches conduction, convection, and radiation. whilst thermal power is transferred among neighboring molecules that are in touch with each other, which is referred to as conduction.
Thermal strength refers to the power contained inside a system that is liable for its temperature. heat is the go with the flow of thermal electricity. an entire department of physics, thermodynamics, offers how heat is transferred among exceptional systems and how work is accomplished in the manner.
Thermal strength also referred to as heat strength is produced when a rise in temperature reasons atoms and molecules to transport quicker and collide with each other. The energy that comes from the temperature of the heated substance is referred to as thermal strength.
Learn more about Thermal energy here:-https://brainly.com/question/19666326
#SPJ9
Be sure to answer all parts.
A small hole in the wing of a space shuttle requires a 16.1 cm² patch.
(a) What is the patch's area in square kilometers (km²)? Enter your answer in scientific notation.
x 10
km²
(b) If the patching material costs NASA $2.94/in², what is the cost of the patch to the nearest cent?
Answers
A. The patch's area in square kilometers (km²) is 1.61×10⁻⁹ km²
B. The cost of the patch to the nearest cent is 734 cents
A. How to convert 16.1 cm² to square kilometers (km²)
We can convert 16.1 cm² to km² as illustrated below:
Conversion scale
1 cm² = 1×10⁻¹⁰ km²
Therefore,
16.1 cm² = 16.1 × 1×10⁻¹⁰
16.1 cm² = 1.61×10⁻⁹ km²
Thus, 16.1 cm² is equivalent to 1.61×10⁻⁹ km²
B. How to determine the cost in cent
We'll begin by converting 16.1 cm² to in². This can be obtained as illustrated below:
1 cm² = 0.155 in²
Therefore,
16.1 cm² = 16.1 × 0.155
16.1 cm² = 2.4955 in²
Finally, we shall the determine the cost in centas fo r llow:
Cost per in² = $2.94 = 294 centCost of 2.4955 in² =?
1 in² = 294 cent
Therefore,
2.4955 in² = 2.4955 × 294
2.4955 in² = 734 cents
Thus, the cost of the patch is 734 cents
Learn more about conversion:
https://brainly.com/question/2139943
#SPJ1
Bilbo's shire property is 108,540 m², how large
is his property in acres?
Answers
When we convert Bilbo's shire property (i.e 108540 m²) to acres, the result obtained is 26.82 acres
Data obtained from the question
From the question given above, the following data were obtained:
Bilbo's shire property (in m²) = 108540 m²Bilbo's shire property (acres) = ?
How to convert 108540 m² to acres
We can convert 108540 m² to acres by doing the following
Conversion scale
4047 m² = 1 acre
Therefore
108540 m² = 108540 / 4047
108540 m² = 26.82 acres
Thus, 108540 m² is equivalent to 26.82 acres
Therefore, we can conclude that Bilbo's shire property in acres is 26.82 acres
Learn more about conversion:
https://brainly.com/question/11781786
#SPJ1
Please help I will give brainiest‼️‼️‼️‼️‼️‼️‼️
Answers
The scientific method is the method used for scientific discovery.
What is the scientific method?
The scientific method is the process or procedure which scientists follow in their discovery and explanation of natural phenomena.
The scientific method is as follows:
Observations/QuestionsHypothesisExperimentsResultsConclusions
Using the scientific method to determine if water is needed by plants to grow
Question: Is water needed for growth in plants?
Hypothesis: Plants need water
Independent variable: sunlight
Dependent variable: rate of evolution oxygen
Constant variable: sunlight and soil
Materials: Cupboard, soil, potted plant, water,
Procedure: One potted potted plant is watered, while the other is not watered. The length of the plant is measured after 10 days
Observation: The watered plant survived and grew while that which was not watered did not grow but died.
Conclusion: water is needed for growth in plants.
In conclusion, the scientific method can be used to determine if plants need water for growth.
Learn more about scientific method at: https://brainly.com/question/17274244
#SPJ1
7. Which is a challenge to food safety in an operation? The lack of certified training programs b. The growing elderly population in the U.S. C. The infrequency of health inspections in an operation d. The increased focus on personal hygiene in the operation
Answers
A challenge to food safety in an operation is the growing elderly population in the U.S. (Option B).
What is food safety?
The term food safety makes reference to strategies of a government aimed at giving the best nutrition possible to the population, which depends on its demographic features.
In conclusion, a challenge to food safety in an operation is the growing elderly population in the U.S. (Option B).
