# What is the molecular weight of water in Daltons?

Molecular Weight and the Mole. The weight of a molecule is the sum of the weights of the atoms of which it is made. The unit of weight is the dalton, one-twelfth the weight of an atom of

^{12}C. Thus the molecular weight (MW) of water is**18 daltons**.A.

### How do you find the molecular weight?

Go to periodic table and

**determine**the atomic mass average (atomic**weight**) of each element. Multiply each atomic mass by the number of atoms in the**formula**. Add up the results of step three: 2.015+32.066+63.998 = 98.079 = molar mass of sulfuric acid.#### What is the gram molecular weight?

The mass, in**grams**, of 1 mole of a**molecular**compound is called the**gram**-**molecular weight**. It is numericaly equal to the**molecular weight**.#### How do you find molecular weight of a gas?

To determine the**molecular weight of a gas**, we measure the volume, temperature, and pressure of a known**mass of**a**gas**. We can use the Ideal**Gas**Law to calculate the number of moles of**gas**we have, and then divide this number into the**mass**to get the**molecular weight**.#### How do you go from grams to moles?

**There are three steps to converting grams of a substance to moles.**- Determine how many grams are given in the problem.
- Calculate the molar mass of the substance.
- Divide step one by step two.

B.

### What is the mass of a molecule of water?

Question: The gram molecular mass of water is

**18 grams per mole**. This isbecause a water molecule contains t The gram molecular mass of water is**18 grams per mole**. This isbecause a water molecule contains two hydrogen atoms (one protoneach) and one oxygen atom (8 protons and 8 neutrons), for a totalof 18 nucleons.#### What is the mass of a molecule of water?

The gram molecular mass of water is**18 grams per mole**. This isbecause a water molecule contains two hydrogen atoms (one protoneach) and one oxygen atom (8 protons and 8 neutrons), for a totalof 18 nucleons. Avogadro's number is the number of water moleculesneeded to obtain a mass of 18 grams.#### What is the volume of a molecule of water?

The number of moles in**1 litre**= 1000 / 18.02 = 55.5 moles. 1 mole of water =**6.022 x 10**^23 molecules of water, So 55.5 moles of water = 55.5 x**6.022 x 10**^23 = 3.34 x 10^25 molecules of water. The gram molecular mass of water is 18.02. Thus volume occupied by 1 H2O molecule is ?2.99 ?×**10-23 ml**.#### What is the correct molar mass of ag3po4?

8.

what is the correct molar mass of Ag3PO4.

**418.58 g/mol**.

the percentage compostion of a compound is.

C.

### How much does a molecule of water weigh?

Step #1 - the molar mass of water is

**18.015 g**/mol. This was calculated by multiplying the atomic weight of hydrogen (1.008) by two and adding the result to the weight for one oxygen (15.999). Please remember that you need the molar mass first when trying to find the mass of one molecule.#### How many moles of water are there in 18 g of water?

It is equal to Avogadro's number (NA), namely**6.022**x10^{23}. If we have**one mole**of water, then we know that it will have a mass of 2 grams (for**2 moles**of H atoms) +**16**grams (for**one mole**O atom) = 18 grams.#### How many molecules are in the water?

Avogadro's number tells us there are**6.022**x**10**of water per mole of water. So, next we calculate how many molecules there are in a drop of water, which we determined contains 0.002775 moles: molecules in a drop of water = (^{23}molecules**6.022**x**10**/mole) x 0.002275 moles.^{23}molecules#### What is the molarity of water?

The molecular weight of**water**is: 18.02 g/mol. The density of**water**is 1 g/ml. Therefore 1 litre of**water**(1,000 ml) would weigh 1,000 g. The**molarity**of something is the number of moles of that thing per 1,000 ml volume.

Updated: 6th October 2019