29.7k views
1 vote
How many moles of water are present in 15.00 ml of water

that has a density of 0.9956 g/ ml.
MW for Hydrogen 1.00 g/ 1 mole; MW for Oxygen 16.00 g/ 1 mole

1 Answer

6 votes

Answer : The moles of water present in solution are, 0.8297 moles.

Explanation :

First we have to calculate the mass of water.


\text{Mass of water}=\text{Density of water}* \text{Volume of water}


\text{Mass of water}=0.9956g/mL* 15.00mL=14.934g

Now we have to calculate the moles of water.


\text{Moles of water}=\frac{\text{Mass of water}}{\text{Molar mass of water}}

Molar mass of water = (2 × Molecular weight of hydrogen) + Molecular weight of oxygen

Molar mass of water = (2 × 1.00g/mol) + 16.00 g/mol

Molar mass of water = 18.00 g/mol


\text{Moles of water}=(14.934g)/(18.00g/mol)


\text{Moles of water}=0.8297mol

Therefore, the moles of water present in solution are, 0.8297 moles.

User Beretis
by
8.7k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.