Conversion Factors
Conversion problems
Percent composition
Empirical Formula
Molecular Formula
100

How many things are in 1 mole?

What is 6.022 x 1023?

100

This is the number of moles in 98.5 grams of gold.

What is 0.500 moles (or half a mole)?

100
After dividing the 2 masses (elements/total compound), you must multiply by this number always to get the percent composition.
What is 100?
100

This is the empirical formula for N4O10.

What is N2O5?

100
This is the difference between molecular formula and empirical formula.
What is empirical formula shows ratio of atoms while molecular formula shows the number of each atom in 1 molecule? (subscripts are different)
200

This is where to look to find the mass of 1 mole of any element.

What is the Periodic Table?

200

This is the mass of 6.39 moles of table salt.

What is 373.5 grams?

200
This is the percent composition of hydrogen in water.
What is 11.1% H?
200
This is the first step in calculating the molecular formula if empirical formula and molar mass of molecular formula is given.
What is find the molar mass of the empirical formula?
300

You find this number by adding the masses of all atoms in the compound.

What is molar mass?

300
This is the percent composition of hydrogen in ammonium ion.
What is 22.2% H?
300

This is the molecular formula of a compound if its empirical formula is C2OH4 and it has a molar mass of 88 g/mol.

What is C4O2H8?

400

One mole of any compound said to contain this number of formula units or molecules?

What is Avogadro's Number?

400

This is how many molecules are in 25g of ammonia.

What is 8.86x1023 molecules of ammonia?

400

This is the percent composition of nitrogen in (NH4)2S?

What is 11.8% N?

400

This is the molecular formula for a compound that has an empirical formula of C4H8N2O and a mass of 200 g/mol.

What is C8H16N4O2?

500

This is how many atoms are in 100g of potassium hydroxide.

What is 3.22x1024 atoms?

500

What is the percent composition of oxygen in copper (II) phosphate?

What is 33.6% O?

128/380.65 =33.6

500

This is the molecular formula of a compound that has an empirical formula of C5H12N2 and a molar mass of 300 g/mol.

What is C15H36N6?

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