Question

Please help me with this.......

Answer 1

Answer:

number of molecules= mass/molecular mass

n=90/18

n=10/2

n=5

a. 5 moles of molecules

Answer 2

Explanation:

To determine the number of molecules in a particular compound, we need to first determine the number of moles present in that mass. Hence 90 g of water will contain 30.11×10^(23) molecules.

so option a)

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