Use the following equation to answer the questions and show all work.

a.36 g of water is produced.

b.64 g of is consumed.

Explanation:

The reaction is ⇒

a.

Given,

Weight of reacted = 4g

Weight of 1 mole of = 21 = 2g

Therefore no. of moles of reacted = = 2 moles;

Also given,

Weight of reacted = 32 g

Weight of 1 mole of = 216 = 32 g

Therefore no. of moles of reacted = = 1

We know that 2 moles of Hydrogen reacts with 1 mole of Oxygen to give 2 moles of water,

As we took 2 moles of Hydrogen and 1 mole of Oxygen,

Directly,from the equation we can tell 2moles of water will be produced.

Therefore no. of moles of produced = 2

Weight of 1 mole of water = = 18

Therefore weight of produced = = 36gm

b.

Given ,

72 g of is produced.

So,

no. of moles of produced = = 4 moles

From equation For every 2 moles of water formed , 1 mole of oxygen must be required.

So for producing 4 moles of water,

No. of moles of Oxygen required = 2 moles.

Therefore weight of reacted = = 64 g

Method 2:

Given,

8 g of has reacted.

So,

no. of moles of reacted = = 4 moles.

From equation , we know that For every 2 moles of reacted,1 mole of will react.

Therefore,

No. of moles of that reacts with 4 moles of = = 2 moles

Therefore the weight of reacted = = 64 g

it is the most commonly accepted one