Learn more about food safety here:
https://brainly.com/question/22594033
#SPJ1
What is a non-example of a pistil
Answers
The non-example of a pistil is anther.
What is a pistil ?
The portion of a flower that produces ovules is called pistil . The ovary frequently supports a lengthy style that is capped with a stigma. The mature ovary is a fruit, and the mature ovule is a seed. The stigma is the area of the pistil where pollen develops. The expanded basal area of the pistil where ovules are formed is the ovary.
What is a anther ?
The stamen is the name for a flower's male reproductive organ. It is made up of a filament, which is a long tube with a pollen-producing structure on the end. The anther is the name of this oval-shaped component. It is essential for blooming plants to reproduce because it creates pollen, a male gametophyte.
Thus from above conclusion we can say that the non-example of a pistil is anther.
Learn more about the Anther here:
https://brainly.com/question/1658674
#SPJ9
What are a group of organ that work together called
Answers
Answer:
when there is a group of organs that work together they are called the organ system
Explanation:
I need help with the first one please!
Answers
Explanation:
...........................
.......
What elements are in the unknown sample? Select 2 options.
boron
lithium
hydrogen
potassium
Answers
The elements are in the unknown sample of emission spectrums is lithium and potassium.
What are the elements?
When light is emitted through a chemical material, it is known as an emission spectrum. An emission spectrum is a development of many types of lines in a variety of colors and wavelengths.
The red line emits light with the longest wavelength, which may be easily measured using a spectrophotometer when light passes through it.
Lithium and potassium are hence elements in the unidentified emission spectrum sample. B and E are the proper answers.
Learn more about emission spectrum, here:
brainly.com/question/12472637
#SPJ1
Missing parts:
The emission spectrums are known for the elements below. Line spectra for boron, lithium, hydrogen, helium, potassium and unknown sample. Boron has 3 purple lines, 1 blue line, 2 blue-green lines and 2 orange lines. Lithium has 2 purple lines, 2 blue lines, 2 blue-green lines, 1 orange line and 1 red line. hydrogen has one line of each purple, blue, blue-green and red. helium has 3 purple lines, 3 blue lines, 3 blue-green lines 1 yellow line and 2 red lines. Potassium has 8 purple lines, 6 blue-green lines, 10 green lines, 3 yellow lines, 2 orange lines and 6 red lines. The unknown sample has Potassium has 8 purple lines, 6 blue-green lines, 10 green lines, 3 yellow lines, 2 orange lines and 6 red lines. What elements are in the unknown sample? Check all that apply. boron lithium hydrogen helium potassium
1.____ unknown 1. a. syrup
2.____ unknown 2. b. ethanol
3.____ unknown 3. c. methanol
4.____ unknown 4. d. glycerin
Answers
1.c. methanol unknown
2.d. glycerin unknown
3. b. ethanol unknown
4. a. syrup unknown
How to calculate concentration in mL?
The molarity (M) is the relationship between the solute matter (n1) and the volume of a solution (V), that is, M = n1/V. Since the matter of solute is given in mol and the volume is given in liters, the unit of measurement for molarity is mol/L.
1.c. methanol unknown 1. 2.d. glycerin unknown 2. 3. b. ethanol unknown 3. 4. a. syrup unknown 4.
With this information, we can conclude that Molarity, molar concentration, concentration in mol/L or concentration in amount of matter is the ratio of the amount of matter in the solute to the volume of solution, expressed in the unit mol/L. Molarity can also be expressed in mol/dm³. The solution is formed by the solute and the solvent.
Learn more about Molarity in brainly.com/question/8732513
#SPJ1
One gallon of gasoline in an automobile's engine produces an average of 9.5 kg of carbon dioxide, which is a greenhouse gas; that is, it promotes the warming of Earth's atmosphere. Calculate the annual production of carbon dioxide in kg if there are 40 million cars in the United States and each car covers a distance of 5000 miles at a consumption rate of 20 miles per gallon.
Mark all of the equalities (or conversion factors) that are given in the paragraph above.
- 1 gallon gasoline = 9.5 kg carbon dioxide
- 1 car = 5000 miles
- 1 gallon gasoline = 20 miles
- 40 million cars = 5000 miles
Answers
The annual production of carbon dioxide will be 95 x [tex]10^1^0[/tex] kg
Mathematical operation
1 gallon gasoline = 9.5 kg carbon dioxide
1 car = 5000 miles
1-gallon gasoline = 20 miles
40 million cars = 5000 miles
If 1 car covers a distance of 5000 miles, the mileage of 40 million cars will be:
40,000,000 x 5000 = 200,000,000,000 miles.
