Carbon has a relative atomic mass of 12 and oxygen has a relative atomic mass of 16. A sample of 6 g of carbon has twice as many atoms as

It seems like your question got cut off. However, I can start answering based on the information given.

The number of atoms in a sample can be calculated using the formula:

Number of atoms = (Amount in grams / Relative atomic mass) x Avogadro's number

Avogadro's number is a constant, approximately 6.022 x 10^23, which represents the number of atoms in one mole of a substance.

First, let's calculate the number of atoms in the 6g of carbon:

Number of carbon atoms = (6g / 12) x 6.022 x 10^23 = 3.011 x 10^23 atoms

According to the problem, this is twice the number of oxygen atoms in the sample. Therefore, the number of oxygen atoms is half of this, or 1.506 x 10^23 atoms.

To find the mass of oxygen that this represents, we can rearrange the formula to:

Amount in grams = (Number of atoms / Avogadro's number) x Relative atomic mass

Substituting the values in:

Amount of oxygen = (1.506 x 10^23 / 6.022 x 10^23) x 16 = 4g

So, the sample contains 4g of oxygen.