Question

5. Number of moles corresponding to
90 g of water is...
a. 3
b. 5
O
c. 2
O d. 1​

Answer 1

Answer:

The molecular weight of water is 18 g/mol.

The number of moles in 90 g of water is

mass of water

——--------------------

molecular weight of water

= 90 g

--------------------

18g/mol

=5mol

Answer 2

Answer:

5 moles

Explanation:

hydrogen weight and oxygen weight

1+1+16

18

so , a mole of water is 18 gram

we have,

= 90/18

5 moles