How do you convert from grabs to moles of a substance
1. Divide by the molar mass
2. Subtract the molar mass
3. Add the molar mass
4. Multiple by the molar mass
PLEASE HELP !!!

Answers

Answer 1

The correct question is as follows:

How do you convert from grams to moles of a substance

1. Divide by the molar mass

2. Subtract the molar mass

3. Add the molar mass

4. Multiple by the molar mass

Answer: In order to convert from grams to moles of a substance divide by the molar mass.

Explanation:

The number of moles of a substance is the mass of substance in grams divided by its molar mass.

The formula to calculate moles is as follows.

[tex]Moles = \frac{mass}{molar mass}[/tex]

This means that grams are converted to moles when grams is divided by molar mass.

Thus, we can conclude that in order to convert from grams to moles of a substance divide by the molar mass.


Related Questions

a. Use VSEPR to predict bond angles at the marked atom. The angle is : _______ degrees. The expected hybridization at the marked atom is _____ . b. Use VSEPR to predict bond angles at the marked atom. The angle is : _______ degrees. The expected hybridization at the marked atom is _____ .

Answers

Answer: Hello your question is incomplete attached below is the complete question with the missing diagrams

a) The angle = 120°

  hybridization = sp2

b)  The angle = 120°

  hybridization = sp2

Explanation:

a) using VSPER to predict bond angles

Given that there is the presence of 1 double bond to C and 2 single bonds one to C and one to H around the marked atom which equals 3 sets of electrons surrounding the central atom.

hence according to VSPER theory the angle = 120° while the Hybridization = sp2

b) Using VSPER to predict bond angles at marked atom

Given that there is  There is 1 double bond to C and 2 single bonds to the different C atoms respectively around the marked atom, which makes 3 sets of electorns surrounding the central atom

hence according to VSPER theory the angle = 120° while the Hybridization = sp2

What does the electrostatic force do inside the nucleus?
A. It adds to the strong nuclear force.
B. It holds the protons and neutrons together. C. It causes the protons to repel each other.
D. It cancels out the strong nuclear force​

Answers

Answer:

C. it causes the protons to repel each other.

The reaction of an acid and a base will always produce what kind of salt?
A.
a combination of the cation from the acid and the anion from the base
B.
a combination of the cation from a strong base and the anion from a weak acid
C.
neutral salts from the cation of a strong base and the anion from a weak acid
D.
basic salts from the cation of a strong base and a strong acid
E.
depends on the strength of the acid and the base

Answers

Explanation:

E maybe i am not sure or C

Which of these is most likely to create large areas of land subsidence?

Answers

I think it is Global warming

10 ejemplos de disoluciones identificando el soluto y el solvente y el tipo de disolucion que corresponde

Answers

Answer:

hije51k 5jk45679349fjvokhffgpv9ü

Can someone please help, 20 points
Draw 3-ethyl-2,4-dimethyl octanoic acid

Answers

3-ethyl-2.4-dimethyl-octanoic acid

why are vials made from vapor glass stronger then typical vials?
I.they contain aluminum instead of boron.
II. They submerged in hot salt bath.
III. They formed out of long glass tubes.

A) I
B) I and II
C) I and III
D) I, II, and III

Answers

Answer:

2

Explanation:

I'm not that sure plz tell me if this is right

Witch statement about greenhouse gases is false

Answers

Answer:

???

Explanation:

is A tomato smells rotten a chemical
reaction

Answers

Answer:

yup

Explanation:

because chemical change took place

the reaction cant be reversible

That’s crazy I didn’t know that

How many moles of aluminum sulfide will be produced if 12 moles of Sg react?

