# Frequent question: How many moles are present in 4 00 grams of o2?

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## How many moles are in 4.00 grams of O2?

Since oxygen has an atomic mass of 16 g/mole, the molar mass of oxygen gas (O2) is 2 x 16 g/mole = 32 g/mole. Since 1 mole of oxygen is equivalent to 32 g, 4 moles of oxygen gas would be equivalent to 4 moles x 32 g/mole = 128 g. Thus, 4 moles of oxygen gas (O2) would have a mass of 128 g.

## How many moles are in 4g of oxygen?

To calculate the number of molecules in 4g of oxygen, we have, Moles of oxygen = 4/32 = 0.125mol, Molecules of oxygen = 0.125 * 6.022 * 1023 = 7.52 * 1022.

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## How many carbon atoms are in 4 moles?

So, 1 mole of carbon contains 6. 022×10^23 carbon atoms. So, 4 mole of carbon element contains 4×(6. 022×10^23) carbon atoms.

## How many molecules are in 4 moles?

– So, the no of atoms in 4 moles of helium is 2.4088 × 10²⁴.