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.

Similarly, What is the mass of an oxygen atom in grams?

We now know that a hydrogen atom has a mass of 1.6735 x 1024 grams, and that the oxygen atom has a mass of 2.6561 X 1023 grams.

Additionally, Which statement is correct for 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 I calculate moles?

How to find moles?

1. Measure the weight of your substance.
2. Use a periodic table to find its atomic or molecular mass.
3. Divide the weight by the atomic or molecular mass.
4. Check your results with Omni Calculator.

## What is the mass number of oxygen-16?

Oxygen-16 atom is the stable isotope of oxygen with relative atomic mass 15.994914. The most abundant (99.76 atom percent) isotope of naturally occurring oxygen.

## How much does an atom weigh in grams?

Once the relative mass scale was made, later experiments were able to relate the mass in grams of a substance to the number of atoms and an atomic mass unit (amu) was found; 1 amu or Dalton is equal to 1.66 x 1024 grams.

## Which of the following statements is not true one mole of oxygen?

Answer and Explanation: The false statement is: a. One mole of oxygen gas has larger mass than one mole of fluorine gas.

## How many liters are in 1 mole of O2?

The molar volume of an ideal gas is ~22.4 liters per mole (we’ll consider O2 to be an ideal gas for these purposes, and 22.4 is an approximation that varies with temperature, it’s 22.414 at 0C).

## What is the equivalent of 1 mol?

One mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions).

## What is the formula for calculating moles?

Divide the number of grams of each reactant by the number of grams per mole for that reactant. 50.0 g of Na are used in this reaction, and there are 22.990 g/mol. 50.0 ÷ 22.990 = 2.1749. 2.1749 moles of Na are used in this reaction.

## How do you find moles of a compound?

Determining Number of Moles of a Compound With Known Mass

To find the number of moles in a sample, simply weigh it and divide the weight by the molecular weight. The quotient is equal to the number of moles.

## What element has a mass number 16?

The elements of the periodic table sorted by atomic mass

Atomic Mass Name chemical element number
32.065
Sulfur
16
35.453 Chlorine 17
39.0983 Potassium 19
39.948 Argon 18

## What is the mass number of oxygen 18?

Oxygen-18

General
Half-life stable
Isotope mass
17.9991610 u
Spin 0
Isotopes of oxygen Complete table of nuclides

## Why is oxygen 16?

Two isotopes of oxygen. … Because protons and neutrons are roughly equal in mass, an isotope’s number is equal to the sum of its protons and neutrons. Therefore, oxygen 16 has 8 protons and 8 neutrons, oxygen 17 has 8 protons and 9 neutrons, and oxygen 18 has 8 protons and 10 neutrons.

## What is the average weight of an atom?

Atomic mass is defined as the number of protons and neutrons in an atom, where each proton and neutron has a mass of approximately 1 amu (1.0073 and 1.0087, respectively).

## Do atoms weigh?

The total weight of an atom is called the atomic weight. It is approximately equal to the number of protons and neutrons, with a little extra added by the electrons.

## Why is atomic weight in grams?

When interpreted in grams, the atomic weight of an element represents 6.02 × 1023 atoms, which is defined as one mole. Thus, the atomic weight in grams is the mass of an element that contains one mole or 6.02 × 1023 atoms.

## What is wrong with the statement 1 mole of hydrogen?

What is wrong with the statement ‘1 mol of hydrogen’ Ans The statement is not correct. We must always write whether hydrogen is in atomic form or molecular form. The correct statement is : 1mole of hydrogen atoms or one mole of hydrogen molecules . … The atomic mass is the average atomic mass and is generally fractional.

## Which one of the following represent one mole of the substance?

It is defined as the number of elementary particles such as molecules, atoms, compounds, etc. per mole of a substance. – Or in other words, the number of units in one mole of any substance is called Avogadro’s number or Avogadro’s constant. Its value is given as 6.023×1023.

## What is number of mole?

The mole is a measure or the base unit for the amount of substance present in the given sample. 1 mole is number which is equal to 6.022 x 1023 particles, also known as the Avogadro’s constant.

## How many moles are in a liter?

Molar volume at STP can be used to convert from moles to gas volume and from gas volume to moles. The equality of 1mol=22.4L is the basis for the conversion factor.

## How do you convert mol to L?

Converting from moles to volume (liters): Multiply your mole value by the molar volume constant, 22.4L. Converting from particles (atoms, molecules, or formula units) to moles: Divide your particle value by Avogadro’s number, 6.02×1023.

## How many moles is 3l of O2?

3 L x 1 mole/22.4 L = 0.134 moles O2 gas.