Question

Convert 7.1 grams of potassium to atoms.

Answer 1

In 7.1g of potassium, there are 1.09 * 10^23 atoms

Step-by-step explanation:

HERE, we want to get the number of atoms on 7.1g of potassium

The first thing we have to do here is to convert the given mass to moles

We can do this by dividing the mass by the atomic mass unit of potassium

The atomic mass unit of potassium is 39.1 amu

We can get the number of moles mathematically as follows:

`(7.1)/(39.1)\text{ = 0.1816 moles}`

Finally,we can get the number of atoms

In 1 mole of a substance, the number of atoms is:

`6.02\text{ }*10^{23\text{ }}\text{ atoms}`

To get the number of atoms in 0.1816 mole, we simply multiply the two as follows:

`0.1816*\text{ 6.02}*10^(23)\text{ = 1.09 }*10^(23)\text{ atoms}`