Write balanced chemical equations for the following reactions: a) hydrogen gas + nitrogen gas gives ammonia.

b) sodium peroxide + water gives sodium hydroxide + oxygen gas.

If you can explain how to do it it'll be greatly appreciated.

Solution given:

a) hydrogen gas + nitrogen gas gives ammonia.

Balanced chemical equation:

when pure and dry Nitrogen and Hydrogen gas is passed in the ratio 2:3 at 450°C temperature 200-900 ATM pressure in tye presence of iron as catalyst and molybdenum as promotor which forms Ammonia.

b) sodium peroxide + water gives sodium hydroxide + oxygen gas.

Balanced chemical equation:

When sodium peroxide is combined with hot water double displacement reaction takes place and forms sodium hydroxide and oxygen gas along with heat.

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2