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## How many moles of atom are there in 1 mole of CaCO3?

mole of CaCO3 = 50g/100g = 0.5 0.5 mole of CaCO3 contains **1.5 moles** of oxygen atoms No. of oxygen atoms = 1.5 × 6.022×1023 = 9.033×1023 atoms Mass of Oxygen atoms = 1.5 × 16 = 24 g. Question 9. Calculate the number of atoms of each element in 122.5 g of KClO3.

## How many atoms are in 1 mole of calcium atoms?

In one mole of calcium there are **6.022 x 10^ 23 atoms**.

## What is the molarity of CaCO3?

The molarity of a calcium carbonate (molar mass = 100. g/mol) solution is **2.4 x 10 ^-3** .

## How many moles of oxygen O are in 1 mole of calcium carbonate CaCO3?

A mole of CaCO3 (calcium carbonate) has one mole (Avogadro number) of Ca atoms, one mole of C atoms and **3 moles** of O atoms.

## How many atoms of chlorine are in 1 mole of chlorine gas?

One mole of chlorine weighs 70 grams. Just like a dozen equals twelve, a mole equals Avogadro’s number of atoms or **6.02 × 10 ^{23}**. 6.02 × 10

^{23}molecules of hydrogen would weigh 2 grams. An equal number of chlorine molecules would weigh 70 grams.

## How many carbon atoms are there in 0.5 moles of c2h4?

One mole of carbon contains 6.022×10²³ atoms of carbon. So, 0.5 mol of carbon will contain 6.022×12²³/2 = **3.011×10²³ atoms**.