Question

How many moles are in 59.75 grams of water?

Answer 1

3.32moles

Step-by-step explanation:

Number of moles of a substance is given by

n = mass of the substance given(grams) / molar mass of the substance(grams per mole)

Chemical formula for water is H2O

mass of H2O given = 59.75grams

molar mass of H2O = (2 X molar mass of Hydrogen) + molar mass of oxygen

Molar mass of hydrogen =

1.00784u ~ 1u

Molar mass of oxygen =

15.999u ~ 16u

Molar mass of H2O = (2 X 1) + 16

= 18 g/mol

n = (59.75g) / (18g/mol)

n = 3.32mol

Therefore, there are 3.32 moles in 59.75 grams of water

Answer 2

Answer: 3.32 moles

Step-by-step explanation:

Water has a chemical formula of H2O.

Now given that:

Number of moles = ?

Mass in grams = 59.75 grams

Molar mass of water H2O = ?

Use the atomic mass of hydrogen = 2g, Oxygen = 16g

So, H2O = (2 x 1) + 16

= 2 + 16 = 18g/mol

Recall that:

Number of moles = (Mass in grams/ Molar mass)

No. of moles = 59.75 grams / 18g/mol

= 3.32 moles

Thus, there are 3.32 moles of water present