Question

2 H2 + O2 --> 2 H2O

What mass of water (H2O) will be collected if 20. 0 grams of hydrogen gas (H2) are consumed?

Select one:


179 grams


89. 4 grams


44. 7 grams


358 grams

Answer 1

2H2 +O2 - 2H20

4g of H react to give 36g of H20

20g of H gives Xg of H20

cross multiply

4x= 36*20

4x= 720

Xg = 720/4

Xg= 180g approximately

That is A which is 179