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## How many moles make up 90g of water?

From this you can see that **5 moles** of hydrogen gas would react with 2.5 of the available 3 moles of oxygen gas, to form 5 moles of water. The molar mass of water is 18 g/mol, so you would end up with 5 x 18 = 90 g of water.

## How many molecules are in 90 grams of H2O?

Hence 90 g of water will contain **30.11×10^(23) molecules**.

## How many atoms are in 90 grams of H2O?

The number of molecules in a mole is always the same number, called Avogadro’s number, which is 6.02 X 10 to the power of 23. So in 90g of H2O there are 5*6.02 X 10**23 = 30.10 X 10**23 = **3.010 X 10**24 molecules of H2O**, and that is also the number of oxygen atoms. Mark me as a Brainlist.

## How many molecules are there in 90 gram water?

**6×1023**.

## How many moles are in H2O?

The average mass of one H2O molecule is 18.02 amu. The number of atoms is an exact number, the number of mole is an exact number; they do not affect the number of significant figures. The average mass of **one mole** of H2O is 18.02 grams. This is stated: the molar mass of water is 18.02 g/mol.

## How many moles is 90 grams?

hence 90 g of H20 contains **5 moles**.

## How many electrons are present in 90g of water?

For each water molecules (H2O), there is 10 electrons: 8 for the oxygen and one for each hydrogen (there are sharing the electrons but at the end it is neutral so we can count the protons and not care about the details of the chemistry). At the end, in 90 g of pure water, we have something close to **5 x 10^25 electrons**.

## What will be the total number of electrons in 90g of water?

Explanation: =>Total electrons in 90 g H2O=10×5×6. 022×1023=**50×6**.

## How many moles does NaOH have?

Determining the Molar Mass of a Compound

The molar mass of the compound NaOH is **40 g/mol**.