Aballoon contains 6.0 moles of helium. a hole lets 4.0 moles of helium escape the balloon. how many atoms of helium remain in the balloon?

a.2.0 atoms
b.1.2 x10^24 atoms
c.6.02 x 10^24 atoms
d.6.0 atoms

Answer : The number of atoms of helium atom remain in the balloon are,

Explanation : Given,

Moles of helium present in balloon = 6.0 mole

Moles of helium escape from balloon = 4.0 mole

First we have to calculate the moles of helium remains in the balloon.

Moles of helium remains in the balloon = Moles of helium present in balloon - Moles of helium escape from balloon

Moles of helium remains in the balloon = 6.0 - 4.0 = 2.0 mole

Now we have to calculate the number of helium atoms remain in the balloon.

As, 1 mole of helium atom remain in the balloon contains number of helium atoms.

So, 2.0 mole of helium atom remain in the balloon contains number of helium atoms.

Therefore, the number of helium atom remain in the balloon are,

d.) circle motion requires a force to give it a centripetal acceleration.