Answers

Answer:

Molar mass = [9(12.0)+8(1.01)+4(16.0)] = 180.1 g/mol Moles = 112 g 1 mol x 180.1 g = 0.622 mol (3 sig figs)

Explanation:

A gas occupies a volume of 2.50 L at a pressure of 350.0 kPa. If the temperature remains
constant, what volume would the gas occupy at 1750 kPa ?
1. 12.5 L
2. 5.00 L
3. 1.40e+2L
4. 0.500 L

Answers

Answer:

V₂ = 0.5 L

Explanation:

Given that,

Initial volume, V₁ = 2.5 L

Pressure, P₁ = 350 kPa

New pressure, P₂ = 1750 kPa

We need to find the new volume if the temperature remains constant. The mathematical relation between P and V is :

[tex]P\propto \dfrac{1}{V}\\\\or\\\\\dfrac{P_1}{P_2}=\dfrac{V_2}{V_1}[/tex]

Where

V₂ is new volume

So,

[tex]V_2=\dfrac{P_1V_1}{P_2}\\\\V_2=\dfrac{350\times 2.5}{1750}\\\\V_2=0.5\ L[/tex]

So, the new volume is equal to 0.5 L.

When temperature drops, (for example from 20 degrees celsius to 10 degrees celsius)

a.) energy increases

b.) particles move slower

c.) particles collide more often

d.) pressure increases

Answers

Answer:

In the Celsius scale each degree is one part of 100 degrees. This is because in this scale the difference between boiling and freezing temperatures of water is 100 ° - 0 ° = 100 °, so one degree Celsius is one part of 100.

In the Farhenheit scale, each degree is one part of 180 degrees. This is because in this scale the difference between the boiling and freezing temperatures are 212 ° - 32 ° = 180°, so one degree Fahrenheti is one part of 180.

That means that 1 °C is a larger amount than 1 °C, so 20°C is a larger amount than 20°F.

Conclusion: 20 degree change represents a larger change in Celsius scale.

Explanation:

In the Celsius scale each degree is one part of 100 degrees. This is because in this scale the difference between boiling and freezing temperatures of water is 100 ° - 0 ° = 100 °, so one degree Celsius is one part of 100.

In the Farhenheit scale, each degree is one part of 180 degrees. This is because in this scale the difference between the boiling and freezing temperatures are 212 ° - 32 ° = 180°, so one degree Fahrenheti is one part of 180.

That means that 1 °C is a larger amount than 1 °C, so 20°C is a larger amount than 20°F.

Conclusion: 20 degree change represents a larger change in Celsius scale.

What is the molarity of a solution made from dissolving 3.0 moles of KCl in 500 mL of solution?
A. 750 M KCl solution
B. 3.0 M KCl solution
C. 0.06M KCl solution
D. 6M KCl solution

Answers

Answer:

najah zggs haihß hajoa ha8 a an àjàhajß

If there are 10.00 moles of ascorbic acid(C6H8O6), what is the mass of ascorbic acid?

Answers

Given

no of moles = 10 mol

we know that mass of 1 mole ascorbic acid is 176.12,

mass id 10 mole of ascorbic acid = 10× 176.12

= 1761.2 g

Answer - 1761.2 grams

Find the moles of 127.5g of NaCl.

Answers

Answer:

n = 2.18 moles

Explanation:

Given that,

Mass = 127.5g

Molar mass of NaCl = 58.44 g/mol

We need to find the number of moles. We know that,

No. of moles = Given mass/molar mass

Put all the values,

[tex]n=\dfrac{127.5\ g}{58.44\ g/mol}\\\\n=2.18\ moles[/tex]

Hence, there are 2.18 moles of 127.5g of NaCl.

