A compound "P"is formed by the combination of one carbon atom and two oxygen atoms. a) Identify the compound P and write its chemical formula. (1) b) Write any one important use of the compound P. (1) c) Write any two properties of compounds. (1)Immersive Reader

a)Carbon (iv) oxide; CO₂

b)It is used in fire extinguishers

c) i. It is denser than air

ii. It dissolves in water to form an acidic solution

Explanation:

a) Since the compound P is composed of one atom of carbon and two atoms of oxygen, the formula of the compound is CO₂. The name of the compound is carbon(iv) oxide.

b) Carbon (iv) oxide is a gas that is of great importance to living organisms. Plants require it for photosynthesis while human produce it during the process of respiration.

Industrially, it is used in carbonated drinks. It is also used in fire extinguishers

c) The properties of Carbon (iv) oxide include the following:

i) it is an odourless colorless gas

ii) it is denser than air

iii) it dissolves in water to form a weak acidic solution, etc.

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o