The Mole

1

100

What is Avogadro's number?

6.02x10²³

200

What has more mass, a mole or carbon and a mole of gold?

Gold

300

How many grams are there when you have 3 mol of boron?

32.43g

400

How many grams are there in 3.7 mol of MgS?

208.57g 

500

What is the percent by mass of hydrogen in H₂O?

11%

2

100

How many particles are in a mole?

6.02x10²³

200

What is the empirical formula of H₁₂Si₃?

H₄Si

300

How many moles are there in 40 grams of flourine?

2.11 mol

400

How many moles of NF₃ are in 50g?

o.7 mol

500

If a compound has an empirical formula of HO and a molar mass of 68.04 g/mol, what is the molecular formula?

H₄O₄

3

100

What is the unit for molar mass?

grams/mole

200

What is the empirical formula for Mg₂₇S₁₈?

Mg₃S₂

300

How many atoms are there in 20g of oxygen?

7.53x10²³

400

How many molecules are in 23g of H₂O?

7.68x10²³

500

What is the percent by mass of sodium in Na₂S?

59%

4

100

What is the equation for percent composition?

((mass of element)/(mass of compound))x100

200

What is the molar mass of CaF₂?

78.08 g/mol

300

How many moles are there in 60g of CF₄?

0.68 mol

400

How many grams are in 3.4 mol of K₂Br₂?

8092.21g

500

What is the percent by mass of carbon in HCN?

44%

5

100

How do you calculate atomic mass?

Multiply the molar mass of each element by the number of mol of that element in the compound then combine these values of all elements in the compound

200

What is the molar mass of Be₄O₄?

100.04 g/mol

300

How many grams are in 4 mol of S?

128.26g

400

How many moles are in 500g of Mg₂Si?

6.52 mol

500

If a compound has an empirical formula of HF and a molecular mass of 120.04, what is the molecular formula?

H₆F₆