Question

find the number of mole in 90 gram of water​

Answer 1

Answer:

The molecular weight of water is 18 g/mol.

The number of moles in 90 g of water is

molecular weight of water

Mass of water

=

18g/mol

90g

=5mol

Answer 2

Answer:

number of mole in 90 gram of water​ is 5 moles

Explanation:

mole = given mass/ molar mass

given mass = 90 g

mass of water = H2O = mass of hydrogen x 2 + mass of oxygen = 2 + 16 = 18 u

as per the formula

mole = 90/18

mole = 5

therefore number of mole in 90 gram of water​ is 5 moles

hope it helps

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