Question

One mole of water contains:

(i) How many grams (ii) how many molecules

(iii) how many atoms of hydrogen

(iv) how many atoms of oxygen

(v) how much volume​

Answer 1

Answer:

i. One mole of water contains 6.02214076×1023 molecules, whose total mass is about 18.015 grams and the mean mass of one molecule of water is about 18.015 daltons.

ii. The mole is the SI unit for amount of a substance. Just like the dozen and the gross, it is a name that stands for a number. There are therefore 6.02 × 10 23 water molecules in a mole of water molecules.

iii. & iv. Two water molecules contain 4 hydrogen atoms and 2 oxygen atoms. A mole of water molecules contains 2 moles of hydrogen atoms and 1 mole of oxygen atoms.

v. The volume of one mole of water at 277K is 18ml. One ml of water contains 20 drops.