Question

Which of the following is/are true with respect to carbon -12.
(a) relative atomic mass is 12 u
(b) oxidation number of carbon is +4 in all its compounds.
(c) 1 mole of carbon-12 contain 6.022 1022 carbon atoms.
(d) all of these

Answer 1

Final Answer : All are False

1) Relative Atomic Mass of an atom has no units
as it given with reference to mass of an Hydrogen atom.
So, Relative Mass of Carbon is 12 .

2) Oxidation number of carbon vary with compounds.
Example : Oxalic Acid H2C2O4
Here, Oxidation Number of Carbon is +3 .

3) 1 mole of Carbon atom contains Avogadro Number of Particles /atoms = 6.022 * 10^(23 )

Answer 2

Answer:relative atomic mass is 12u

Explanation:

Relative atomic mass of carbon is 12

For example, consider CH4

C=1×12

H=4×1

Therefore relative atomic mass of carbon is 12