# Blog

## What is the mass of a molecule of water in KG? ## What is the mass of water molecule in gram?

molecular mass of one water molecule = 2×(1)+16. = 18 g/mol. Mass of the water molecule in gram = 18/ 6.022×1023. =2.988×10−23g.

## How do you calculate the mass of water?

Molar mass of atoms

Mass of two moles of Hydrogen atoms = 2x 1 g/mol = 2 g/mol. On adding all the above-obtained values we get, Mass of one mole of water = 2 g/mol + 16 g/mol = 18 g/mol.

## How do you find the mass of a molecule?

The molecular mass. of a substance is the sum of the average masses of the atoms in one molecule of a substance. It is calculated by adding together the atomic masses of the elements in the substance, each multiplied by its subscript (written or implied) in the molecular formula.Jul 29, 2021

## What is the mass of 2 mol of H2O?

One mole of H2 O is made up of 2 moles of Hydrogen atoms and 1 mole of Oxygen atom. Mass of two moles of Hydrogen atoms = 2x 1 g/mol = 2 g/mol. Mass of one mole of water = 2 g/mol + 16 g/mol = 18 g/mol.Oct 27, 2015  ### What is the mass of 5 molecules of water?

Since one mole of water is made of two moles of Hydrogen (1.01 g/mol) and one mole of Oxygen (15.99 g/mol) its mass would be 18.01 g. Five moles of water whould have a mass of 90.05 g. One molecule of water weighs 18 AMU.Aug 1, 2020

### What is the mass of 5 gram molecular mass of H2O?

∴ 5 gram-moleular mass of water = 18 g x 5 = 90 g.

### How do you calculate water molecules?

Avogadro's number tells us there are 6.022 x 1023 molecules 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 = (6.022 x 1023 molecules/mole) x 0.002275 moles.
Aug 27, 2019

### How do you find the mass?

One way to calculate mass: Mass = volume × density. Weight is the measure of the gravitational force acting on a mass. The SI unit of mass is "kilogram".

### How do you calculate mass number?

Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number.

### How many molecules are there in H2O?

4 hydrogen atoms and 2 oxygen atoms are found in two water molecules.

### What is the approximate size of a water molecule?

• The diameter of a water molecule (H2O) is closely calculated to be about 0.000282 µm (micrometers – millionths of a meter) in diameter.

### What is the approximate mass of one water molecule?

• 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 average mass of one molecule. 2) Divide the substance's molar mass by Avogadro's Number.

### How do you calculate the mass of water?

• Calculate the density by dividing the mass by the volume. Using the equation density = mass/volume, you can determine the density of water. Plug in the values of mass and volume you determined and solve.

### What is the average volume of a water molecule?

• The average volume of a water molecule must therefore be 2.99x10- 23 cm3, and if we assume the molecules to be spherical the diameter of a water molecule is about 2x10-8 cm or 2x10-10 m, a result confirmed by X-ray diffraction.