WILL MARK BRAINLIEST
How many moles of helium atoms are there in 4.0 x 1024 helium atoms?

There are 6, 64 moles of helium atoms.

Explanation:

We use Avogadro's number, according to which in 1 mole of any substance there are 6,023 x 10 e23 particles (example: atoms, molecules). We calculate the number of moles according to the following simple three rule:

6,023 x 10 e23 atoms1 mol Helium

4.0 x 10e 24 atomsx=

x= (4.0 x 10e 24 atomsx1 mol Helium)/6,023 x 10 e23 atoms=

x=6, 64 moles of Helium

calculate how many grams of ammonia can be produced from 4.21 grams of

n2 + 3h2 = 2nh3

my answer:

25.0g n2 x (1 mol/ 28.0gn2) x (2 mol nh3/ 1 mol n2) x (17.0g nh3/ 1 molnh3) = 30.36g n2

25.0g h2 x (1 mol h2/ 2.00g h2) x (2 mol nh3/ 3 mol h2) x (17.0g nh3/ 1 mol nh3) = 141.67g h2

lr = n2

the answer your looking for is c).