What is the total number of atoms contained in 2.11 moles of nickel?

1.27 × 10²⁴ atoms of nickel are contained in 2.11 moles of nickel. For every mole of a substance there are 6.022 × 10²³ representative particles of that substance. The amount of particles in one mole of substance is called Avogadro's number.

To convert from the number of moles to number of representative particles, the formula below may be used:

For this problem, the number of nickel atoms can be determined by plugging in the given values in the equation above:

Since the given only has three significant figures, the final answer with the correct number of significant figures is:

Keywords: moles conversion, Avogadro's number

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

the answers would be

the first one and the second one