What are five different types of air pollutant each

Answers

5 types of air pollution would include: Carbon Monoxide, Lead, Nitrogen oxides, sulfur oxides. I only know those 4 actually… hope it helped

3.What is evaporation?
(1 Point)

change from solid to liquid

change from solid to gas

change from liquid to solid

change from liquid to gas

change from gas to solid

change from gas to liquid
4.What happens to the motion of particles after evaporation?
(1 Point)

faster

slower
5.What happens to the kinetic energy of particles after evaporation?
(1 Point)

increased

decreased
6.What happens to the distance between particles after evaporation?Immersive Reader
(1 Point)

smaller

wider

Answers

Evaporation is the change from a liquid to gas

HELP PLEASE!!!!!!!
140 grams of lead (II) nitrate are dissolved in water then mixed with a solution containing 75 grams of sodium chloride. The reaction creates the precipitate, lead (II) Chloride, and a solution of sodium nitrate. How many grams of lead (II) Chloride can be produced given the initial amount of lead (II) nitrate?

Answers

Answer:

    Try a grams calculator, Its pretty to nd one :D

Explanation:

Balance the following equation:
-_MgCO3 → _MgO + __CO2

Answers

Answer:

Decomposition

Explanation:

Magnesite = Magnesium Oxide + Carbon Dioxide

how much water should be added to 80 grams of common salt so as to obtain 20% salt solution​

Answers

concentration of solution is 20%

Mass of solute( common salt) is 80g

take the amount of water as x

mass of the solvent = (80+x)

We know, concentration of solution = (mass of solute/mass of solution)×100

20=(80/80+x)×100

80+x=80×5 ( we devide the both side by 20)

x= 400-80

x=320 g

The partial pressure of N2 in a mixture of gases, where the total pressure is 1.50 atm, is 300. torr. What is the mole fraction of N2

Answers

Answer:

The mole fraction of N₂ is 0.26.

Explanation:

The pressure exerted by a particular gas in a mixture is known as its partial pressure. So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:

PT = PA + PB

This relationship is due to the assumption that there are no attractive forces between the gases.

Dalton's partial pressure law can also be expressed in terms of the mole fraction of the gas in the mixture. The mole fraction is a dimensionless quantity that expresses the ratio of the number of moles of a component to the number of moles of all the components present.

So in a mixture of two or more gases, the partial pressure of gas A can be expressed as:

PA = XA * PT

In this case:

PA= PN₂= 300 torrXA=XN₂= ?PT= 1.50 atm= 1140 torr (being 1 atm= 760 torr)

Replacing:

300 torr= XN₂*1140 torr

Solving:

[tex]X_{N_{2} } =\frac{300 torr}{1140 torr}[/tex]

XN₂= 0.26

The mole fraction of N₂ is 0.26.

Which equation correctly represents the dissociation of a strong acid in water?



Question 26 options:

CH3COOH ↔H++ CH3COO−

NaOH →Na++OH−

HCl →H+ +Cl−

NH3+ H2O↔ NH4++ OH−

Answers

The equation that correctly represents the dissociation of a strong acid in water is as follows: HCl → H+ + Cl−

What is acid dissociation?

Acid dissociation is the process by which an acid breaks up into it's constituent ions in an aqueous solution.

Acids are known to contain hydrogen ions (H+), hence, dissociate into H+ and an anion.

A strong acid like HCl dissociates completely in an aqueous solution while a weak acid does not dissociate completely.

According to this question, hydrogen chloride (HCl) is said to dissociate into hydrogen ion (H+) and chloride (Cl-) according to the following expression:

HCl → H+ + Cl−

Learn more about acid dissociation at: https://brainly.com/question/4363472

#SPJ1

Porque una solución acuosa 30g de sal en 80g de agua Que % de masa de sal contiene

Answers

Given :

An aqueous solution of 30g of salt in 80g of water.

To Find :

The % mass of the salt.

Solution :

Mass percentage of the salt is given by :

[tex]Mass \ \% = \dfrac{Mass \ of \ salt}{Mass \ of \ salt + Mass \ of \ water}\\\\Mass \ \% = \dfrac{30}{30 + 80 }\times 100 \%\\\\Mass \ \% = 27.27\ \%[/tex]

Hence, this is the required solution.

