How many moles are present in 4 grams of O2?

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How many moles is 4.00 grams of O2?

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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 moles of oxygen atoms are present in 4.0 g of the gas?

First, we need to calculate the molar mass of oxygen gas. Oxygen gas is O2 . O2 has a molar mass of 32g/mol . ∴ There are 1.25 moles of O2 in 40g of oxygen gas.

How do I calculate moles?

So in order to calculate the number of moles of any substance present in the sample, we simply divide the given weight of the substance by its molar mass. Where ‘n’ is the number of moles, ‘m’ is the given mass and ‘M’ is the molar mass.

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Which contains more molecules 4 gram of methane ch4 4 gram of oxygen o2?

We already know the molecular mass of methane is 16 and the molecular mass of oxygen is32. Hence the number of molecules of methane is twice the number of molecules of oxygen.