Question

Plz can anyone help me in this question. plz it is urgent​

Answer 1

Answer:

Gas-forming reactions

CaCO3(s) + 2 HCl(aq) → CaCl2(aq) + CO2(g) + H2O (l) In this equation, the symbol (aq) signifies that a compound is in an aqueous, or water, solution.

Answer 2

Answer:

ya

Explanation:

a) calcuim+water gives rise to calcium hydroxide+hydrogen

b) Hydroxide