For every 20 miles, 1 gallon of gasoline is consumed. The total gasoline consumed by the 40 million cars will be:
200,000,000,000/20 = 10,000,000,000 gallons
1 gallon of gasoline gives off 9.5 kg of carbon dioxide.
The total amount of carbon dioxide produced by the 40 million cars will be:
9.5 x 10,000,000,000 = 95 x [tex]10^1^0[/tex] kg
More on carbon dioxide can be found here: https://brainly.com/question/3049557
#SPJ1
Saline solutions, NaCl (aq), are often used in medicine. What is weight percent of NaCl in solution of 4.6 g of NaCl in 500g of water?
Answers
Answer:
0.92% NaCl
Explanation:
To find the weight percent (aka. mass percent), you need to use the following equation:
mass of solute (g)
Mass Percent = --------------------------------- x 100%
mass of solvent (g)
In this case, NaCl is the solute and water is the solvent. You can plug the given values into the equation and solve for the mass percent.
4.6 g NaCl
Mass Percent = ------------------------ x 100%
500 g H₂O
Mass Percent = 0.0092 x 100%
Mass Percent = 0.92%
Saline solutions, NaCl (aq), are often used in medicine, weight percent of NaCl in solution of 4.6 g of NaCl in 500g of water is 0.92 %
What is saline solution ?
Water and sodium chloride are combined to make saline. It can be used in medicine for a variety of purposes, including as cleaning wounds, removing and storing contact lenses, and treating dry eyes.
It is used intravenously to treat dehydration, including that caused by gastroenteritis and diabetic ketoacidosis.
Mass % = mass of solute in gram ÷ mass of solvent in gram × 100
NaCl is the solute in this scenario, while water is the solvent. You may solve for the mass % using the above data as inputs into the equation.
Mass % = 4.6 g of NaCl ÷ 500g of water × 100
= 0.0092 × 100 %
= 0.92 %
Thus, the weight percent of NaCl in solution of 4.6 g of NaCl in 500g of water is 0.92 %.
To learn more about saline solution follow the link;
https://brainly.com/question/20366557
#SPJ2
To determine the pH of a solution using a pH
indicator paper, you need a
Answers
We need a color key to determine the pH of a solution using pH indicator paper.
What is pH?
pH is the measure of the hydrogen ions concentration in a solution which means the measure of acidity or alkalinity of the solution.
Generally, the pH scale ranges from 0 to 14.
A solution having a pH less than 7 is said to be acidic whereas a solution having a pH more than 7 is considered basic or alkaline
A solution having a pH equal to 7 is said to be neutral
What are pH indicators?
pH indicators are weak acids that are found as natural dyes and that change color to show how many H⁺ (H3O⁺) ions are present in a solution.
The substance you are analyzing has an acidic, basic, or neutral pH value, which is calculated from the negative logarithm of H⁺ concentration.
The paper form of pH indicators is typically dipped into solutions and then removed for comparison against a color/pH key. Usually, the liquid form of pH indicators is added directly to solutions.
Thus, a color key or pH key is needed to determine the pH of a solution using pH indicator paper.
Learn more about pH:
https://brainly.com/question/172153
#SPJ9
Answer:
color key
creating a color key
have known PH values
A
Explanation:
hope this helps its all the answers in one
The yellow molecules (Y3) react with the blue molecules (B2) to form molecules of Y2B, as shown in the image. Each circle represents one mole, and the atomic masses of Y and B are 32.0 and 54.0, respectively.
How many grams of Y3 are there?
How many grams of B2 are there?
Answers
1. The mass in grams of Y3 present is 1152 g
2. The mass in grams of B2 present is 864 g
Description of mole
The mole of a substance is related to it's mass and molar mass according to the following equation
Mole = mass / molar mass
With the above formula, we can obtain the mass of Y3 and B2. Details below:
1. How to determine the mass of Y3Mole of Y3 = 12 moles Molar mass of Y3 = 3 × 32 = 96 g/mol Mass of Y3 =?
The mass of Y3 can be obtained as follow:
Mole = mass / molar mass
Cross multiply
Mass = mole × molar mass
Mass of Y3 = 12 × 96
Mass of Y3 = 1152 g
2. How to determine the mass of B2Mole of B2 = 8 moles Molar mass of B2 = 2 × 54 = 108 g/mol Mass of B2 =?
The mass of B2 can be obtained as follow:
Mole = mass / molar mass
Cross multiply
Mass = mole × molar mass
Mass of B2 = 8 × 108
Mass of B2 = 864 g
Learn more about mole:
https://brainly.com/question/13314627
#SPJ1
6.Making Inferences Fossil fuels are said to be nonrenewable resources, yet they are produced
by the Earth over millions of years. By what time frame are they considered nonrenewable?
