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The molar mass of any compound contain a number of molecules equal to the number of Avogadro:
6,022 140 857(74).10e+23.

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8y ago
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10y ago

If 6.00g of the unknown compound contained 0.200mol of C and 0.400mol of H, how many moles of oxygen, O, were in the sample?

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14y ago

Divide the mass by the number of moles.

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Q: How do you work out the number of moles of unknown compound if you are only given the molar mass?
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Related questions

Does the molar mass of a compound change depending on the weight of the compound?

Molar mass depend on the ,mass,type and number of atoms in molecules of compound.


The combustion data for an unknown compound containing carbon hydrogen and oxygen was analyzed and the empirical formula for the unknown was found to be C3H4O The molar mass of the unknown was fou?

C6h12o3


The combustion data for an unknown compound containing carbon hydrogen and oxygen was analyzed and the empirical formula for the unknown was found to be C3H5O The molar mass of the unknown was found?

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How is a mass of a compound determined the number of moles?

The molar mass of a compound is equal to 1 mol.


What information is given by a molecular formula?

the empirical formula and the molar mass


What are the steps for calculating molar mass of compound?

molar mass is the atomic mass of the element. it's on the Periodic Table. you just have to add them up. unless you want to calculate the number of moles in a compound, in that case: moles = mass/molar mass


What is the correct molar mass for compound CaBr2?

The molar mass of the compound CaBr2 is 199.9 grams per mole.


List the steps for converting grams to molecules of a compound.?

A mole of a substance contain 6,022 140 857.10ex23 (number of Avogadro - NA ) molecules.A mass (in grams) contain a number of molecules equal to:(given mass x number of Avogadro)/molar mass


What is the molar mass of I2Br7?

253.81 g mol-1


How is the mass of a compund determined from the number of moles?

1 mol is equivalent to the molar mass of a compound, in grams.


How do you calculate the molar mass of ammonia?

To calculate molar mass, you use the following formula.Molar Mass = Given mass / number of moles.For example if you are given that there is 85 gram of ammonia and it is 5 moles. Then Molar Mass = 85/5 = 17 g.


How do you find molar concentration of chemical compounds?

The Stoichiometry of molar concentration follows this simple formula: Mol = Volume (dm³) × Molar Concentration (mol/dm³) Hence: Molar Concentration (mol/dm³) = Number of moles (mol)/ Volume (dm³)