Question

()calculate the number of moles present in 36ɢ of water ​

Answer 1

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

Answer 2

Answer:

2 moles

Explanation:

1 mole contains

$2 + 16 = 18$

grams .meams h H have 1 gram so 2 H =2

O Has 16gram so I mole contains 18 gram

so 36 gram H20 has 2 moles