How many helium atoms are there in a helium blimp containing 540 kg of helium?

The answer is 8.13 x 10²⁸ atoms.

First we calculate  the number of moles using the molar mass.

molar mass of helium = 4 g/mol. 

it means that 1 mole of helium atoms weighs 4 gram.

Now we have 540 kg of helium =540000 grams

Number of moles in 540000 grams;

540000 / 4 =135000 mol

Now in one mole there is 6.02 x 10²³ atoms

So, in 135000 mol there is;

135000 x 6.02 x 10²³  = 8.13 x 10²⁸atoms

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

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

hope it