Question

Number of moles present in 36 g of water​

Answer 1

Answer:

Explanation:

The relationship between the number of moles of a given substance present in a sample and the mass of the sample is given by the molar mass of the substance.

For any chemical species, you have

molar mass

=

the mass of exactly 1 mole

−−−−−−−−−−−−−−−−−−−−−−−

Now, water has a molar mass of

18.015 g mol

−

1

, which means that

1

mole of water has a mass of

18.015 g

.

18.015 g mol

−

1

=

18.015 g

1 mole H

2

O

So for every

18.015 g

of water present in your sample, you have

1

mole of water.

This means that your

36-g

sample will contain

2 moles

of moles = 36/18 = 2 moles.

Answer 2

Answer:

2 Moles.

Explanation:

• Weight of water (h2O) = 2×1 + 16 = 18 grams.
• Moles = Total weight ÷ Molar mass.
• 36/18 = 2 moles.
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