Write a paragraph that explains your answer.
111
Answers
Fossil fuels are considered non-renewable sources of energy because they cannot be replenished within a human lifetime when they are exhausted.
What are fossil fuels?
Fossil fuels are formed from the remains of dead plants and animals which died many million years ago.
Fossil fuels are considered non-renewable sources of energy.
Non-renewable energy sources are energy sources which can not replenished within a human lifetime when they are exhausted.
In conclusion, fossil fuels are non-renewable because they take a lot of time to be replenished.
Learn more about fossil fuels at: https://brainly.com/question/10172005
#SPJ1
0.000083 20 scientific notation
Answers
Answer:
The scientific notation for 0.000083 is 8.3 × 10-5
The 'e' notation for 0.000083 is 8.3^e-5
The number 0.000083 has 2 significant figures
Explanation:
1 - Move the decimal 5 times to right so there is one non-zero digit to the left of the decimal point, untill the resulting number, m (= 8.3), is greater than or equal to 1 and less than 10 (m is the, so called, mantissa).
Since we've moved the decimal 5 times to the right, the exponent will be a negative number n (= -5).
2 - Write in scientific notation form m × 10n,
where m = 8.3 and n = -5.
Therefore, the number 0.000083 written in scientific notation is 8.3 × 10-5 and it has 2 significant figures.
How to convert 0.000083 into "e" notation
We've already converted the number to scientific notation. So, we just need to replace the ' × 10n ' by an 'e'.
Therefore, the 'e' notation for 0.000083 is 8.3^e-5.
what is (3.11*10^-5)-(4.21*10^-2)
Answers
Taking into account the scientific notation, the result of the subtraction is -4.20689×10⁻².
Scientific notation
Scientific notation is a quick way to represent a number using powers of base ten, where the numbers are written as a product:
a×10ⁿ
where:
a is a real number greater than or equal to 1 and less than 10, to which a decimal point is added after the first digit if it is a non-integer number.n is an integer, which is called an exponent or an order of magnitude. Represents the number of times the comma is shifted. It is always an integer, positive if it is shifted to the left, negative if it is shifted to the right.
Subtraction in scientific notation
When the numbers to be added do not have the same base 10 exponent, the base 10 power with the highest exponent must be found. In this case, the highest exponent is -2.
Then all the values are expressed as a function of the base 10 exponent with the highest exponent. In this case: 3.11×10⁻⁵= 0.00311×10⁻²
Taking the quantities to the same exponent, all you have to do is subtract what was previously called the number "a". In this case:
0.00311×10⁻² - 4.21×10⁻²= (0.00311 - 4.21)×10⁻²= -4.20689×10⁻²
Finally, the result of the subtraction is -4.20689×10⁻².
Learn more about operations in scientific notation:
brainly.com/question/1894247
brainly.com/question/11403716
brainly.com/question/853571
#SPJ1
Complete the conclusion questions below. Please write in complete sentences.
1. Describe how the Rube Goldberg device design that you created follows the law of conservation energy. Be sure to include both parts of the law of conservation of energy in your description.
2. Give a real-world example of an energy transformation that uses two of the following forms of energy: chemical, mechanical, nuclear, gravitational, radiant, electrical, thermal (heat), and/or sound. Gravitational energy: Lifting up objects and mechanical: it’s used to move objects
Answers
Rube Goldberg machines, follows the “law of conservation of energy as it uses a chain reaction to complete a simple task in different manner.
How to illustrate the information?
In this machine, various instant kinetic energy is transferred into potential energy and vice-versa, so the total energy remains conserved. Therefore, Rube Goldberg machines follows the law of conservation of energy.
In the machine when marble rolls down from the top it has kinetic energy, the marble hits and falls into a plastic cup, its kinetic energy is then transferred into potential energy that lifts the soda can. Then the potential energy is changed into kinetic energy.
When the marble comes in contact with the next marble, its kinetic energy is transferred to other marble.
