Which of the following is the number of hydrogen atoms in a mole of hydrogen gas at STP? pls i need help quickly a) 22.4
b) 1.008
c) 1.20 * 10^24
d) 6.02 * 10^23
e)2.016

C

Explanation:

The number of particles of any kind in 1 mol is 6.02*10^23.

How you modify that depends on the units.

The number of molecules in 1 mole of hydrogen is 6.02*10^23 molecules.

Each molecule consists of 2 atoms. Pure hydrogen at STP will have a multiplier of 2.

So the number of atoms is 2*6.02 * 10^23 = 1.20 * 10^24 atoms.

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.