If one mole of carbon atoms weighs 12grams, what is the mass (in grams) of 1 atom of carbon?

Question

Asked by Vishal kumar | 2 years ago | 228

0 0

Class 9 Science Atoms and Molecules Add Answer

Calculate the number of aluminium ions present in 0.051g of aluminium oxide.

(Hint: The mass of an ion is the same as that of an atom of the same element. Atomic mass of Al = 27u)

Class 9 Science Atoms and Molecules View Answer

Calculate the number of molecules of sulphur (S8) present in 16g of solid sulphur.

Class 9 Science Atoms and Molecules View Answer

What is the mass of:

(a) 0.2 mole of oxygen atoms?

(b) 0.5 mole of water molecules?

Class 9 Science Atoms and Molecules View Answer

Convert into mole.

(a) 12g of oxygen gas

(b) 20g of water

(c) 22g of carbon dioxide

Class 9 Science Atoms and Molecules View Answer

What is the mass of -

(a) 1 mole of nitrogen atoms?

(b) 4 moles of aluminium atoms((Atomic mass of aluminium =27)?

(c) 10 moles of sodium sulphite (Na₂SO₃)?

Class 9 Science Atoms and Molecules View Answer

Accepted Answer

Given: 1 mole of carbon weighs 12g

1 mole of carbon atoms = 6.022 X 10²³

Molecular mass of carbon atoms = 12g = an atom of carbon mass

Hence, mass of 1 carbon atom = 12 / 6.022 X 10²³ = 1.99 X 10^-²³g

Answered by Shivani Kumari | 2 years ago