# How do you convert from grams to moles and also from moles to grams?

#### already exists.

Would you like to merge this question into it?

#### already exists as an alternate of this question.

Would you like to make it the primary and merge this question into it?

#### exists and is an alternate of .

You must first find the molar mass of the element or compound. Use the periodic table (see the link to the left of the answer). If the chemical is an element, just read off the atomic mass from the periodic table. If it is a compound, you must know the molecular formula, and then you find the total molar mass of the compound by adding up the atomic masses of each atom in the compound. The unit of the molar mass will be in grams per moles (g/mole)
Once you have the molar mass, you can easily convert from grams to moles, and also from moles to grams.
Number of moles = (# of grams) / (molar mass)
Number of grams = (# of moles) * (molar mass)
Here are a two examples:
Example 1:
How many moles are in 5 grams of O2?
The molar mass of O2 = 16.00 g/mole x 2 (for 2 atoms of oxygen) or 32.00 g/mole.
5 g of O2 / (32 g/mole) = 0.15625 moles
Example 2:
How many grams does 4 moles of NH3 weigh?
The molar mass of NH3 = 14.01 + (3 * 1.01) = 17.04 g/mole

4 moles * 17.04 g/mole = 68.16 grams Grams in a MoleIn chemistry a mole is considered to be Avogadro's number (6.02 x 1023)of molecules (or atoms) of a substance - so depending on the density of the substance, the mass of that amount of the substance could vary widely.
One mole of hydrogen, for example, would have a different mass than one mole of lead. The question compares two different measurements of a given substance, rather like asking "how heavy is a gallon?". The question becomes "A gallon of what"?

*On the other hand, the Eastern Mole (Scalopus aquaticus) a small, burrowing mammal, weighs between 54 and 99 grams at adult size.
To convert grams to moles simply multiply the molar mass by the number of moles.
85 people found this useful

# Convert grams to moles?

42.7 grams of AL(OH) 3 to Moles

# How do you convert moles to grams and grams to moles?

MOLES TO GRAMS Multiply the number of moles by the molar mass of the substance. CONVERSION FACTOR Number of moles x Molar mass ////////////////////////// 1 mol GRA

# How do you convert moles to gram moles?

Chemical Engineers sometimes measure substance amount in units of gram-moles, kilogram-moles, pound-moles, or ounce-moles; these measure the quantity of a substance whose mole

# Convert grams per mole to moles?

first you must have a mass in mind. eg 345 grams of Carbon divided the mass by the molar weight of the particular substance. In the case of Carbon 12 grams/mole 345 gram

# How do you convert 0.40 moles to grams?

A mole is not a unit of weight. A mole tells you how many atoms or molecules you have of a given substance (that number being 6.023 x 10 23 which is also known as Avogadro's

# Convert moles of water to grams?

Multiply no. of moles with the molecular mass of water i.e 18g to get the mass of water in grams

# Convert from moles to grams?

For converting any substance in moles to grams:- Grams= No. of moles x Atomic or molecular mass.

# How do you convert mole fractions to grams?

Multiply moles times the molar mass of the substance in grams/mole.

# What is the formula to convert moles to grams?

Moles is equal to grams divided by the mw therefore grams=(mw)(moles).

# How do you convert moles of atoms to grams?

Multiply number of moles by the molecular mass of the element or compound

# How do you convert from moles to gram?

It depends on the RMM (relative molecular mass) of the molecule your dealing with. For example if you had 2 Moles of ethene (C 2 H 4 ) then you would simply multiply the nu

# How do you convert 2.9 grams to moles?

You divide by the molecular weight. This can be foundon the periodic table by adding the atomic masses. (It's units arealready grams per mole).
In Chemistry

# What is 1.66 moles converted to grams?

You need to know moles of what -- for example a mole of water weighs 18 g; a mole of FeO weighs 57.8 g!
In Chemistry

# What is the formula to convert grams to moles?

Divide grams by the molar mass of the substance.
In Chemistry

# How do you convert 00366 grams to moles?

This depends on what element/molecule you're converting. You use the molar mass. (The sum of atomic mass of all the elements you're using.) Divide .00336 (since that what I'
In Chemistry

# What is 34 grams converted to moles?

You need to provide the element or molecule name in order todetermine the number of moles from the mass that you use. Tocalculate moles from grams from the given information,
In Science

# What is 59.04 grams converted to moles?

Meaningless unless you specify the type of molecule.