Answer:
A. 100 g of this solution contains 39 g of phosphoric acid
Explanation:
The formular for percentage by a mass id usually given as;
( Mass of element / Mass of compound ) * 100%
So when a solution contains 39% by mass of phosphoric acid, it means that in 100 units of the solution, there are 39 units of phosphoric acid.
The only option that satisfies this is option A. 100 g of this solution contains 39 g of phosphoric acid
Hydrophilic substances will dissolve better in water than hydrophobic substances. A substance that is hydrophilic is water loving or easily dissolved in water. Molecules of these substances form ionic bonds with the water molecules. Hydrophilic substances include alcohols. Hydrophobic substances repel water and do not mix.
Answer:
Explanation:
Carbon disulphide is the liquid that can be used to separate iron fillings and sulphur powder.
When carbon disulphide is poured into the dish, the sulphur powder gets easily dissolved in the carbon disulfide. The iron fillings are left to settle on the bottom of the dish.
The iron fillings can get seperated through filtration. When the mixture of sulphur powder and carbon disulphide gets completely evaporated, the sulphur powder is left over.
Answer:
They are Weaker than a chemical
<h2>bond</h2>
corrected by the one in the comment section
It is False because from their chemical formulae.
