Question

Checking answers

Answer 1

How many grams of oxygen gas will react completely with a block of calcium metal that is 3.0 cm by 3.5 cm by 4.2 cm, if the density of calcium is 1.55 g/mL? Show all steps of your calculation as well as the final answer.

Ca + O2 → CaO

Answer 2

2Ca + O2 -> CaO
3.0*3.5*4.2 = 44.1 mL
1.55 g/mL * 44.1 mL
68.36 g Ca.
68.36g/40.08g/mol
1.71 mols Ca.
1.71/2 mols O2
0.85 *16.0 g/mol
13.6 g of O2.

Answer 3

@ganeshie8