Question

On the right it says molecules H2o in questions 1 and 2​

Answer 1

For 1: 12.0 moles of water will contain
`7.2264* 10^(24)` number of molecules

For 2: The given amount of water molecules will be present in 5.41 moles of water.

Step-by-step explanation:

According to the mole concept:

1 mole of a compound contains
`6.022* 10^(23)` number of molecules

• For 1:

We are given:

Moles of water = 12.0 moles

Using above concept:

If 1 mole of a compound contains
`6.022* 10^(23)` number of molecules

So, 12.0 moles of water will contain =
`(12.0* 6.022* 10^(23))=7.2264* 10^(24)` number of molecules

Hence, 12.0 moles of water will contain
`7.2264* 10^(24)` number of molecules

• For 2:

We are given:

Molecules of water =
`3.26* 10^(24)` molecules

Using above concept:

If
`6.022* 10^(23)` number of molecules are present in 1 mole of a compound

So,
`3.26* 10^(24)` number of molecules will be present in =
`(1mol)/(6.022* 10^(23))* 3.26* 10^(24)=5.41` moles of water

Hence, the given amount of water molecules will be present in 5.41 moles of water.