Learn more about energy on:
https://brainly.com/question/13881533
#SPJ1
After precipitation falls, the water moves into the lithosphere through
openings in the rock or soil. What is this process called?
O
A. Evaporation
B. Mineralization
C. Percolation
OD. Sublimation
SUBMIT
D
HANA
Answers
After precipitation falls, the water moves into the lithosphere through openings in the rock or soil. This process is called percolation.
Therefore, Option C is the correct option.
What is Evaporation?
Evaporation is defined as the process of conversion of liquid into vapours.
For example: Conversation of water into water vapours.
But int he question, there is no conversion. So this option is incorrect option.
What is Sublimation?
Sublimation is the process of conversion of solid directly into the vapour phase
Since, there is no conversion of of solid into vapours. So, this option also incorrect option.
What is Mineralization?
Mineralization is defined as the process through which chemicals which is present in organic matter are decomposed or oxidized easily in the available forms to plants.
As there is no decomposition of minerals. So, this is also incorrect option.
What is Percolation?
Percolation is defined as the process in which liquid slowly allow to pass through a filter.
So, this is correct option.
Thus, we concluded that the water moves into the lithosphere through openings in the rock or soil. This process is called percolation.
learn more about Sublimation:
https://brainly.com/question/11044849
#SPJ9
If a chemical reaction produces product at a steady rate of 5.2 x 1022 molecules per second, how
long will it take for the reaction to produce 6.0 x 1023 molecules of product? Express your
answer in seconds using the correct number of significant figures. Do not enter your answer
using scientific notation.
Answers
The time taken for the reaction to produce 6.0 x 10²³ molecules is determined as 11.54 seconds.
What is chemical reaction rate?
The rate of a chemical reaction is the change in concentration over the change in time. It can also be said as, the rate at which molecules are produced.
Time taken for the reaction to produce 6.0 x 10²³ molecules
time = number of molecules / rate of reaction
time = (6 x 10²³) / (5.2 x 10²²)
time = 11.54 seconds
Thus, the time taken for the reaction to produce 6.0 x 10²³ molecules is determined as 11.54 seconds.
Learn more about rate of chemical reaction here: https://brainly.com/question/24795637
#SPJ1
Which element has a mass number of 80 and has 45 neutrons? _____________
Is this element a metal, nonmetal, or metalloid? __________________
What is the group number and group name for this element? _________________
Answers
Mercury is an element that has a mass number of 80 and has 45 neutrons.
What are the features of Mercury element?
Mercury is a chemical element with the symbol Hg and atomic number 80. Atomic number is 80 whereas Atomic mass: 200.59 u. Its Melting point is-38.83 °C, Boiling point is 356.7 °C and the Atomic radius is 150 pm. It is a liquid metal that belongs to Group 12 (IIb) or zinc group of the periodic table. It is metal which can be used to produce thermometers, barometers, and other tools. Mercury also conducts electricity and is used to make switches.
So we can conclude that Mercury is the element that has a mass number of 80 and has 45 neutrons.
Learn more about mass number here: https://brainly.com/question/19385703
#SPJ1
A way to express concentration that provides the moles of solute per liter of solution is Blank.target 1 of 5
If you place 5 moles of sodium chloride and 4 moles of sucrose into 11 moles of water, the Blank of sodium chloride would be 0.25.target 2 of 5
The expression of concentration that provides the moles of solute per kilograms of solvent is Blank.target 3 of 5
A solution is made up of 0.15 grams of sodium chloride in 1 liter of water. For this solution, the Blank is water.target 4 of 5
A solution is made up of 0.15 grams of sodium chloride in 1 liter of water. For this solution, the Blank is sodium chloride.target 5 of 5
Answers
The correct answers to the questions are:
1. Molarity
2. Mole fraction
3. Molality
4. Solvent
5. Solute
What is molarity?
This is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:
Molarity = mole / Volume
Thus, a way to express concentration that provides the moles of solute per liter of solution is molarity
How to determine the mole of fraction of NaClMole of sodium chloride, NaCl = 5 molesMole of sucrose = 4 molesMole of water = 11 moles Total moles = 5 + 4 + 11 = 20 molesMole fraction of NaCl =?
Mole fraction = mole / total mole
Mole fraction of NaCl = 5 / 20
Mole fraction of NaCl = 0.25
Thus, the mole fraction of sodium chloride is 0.25
What is molality?
