Resources C 2 Flashcardspp.135-137

These flash cards require a Periodic Table and a

calculator.

Using this equation:3H2 + N2 2NH3

How many moles of H2 are needed to completely react with 2 moles of N2?

6 moles of H2

Using this equation:3H2 + N2 2NH3

What would be the mass (in grams) of 2 moles of N2?

56 g of N2

What is the molar mass for:

Na2S

78g1 mole

What is the molar mass for:

Mg(OH)2

58g1mole

How many grams of carbon are in one mole?

12 grams

How many atoms are in one mole of boron, B?

6.02 x 1023 atoms

How many moles of NH3 can be produced from 6 moles of N2?

N2 + 3H2 2NH3

12 moles NH3

If we need 631 g of sucrose, C12H22O11, how many moles would that be?

631 g x 1 mole = 1.84 moles1 342g C12H22O11

If we need 3.0 moles of sand, SiO2 how many grams would we need to measure out?

3.0 mole x 60g SiO2 = 1 1 mole

180g SiO2

How many moles of H2 will completely react with 4 moles of O2 ?

2H2 + O2 2H2O

8 moles H2