2. How many moles of carbon dioxide are there in 1.34 x1021 molecules of CO,?

0.00223mol

Explanation:

The number of molecules of CO2 (nA) can be used to determine the number of moles it contain by dividing by Avagadros number (6.02 × 10^23 atoms)

That is;

number of moles (n) = nA of CO2 ÷ 6.02 × 10^23

According to this question, there are 1.34 x10^21 molecules of CO2, hence,

n of CO2 = 1.34 x10^21 ÷ 6.02 × 10^23

n = 1.34/6.02 × 10^21-23

n = 0.223 × 10^-2

n = 0.00223mol of CO2

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).