This is defined as the mole of solute per unit kilogram of solvent. It can be expressed mathematically as:
Molality = mole / mass (in Kg) of solvent
Thus, the expression of concentration that provides the moles of solute per kilograms of solvent is molality
What is a solvent?
A solvent is a substance which disolves other substance.
Thus, if 0.15 grams of sodium chloride dissolves in 1 liter of water, then, the water is called the solvent
What is a solute?
This is a substance that dissolves in solvent.
Thus, if 0.15 grams of sodium chloride dissolves in 1 liter of water, then, sodium chloride is the sloute
Learn more about molarity:
https://brainly.com/question/15370276
Learn more about mole fraction:
https://brainly.com/question/2769009
Learn more about Molality:
https://brainly.com/question/4251997
#SPJ1
What is the equation for the base dissociation constant, Kp, of NH3?
NH,(aq)+H_O(P)<_NH_*(aq)+OH(aq)
Answers
The equation for the base dissociation constant, Kp, of NH3 is given as; Kp = [ NH4^+] [OH-]/[NH3]
What is the base dissociation constant?
The term base dissociation constant refers to the number that shows the extent to which a base dissociates in water. A high value of the dissociation constant implies that the base is completely dissociated in water.
Having said that, we can see that the equation for the base dissociation of NH3 is obtained as; NH3(aq) ⇄ NH4^+(aq) + OH-(aq). We also know that water is in large extent hence it does not come into the dissociation equation.
Thus the equation for the base dissociation constant, Kp, of NH3 is given as; Kp = [ NH4^+] [OH-]/[NH3]
Learn more about dissociation constant:https://brainly.com/question/10038290
#SPJ1
The following diagram represents a high - temperature reaction between C*H_{4} and H_{2}*O . Based on this reaction, find how many moles of each product can be obtained starting with 4.0 mol C*H_{4} Section 3.6
Answers
1. The number of mole of CO produced is 4 moles
2. The number of mole of H₂ produced is 12 moles
Balanced equation
2CH₄ + 2H₂O -> 2CO + 6H₂
From the balanced equation above,
2 moles of CH₄ reacted to produced 2 moles of CO and 6 moles of H₂
How to determine the mole of CO produced
From the balanced equation above,
2 moles of CH₄ reacted to produced 2 moles of CO
Thereffoer,
4 moles of CH₄ will also react to produce 4 moles of CO
Thus, 4 moles of CO were obtained from the reaction.
How to determine the mole of H₂ produced
From the balanced equation above,
2 moles of CH₄ reacted to produced 6 moles of H₂
Thereffoer,
4 moles of CH₄ will react to produce =(4 × 6) / 2 = 12 moles of H₂
Thus, 12 moles of H₂ were obtained from the reaction.
Learn more about stoichiometry:
https://brainly.com/question/14735801
#SPJ1
Missing part of the question:
See attached photo
The very next day, Davy used the same method to pull apart caustic soda, or lye, to reveal another new element?
Answers
Davy used the same separation technique to pull apart caustic soda, or lye, and as such this would reveal another new element known as sodium.
What is a separation technique?
A separation technique can be defined as a technique that is used to separate (convert) two or more mixture and solution of chemical substances into distinct products such as solutes, chemical compounds or elements.
What is a chemical element?
A chemical element can be defined as a pure substance which comprises atoms that have the same atomic number (number of protons) in its nuclei and as such it is the primary constituent of matter.
Generally, some examples of a chemical element include the following:
Argon.Sodium.Carbon.Oxygen.Hydrogen.
In Chemistry, sodium hydroxide, caustic soda, or lye all refer to the same chemical compound which is represented by this chemical symbol, NaOH.
According to the narration, Davy used the same separation technique to pull apart caustic soda, or lye, and as such this would reveal another new element known as sodium.
Read more on sodium and lye here: https://brainly.com/question/11183767
#SPJ1
What is the volume of an object that has a density of 12.02 g/ml and a mass of 3
g?
Answers
Answer:
0.25 mL
Explanation:
Since the density is a ratio comparing the mass (g) of the object per every 1 mL, you can use it to convert the given mass (3 grams) to volume. In other words, you can find the volume by multiplying the given mass by the density. It is important to arrange the ratio in a way that allows for the cancellation of units (grams should be in the denominator).
Density = 12.02 g/mL
3 grams 1 mL
---------------- x ---------------------- = 0.25 mL
12.02 grams
*0.2 mL is the answer with 1 sig fig