Question

Deduce the number of moles of the following compounds

90 g water​

Answer 1

Answer:

Number of moles in water = Molecular mass of water/Mass of water in grams

90/18=5 moles.

5 moles of H2O contains 5×6.022×10^23molecules =30.11×10 ^23molecules

Answer 2

Explanation:

NUMBER OF MOLES IN WATER =

MASS OF WATER IN GRAMS

_______________________

MOLECULAR MASS OF WATER

= 90 BY 18 = 5 MOLES

5 MOLES OF H20 CONTAINS----------- 5 × 6.022 × 1023 MOLECULES = 30.11 × 1023 MOLECULES