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## How many moles are present in 4 grams of O2?

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 * 10^23 = 7.52 * 10^22.

## How many moles are in 4 grams?

If there are 2g dyhydrogen per mole, and we have 4g, then we know 4g / 2g per mole = 2 mole dihydrogen in 4g. To convert between moles and number of molecules or atoms, you need to use Avogadro’s number, which is 6.022^{23}, or 6 with 23 zeros.

## How many moles are in O2?

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 number of oxygen atoms are present in 4 grams of oxygen?

We know that 32g of oxygen contain 6.022 × 10^{23} molecules. Hence, 4g of oxygen have 7.52 × 10^{22} molecules.

## How many atoms of oxygen are present in 4 moles of oxygen?

For one mole atoms of oxygen mass of [{text{N}}{{text{O}}_2}] will be [23{text{ g}}] and for 4 moles it will be [4 times 23{text{ g}} = 92{text{ g}}]. Hence 4 moles of oxygen atoms are present in 92 g of [{text{N}}{{text{O}}_2}]. Thus, option B is the correct answer.

## How many moles are there in 50.0 g of o2?

To calculate the weight of an element in grams to moles, we should know the molar mass of an element. For example, 50 grams of oxygen is equal to 3 moles.

## How many moles of o2 are in 48 g o2?

48 g of individual oxygen atoms = 3 moles of oxygen atoms.

## What is the molar mass of o2?

Since, the given sample contains hydrogen gas, we must consider the molecular structure of hydrogen, i.e. molecular mass = 2 amu. Hence the weight of one mole of hydrogen gas is 2 grams. Since the given sample weighs 4 grams, we can say that the number of moles of hydrogen present is 2 moles.

## How many grams is a mole?

The mass of one mole of a substance is equal to that substance’s molecular weight. For example, the mean molecular weight of water is 18.015 atomic mass units (amu), so one mole of water weight 18.015 grams.

## How many moles of oxygen are in CO2?

A mole of CO2 molecules (we usually just say “a mole of CO2”) has one mole of carbon atoms and two moles of oxygen atoms. The atom ratio and the mole ratio of the elements are identical! 1-).

## How many grams are in 3.5 moles of oxygen?

So,3.5 moles of oxygen has mass=3.5×16=56grams.

## How many moles are in CO2?

Molar Masses of Compounds

One mole of carbon dioxide molecules has a mass of 44.01g, while one mole of sodium sulfide formula units has a mass of 78.04g. The molar masses are 44.01g/mol and 78.04g/mol respectively.