Water(H2O) has a molecuar mass of 18, this means it weights 18 g per mole. A mole is 6.0221415*1023molecules (Avogadro’s number). If you have 1 g of water, you therefore have 1/18 of a mole, or 3.34*1022 molecules.

## How many molecules are in 9g of H2O?

Answer. = 3. 011 x 10^23.

## How many moles are in 10g of water?

10/18 moles = 10/18 * 6 * 10^23 number of molecules = 3.33 * 10^23 molecules of water. Each molecule of water has 3 atoms, so the total number of atoms in 10g of water is 3*3.33*10^23 = 10^24.

## How many moles are in a gram of H2O?

The SI base unit for amount of substance is the mole. 1 grams H2O is equal to 0.055508435061792 mole. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between grams H2O and mole.

## How many electrons are in 9 grams of H2O?

So 9g of water will be half of a mole. 1 mole of any substance contains 6 X 10 ^ 23 molecules. So half a mole will have about 3 X 10 ^23 molecules . Each molecule of water has ( 8 + 1+1) 10 electrons.

## What is the mole of 12 gram of oxygen gas?

Therefore, 12 g of oxygen gas has 0.375 moles.

## Is Avogadro’s Number?

Avogadro’s number is defined as the number of elementary particles (molecules, atoms, compounds, etc.) per mole of a substance. It is equal to 6.022×1023 mol-1 and is expressed as the symbol NA. Avogadro’s number is a similar concept to that of a dozen or a gross.

## How many moles is 25 grams of water?

Hence, 1.38 moles (mol) are present in 25 grams of water.

## How many moles are in 50 grams of water?

1 Answer. There are 3 moles of O in 50 g.

## How many grams are in 10 moles of H2O?

›› More information from the unit converter

You can view more details on each measurement unit: molecular weight of 10 H2O or grams The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles 10 H2O, or 28.01528 grams. Note that rounding errors may occur, so always check the results.

## How many moles does H2O have?

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 grams are in 2 moles of H2O?

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 moles are present in 9 gram of water?

Water(H2O) has a molecuar mass of 18, this means it weights 18 g per mole. A mole is 6.0221415*1023molecules (Avogadro’s number). If you have 1 g of water, you therefore have 1/18 of a mole, or 3.34*1022 molecules.

## How many atoms are in 9 grams of water?

9 is 1/2 of 18, meaning that 1/2 mole is present in 9 g of water. 1/2 * 6.022 *10^23 = 3.011 * 10^23 molecules H2O. However, if you want to know how many ATOMS are present in 3.011 *10^23, you must then multiply by 3 (2 hydrogen atoms and 1 oxygen atom per molecule), and get 9.033 * 10^23 atoms.

## How many molecules of water are in 50 ml of water?

Answer. Answer: 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.

## How many molecules are there in 22 grams of CO2?

(Mr of carbon dioxide is (2*16)+12=44 Now times by Abogadros constant: 1* 6.022*10^23=6.022*10^23 molecules of CO2 are present.