Question

What is the chemical formula for
Magnesium oxide
Copper sulphate
Potassium iodide
Zinc carbonate
Barium nitrate ​

Answer 1

Answer:

(a) Potassium bromide(aq) + Barium iodide(aq) → Potassium iodide(aq) + Barium bromide(s)

2KBr(aq)+BaI2(aq)→2KI(aq)+BaBr2(s)

In this reaction, both the reactants exchanges ions to for two new products, hence, it is a double displacement reaction

(b) zinc carbonate(s) → Zinc oxide(s) + Carbon dioxide(g)

ZnCO3(s)→ZnO(s)+CO2(g) 

In this reaction, a single substance yields two different product. hence, it is a decomposition reaction

(c) Hydrogen(g) + Chlorine(g) → Hydrogen chloride(g)

H2(g)+Cl2(g)→2HCl(g) 

In this reaction, two different reactants react with each other to form a single product. Hence, it is called a combination reaction

(d) Magnesium(s) + Hydrochloric acid(aq) → Magnesium chloride(aq) + Hydrogen(g)

Mg(s)+2HCl(aq)→MgCl2(aq)+H2(g)

In this reaction, more reactive Mg is replacing less reactive H. Hence, it is displacement reaction

Answer 2

Explanation:

1. The chemical and molecular formula of magnesium oxide is MgO.

2. Copper(II) sulfate, also known as copper sulphate, are the inorganic compounds with the chemical formula CuSO4(H2O)x, where x can range from 0 to 5.

3. KI is the chemical formula for potassium iodide

4.ZnCO₃ is the chemical formula for zinc carbonate.

5.Ba(NO3)2 is the chemical formula for barium nitrate.