**Contents**show

## How many molecules is 3 moles?

A mole of anything contains 6.022×1023 individual items of that something. You have 3 moles, so there are **3×6.022×1023 oxygen molecules** .

## What is the mass of 2 moles of water?

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**.

## What is the mass of 5 moles H2O?

Five moles of water whould have a mass of **90.05 g**.

## What is a mole of H2O?

H2O Average atomic mass of H: 1.01 g/mol. Average atomic mass of O: 16.00 g/mol. 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**.

## How many atoms are in 3 moles of water?

Calculate the number of gram atoms in 100 ml mercury. Given: Density of Hg=13. 6 g ml−1 and molar mass of Hg=200 g mol−1.

## What is 3 moles O2?

3 moles of Oxygen atoms weigh **48.00 grams**.

## How many grams is 2.5 moles of water?

The amount of oxygen in 2.5 moles of water is **40 grams**. The molecular formula of water is H₂O. 1 mole of water contains 1 mole of oxygen.

## What is the mass of 3 moles of carbon dioxide?

Explanation: Carbon dioxide has a molar mass of 44.01⋅g⋅mol−1 …and so for the mass of a three quantity we take the product… **3⋅mol×**44.01⋅g⋅mol−1≡?? ⋅g …and in this quantity how many moles of carbon, and how moles of oxygen?