FT 1 - Quantitative Chemistry Fun Games

One mol of Ca is equal to____of Ca (Ar Ca = 40).

• 20 g

• 30 g

• 40 g

• 50 g

Two moles of Mg is equal to____of Mg (Ar Ca = 24).

• 24 g

• 36 g

• 48 g

• 60 g

40 g of NaOH is equal to____of NaOH (Ar Na = 23, Ar O = 16, Ar H = 1).

• 1 mol

• 2 mol

• 3 mol

• 5 mol

3.65 g of HCl is equal to____of HCl (Ar H = 1, Cl = 35.5).

• 0.1 mol

• 0.2 mol

• 0.3 mol

• 0.4 mol

The mass percentage of C in CH₄ is (Ar C = 12, Ar H = 1)....

• 25%

• 50%

• 75%

• 100%

The mass percentage of H in C₂H₆ is (Ar C = 12, Ar H = 1)....

• 20%

• 40%

• 60%

• 80%

The empirical formula of H₂O is....

• H₂O

• H₂O₄

• H₄O₂

• H₄O₄

The empirical formula of H₂O₂ is....

• HO

• H₂O

• H₄O₂

• H₄O₄

A chemical compound contains 80% C and 20% H. What is its empirical formula?

• CH₃

• CH₄

• CH₅

• CH₆

A chemical compound contains 80% C and 20% H. If the Mr of the compound is 30, what is its molecular formula?

• C₂H₆

• C₃H₉

• C₄H₁₂

• C₅H₁₅