Question

Q1) Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water.What mass of oxygen gas would be required to react completely with 3g of hydrogen gas?

Answer 1

1  :  8

3  :  x

cross multiply

1x=3x8

x=24

24g

verify

8:24 = 1:8

accding law of definite proportions the ratio by mass will remain definite/constant

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Answer 2

Answer:

We know hydrogen and water mix in the ratio 1: 8. For every 1g of hydrogen, it is 8g of oxygen. Hence, 24g of oxygen would be required for the complete reaction with 3g of hydrogen gas.