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One mole of oxygen gas, which has the formula O2, has a mass of 32 g and contains 6.02 X 1023 molecules of oxygen but 12.04 X 1023 (2 X 6.02 X 1023) atoms, because each molecule of oxygen contains two oxygen atoms.

## What is the mass of 1 mole of gas?

The mass of one mole (molar mass) of helium gas is 4.002602 g/mol .

## Is O2 mass 16 or 32?

O_{2} is a diatomic molecule. The mass of an oxygen atom = 16 amu. ∴ Mass of O_{2} molecule = 2 × 16 = 32 amu.

## What is the mass of 1 mole of gas at STP?

Because the density of the gas is less than 1 g/L, the molar mass is less than 22.4 g/mol.

## What’s the molar mass of oxygen?

We now know that a hydrogen atom has a mass of 1.6735 x 10^{–}^{24} grams, and that the oxygen atom has a mass of 2.6561 X 10^{–}^{23} grams.

## How do you calculate 1 mole of oxygen?

Calculate the number of oxygen atoms in 1 mole of O2. Solution — 1 molecule of O2 = 2 oxygen atoms So, 1 mole of O2 = 2 mole oxygen atoms = 2 × 6.022 × 1023 = 12.044 ×1023 oxygen atoms.

## How do you find mass at STP?

The formula D= M/V is used at STP with M being equal to the molar mass and V being molar volume of a gas (22.4 liter/mole). Recall Avagadro’s Principle for Gases (1811)- equal volumes of all gases at the same condition contain the same number of molecules. Molar mass can also be solved based on given information.

## How many liters does 1 mole of gas occupy at STP?

More specifically, 6.02 x 10^{23} particles (1 mole) of ANY GAS occupies 22.4 Liters at STP. No matter what gas it is!

## What is the mass of 1.00 mol of oxygen o2?

The mass of oxygen equal to one mole of oxygen is 15.998 grams and the mass of one mole of hydrogen is 1.008 g.

## How many moles are in oxygen gas?

One mole of oxygen gas, which has the formula O_{2}, has a mass of 32 g and contains 6.02 X 10^{23} molecules of oxygen but 12.04 X 10^{23} (2 X 6.02 X 10^{23}) atoms, because each molecule of oxygen contains two oxygen atoms.

## What is the mass of 3 moles of oxygen gas o2?

3 moles of Oxygen atoms weigh 48.00 grams.