How many moles are there in 23 grams of sodium?

Answer 1

First of all, we should know what a mole and molar mass of an element means. Then answering this question would be easy.

Mole is a number( like pi, 1, 2, etc.). It is approximately 6.0225 *1023 . 1 mole of anything is same as the number of atoms in 12 grams of Carbon C12 sample. The mass of mole of an element/compound is called it's molar mass expressed in grams. The molar mass of a monoatomic element is equal to it's mass number.

So, we know Ca's mass number = 40.

that means 1 mole of Ca weighs 40 grams.

=>1/40 mole of Ca weighs 1 gram.

=>(1/40)*23 moles of Ca weighs 23.0 gram.

=>0.575 moles of Ca weighs 23.0 gram.

So there are 0.575 moles of Ca atoms in 23.0g of Ca

Answer 2

1 mole Ca = 40.078g

30.0g Ca x 1mol/40.078g = 0.749mol Ca

Answer 3

24 g calcium is equivalent to 0,6 moles.

Answer 4

There are approximately 1 mole of sodium in 23 grams of sodium. Sodium has a molar mass of about 23 grams per mole, so 23 grams is equal to 1 mole.

Answer 5

26,0 g of Ca equal 0,649 moles.

Answer 6

1 mole