Question

1... 2H2+O2______2H2O
calculate the number of hydrogen molecules participated in the above reaction

2... 2C +O2 ___ CO2 +Q
calculate the volume of carbon dioxide liberated at STP

3... 2Agcl ____ Ag + cl
calculate the number of moles of chlorine gas liberated

4... Zn + 2Hcl ____ Zncl + H2 + Q
State the information provided by the above balanced chemical equation

5.... how much carbon dioxide is liberated when 50 gm of calcium carbonate react with excess of hydrochloric acid
[ca- 40 u , c - 12 u , o - 16 u ,H - 1 u ,cl - 35.5 u]
caco3 + 2Hcl ____ Cacl2 + H2o+ CO2
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Answer 1

Answer:

1. 4 hydrogen is the answer of the 1 st one