Question

whoever will answer this, will be marked the brainliest.
When 4g of hydrogen comes in contact with oxygen in presence of electricity, they form water. What is the mass of water formed? (At. mass of H=1, O=16)
​

Answer 1

Answer:

9 gram

hope it will help you

please please mark me brainlest

Explanation:

The molecular masses of hydrogen, oxygen and water are 2 g/mole, 32 g/mole and 18 g/mole respectively.

2H

2

+O

2

→2H

2

O

2×2=4 g of hydrogen reacts with 1×32=32 g of oxygen to form 2×18=36 g of water.

Hence,

4

4

=1 g of hydrogen reacts with

4

32

=8 g of oxygen to form

4

36

=9 g of water.

9 grams of water can be produced when 8 g of hydrogen reacts with 8 g oxygen

Answer 2

Answer:

H2+21O2⟶H2O

Mass-4g20g

Moles-20.625

1 mole of H2 requires 0.5 moles of O2.

∴ 1.25 moles of H2 requires 0.625 moles of O2

∴ O2 is a limiting reagent.

 0.5 mole O2⟶1 mole H2O

∴0.625 mole O2=0.51×0.625 moles H2O.

                   =1.25 moles of H2O

Therefore, mass of H2O formed =1.25×18=22.5 gm