Which tool was most likely used in a procedure if the lab report shows that 300 mL of water was used?
A volumetric flask
A thermometer
A pipette
A graduated cylinder

Answers

The answer is A - Volumetric Flask!

does neutrons have a positive charge​

Answers

Answer:

neutrons have no charge

Answer:

No it doesnt

Explanation:

A student observed an example in which all of the offspring of an organism have the same
genetic material, which is identical to the parent organism. Based on this the student can
conclude that this organism
A.
is unicellular
B.
makes its own food.
C.
reproduces asexually.
D.
has a lot of genetic diversity.

Answers

The answer is C I believe because it makes sense

A piece of wood burns to form ash. ____C_____ Water evaporates into steam. ____P_____ A piece of cork is cut in half. ____P_____ A bicycle chain rusts. _____C______ Food is digested in the stomach. _____C______ Water is absorbed by a paper towel. _____P______ Hydrochloric Acid reacts with zinc. _____C______ A piece of an apple rots on the ground. ____C_____ A tire is inflated with air. ____P____ A Plant turns sunlight, CO2, and water into sugar and oxygen. ____C_____ Sugar dissolves in water. ____C_____ Eggs turn into an omelet. _____C______ Milk sours. _____C______ A popsicle melts. _____P_______ Turning brownie mix into brownies. _____C______

Answers

Answer:

A piece of wood burns to form ash - Chemical change

Water evaporates into steam - Physical change

A piece of cork is cut in half. __ Physical change

A bicycle chain rusts. _____Chemical change

Food is digested in the stomach. _____Chemical change

Water is absorbed by a paper towel. _____Physical change

Hydrochloric Acid reacts with zinc. _____Chemical change

A piece of an apple rots on the ground. ____Chemical change

A tire is inflated with air - Physical change

A Plant turns sunlight, CO2, and water into sugar and oxygen. _Chemical change

Sugar dissolves in water - Physical change

Eggs turn into an omelet. _____Chemical change

Milk sours. Chemical change

A popsicle melts. _____Physical change

Turning brownie mix into brownies. Chemical change

Explanation:

Matter undergoes two types of changes: physical changes and chemical changes.

A physical change is one that affects only the physical properties of a substance such as colour, size, shape, etc., and in which no new substances are formed. Physical changes are easily reversible.

Chemical changes are changes which affect the chemical characteristics and properties of a substance such as reactivity, acidity, basicity, etc., resulting in the formation of new substances.

The following changes below are categorized as either physical or chemical changes based on which of the properties of the substance is affected and whether new substances result or not.

A piece of wood burns to form ash - Chemical change

Water evaporates into steam - Physical change

A piece of cork is cut in half. __ Physical change

A bicycle chain rusts. _____Chemical change

Food is digested in the stomach. _____Chemical change

Water is absorbed by a paper towel. _____Physical change

Hydrochloric Acid reacts with zinc. _____Chemical change

A piece of an apple rots on the ground. ____Chemical change

A tire is inflated with air - Physical change

A Plant turns sunlight, CO2, and water into sugar and oxygen. _Chemical change

Sugar dissolves in water - Physical change

Eggs turn into an omelet. _ Chemical change

Milk sours - Chemical change

A popsicle melts. _____Physical change

Turning brownie mix into brownies - Chemical change

PLZ HELP... provide the correct coefficients to balance the chemical equation C2H6+O2 -> CO2 + H20

Answers

2 = C2H6
7 = O2
4 = CO2
6 = H2O

What is the smallest kind of volcano

Answers

Answer:

Cinder cones

Explanation:

10. A community currently uses coal to produce electricity. What would be an
advantage of using nuclear energy instead? *
a. Uranium is safer than coal
b. Nuclear energy produces no waste
c. Uranium deposits are more abundant than coal
d. Nuclear energy does not produce greenhouse gases

Answers

Answer:

c

Explanation:

I'm pretty sure it's C. If it is not then it might be d

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