Molar Mass & Percentages

Finding Molar Mass

100

(45 Seconds)
What is the molar mass of H₂O?

18.015 g/mol

200

(45 seconds)
What is the molar mass of CO₂?

44.009 g/mol

300

(60 seconds)
What is the molar mass of salt, NaCl?

58.443 g/mol

400

(90 seconds)
What is the molar mass of CaCO₃?

100.086 g/mol

500

(120 seconds)
What is the molar mass of Al₂(SO₄)₃?

342.15 g/mol

Converting Grams & Moles

100

(20 seconds)
If I have 1 mole of oxygen, how many grams of oxygen do I have?

15.999 g

200

(30 seconds)
If I have 1 mole of zinc, how many grams of zinc do I have?

65.38 g

300

(75 seconds)
If I have 44.0 grams of sodium, how many many moles of sodium do I have?
(round to the second decimal place)

1.91 moles

400

(90 seconds)
If I have 34.2 grams of lithium, how many moles of lithium do I have?
(round to the second decimal place)

4.93 moles

500

(120 seconds)
If I have 200 grams of FeO, how many moles of FeO do I have?
(round to the second decimal place)

2.78 moles

Finding Percent Mass

100

(60 seconds)
What is the percent mass of Fluorine in HF?

94.962%

200

(75 seconds)
What is the percent mass of magnesium in MgO? (round to the third decimal place)

60.304%

300

(90 seconds)
What is the percent mass of aluminum in aluminum phosphorus, AlP?
(round to the third decimal place)

46.556%

400

(105 seconds)
What is the percent mass of gold in AuAg?
(round to the fourth decimal place)

64.6143%

500

(120 seconds)
What is the percent mass of oxygen in CuSO₄?
(round to the third decimal point)

40.096%

Hard Mode (Double Points)

100

(10 seconds)
What is Avogadro's constant?

6.02 x 10²³

200

(40 seconds)
What is the percent mass of manganese in MgO?

0% manganese

300

(30 seconds)
If I have 5 moles of H₂O, how many moles of hydrogen do I have?

10 moles of hydrogen

400

(10 seconds)
What percentage of your body is carbon?

18-19%