What is the type of conversion factor needed in a problem in which mass is being converted to moles?

Answer 1

moles to atoms you multiply the number of moles by avogadros number

ex:

1.32 mol x (6.022 x 10^23 atoms)/mol

mass to atoms you multiply the mass (in grams) times the molar mass of the element or compound (ex: N 14.01 mols/gram) then times avogadros number once you have the moles.

ex:

45.6 g N x (14.01 mol/gram) x (6.022 x 10 ^23 atoms/mol)

if it's a compound instead of an element, find the molar mass of the compound (the molar masses of all the elements in it added up) and multiply by it.

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Actually you are wrong, from mass to atoms you need to take the initial mass divide by the gram of the element that you are doing and multiply by the Avogadros number

Answer 2

If it say moles of X to grams of Y then you first would use the mole ratio (find by looking at the balanced equation) and then use the molar mass (find by looking at Periodic Table) of Y as a conversion. For example: 2X+4Y yields something. The questions states there are 3 moles of X and it wants the grams Y. (molar mass of Y=2.5)

3mol X l 4 mol Y l 2.5g Y

l 2 mol X l 1 mol Y

If you don't solve that way you divide initial moles by moles of it in the balanced equation and times that by the moles of what your looking for, and times by the molar mass.

3 divided by 2, times 4, times 2.5

grams of Y = 15

Answer 3

This formula is:

moles = mass of the compound/molar mass of the componnd

Answer 4

number of moles=(mass of the substance)/(the gram formula mass(add up the masses from a periodic table))

Answer 5

Use the molar mass of an element or compound to convert between the mass of a substance and the moles of a substance.

Mass(GRAMS)=number of moles x mass(GRAMS)/1 MOLE

Answer 6

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