Question

Calculate the number of moles for the following

a. 52 grams of Helium.(finding mole from mass)

b. 12.044×10²³ number of helium atoms( finding mole from number of particles)​

Answer 1

Answer:

a) Atomic weight of helium = 4

therefore one mole of helium = 4g

therefore number of moles in 52 gram of helium

= 52/4

= 13moles

b) one mole = 6.022 × 10²³ atoms.

hence 2 moles = 12.044 × 10²³ atoms..

hence the answer is 2 moles of helium = 8g of He.

Hope it helped :)

Answer 2

Answer:

a. Atomic weight of helium = 4

Therefore one mole of helium = 4g

Therefore the number of moles in 52 gram of

helium = 52/4

=13.

b. One mole = 6.022 × 10²³ atoms.

Hence 2 moles = 12.044 × 10²³ atoms.

Hence the answer is 2 moles of helium = 8 g of

He.

I hope it helps you.