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

= **0.5 Moles** of H2O .

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

= **3.** **011 x 10^23**.

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

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 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 h2o molecules are in a 9 g sample of water?

The number of H_{2}O molecules in a 9.00-g sample of water is **3.01×10 ^{23} H_{2}O molecules**.

## How much is a mole?

A mole is defined as **6.02214076 × 10 ^{23} of some chemical unit**, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

## How many moles is 17g of water?

Hence 17 gm of H2O2 = 1/ 34 ×17 = 1/ 2 = **0.5moles**.

## How many atoms are in 1g of water?

Explanation: Thus, there are 3.35 * 10^22 molecules of water in 1 gram. Now, each molecule of water has 2 hydrogen atoms and 1 oxygen atom. This means that there are **3 atoms** in each molecule.

## How many moles of electrons weigh 1kg?

Or, 1 kg will contain = $dfrac{1}{{9.108 times 6.022}} times {**10^8}$ moles** of electrons. Thus, $dfrac{1}{{9.108 times 6.022}} times {10^8}$ moles of electrons will weigh one kilogram. So, the correct answer is “Option D”.