A) A 25.3 mg sample of sodium carbonate is present in a container.

i) Write the formula of sodium carbonate:

Formula of sodium carbonate is .

Explanation:

Sodium carbonate is an ionic compound consists of and ions.

In a formula unit of sodium carbonate, there should be two ions and one ion to maintain charge neutrality.

In general, formula of an ionic compound consists of and ions is written as : () and AB ()

If x or y is equal to 1 then it is not written explicitly in formula.

So, formula of sodium carbonate =

according to kinetic-molecular theory, the following would not be considered an ideal gas:

a gas at very low volumes, when gas particles are very close together

a gas at very low temperatures, when gas particles have very little kinetic energy a gas

a gas with highly polar molecules that have very strong intermolecular forces

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a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.