Q4,
what is the relative molecular mass of air, i need this to determine how fast it diffuses so that i answer this question

the answer is option B. Q, R, P

Explanation: the lightest gas (hydrogen) will diffuse first, then followed by carbon dioxide and then followed by air. Air is a mixture of gases. So air is heavier than hydrogen and carbon dioxide.

28.96 g/mol.

Explanation:

Air is mostly Nitrogen and Oxygen ( in the ratio 4:1) so from the Molecular masses of these 2 gases we get a RMM of 28.96 g/mol.

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).

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i