Writing Chemical Formulae of Compounds

Write the chemical formula of the calcium phosphate.

An element $\mathrm{X}$ has a valency of $4$. Write the formula of its nitrate.

An element $\mathrm{X}$ has a valency of $4$. Write the formula of its carbonate.

An element $\mathrm{X}$ has a valency of $4$. Write the formula of its sulphate.

An element $\mathrm{X}$ has a valency of $4$. Write the formula of its oxide.

Write the numerical value of '$\mathrm{x}$' in the chemical formula for potassium sulphate given:

${\mathrm{K}}_{\mathrm{x}}{\mathrm{SO}}_4$

Write the chemical formula of the magnesium hydroxide.

A. $\mathrm{Mg}{\left(\mathrm{OH}\right)}_3$

B. $\mathrm{MgOH}$

C. $\mathrm{Mg}(\mathrm{OH}{)}_2$

"Enter your correct answer as A, B or C."

The chemical formula of the sodium oxide is-

A. $\mathrm{NaO}$

B. ${\mathrm{Na}}_2\mathrm{O}$

C. ${\mathrm{NaO}}_2$

"Enter your correct answer as A, B or C."

The chemical formula of the carbon disulphide is-

A. ${\mathrm{CS}}_2$

B. $\mathrm{CS}$

C. ${\mathrm{C}}_2\mathrm{S}$

"Enter your correct answer as A, B or C."

The chemical formula of the sulphur trioxide is-

A. $\mathrm{SO}$

B. ${\mathrm{SO}}_2$

C. ${\mathrm{SO}}_3$

"Enter your correct answer as A, B or C."

The chemical formula of methane is-

A. ${\mathrm{C}}_2{\mathrm{H}}_4$

B. ${\mathrm{CH}}_4$

C. ${\mathrm{C}}_2{\mathrm{H}}_2$

"Enter your correct answer as A, B or C."

The chemical formula of the carbon dioxide can be-

A. $\mathrm{CO}$

B. ${\mathrm{CO}}_2$

C. ${\mathrm{C}}_2{\mathrm{O}}_3$

"Enter your correct answer as A, B or C."

An element $\mathrm{X}$ has a valency of $4$. Write the formula of its chloride.

If the aluminium salt of an anion $\mathrm{X}$ is ${\mathrm{Al}}_2{\mathrm{X}}_3$, what is the valency of $\mathrm{X}$? What will be the formula of the magnesium salt of $\mathrm{X}$?

The formula of carbonate of a metal $\mathrm{M}$ is ${\mathrm{M}}_2{\mathrm{CO}}_3$. What will be the formula of its chloride?

An element $\mathrm{A}$ of valency $3$ combines with another element $\mathrm{B}$ of valency$2$. What will be the formula of the compound formed?

An element has  $\mathrm{X}$ has a valency of $4$, while another element $\mathrm{Y}$ has a valency of $1$. What will be the formula of the compound formed between $\mathrm{X}$ and $\mathrm{Y}$?

If the valency of nitrogen is $3$ and that of hydrogen is $1$ , write down the formula for ammonia.

An element $\mathrm{M}$ has a valency of $2$. What will be its simplest formula for bromide of the element?

An element $\mathrm{M}$ has a valency of $2$. What will be its simplest formula for oxide of the element?