The % composition of each element is calculated as follows
= mass of the element/total mass x100
total mass= 73.5+4.2+72.3=150
% composition of C = 73.5/150 x100=49%
% composition of H= 4.2/150 x100= 2.8%
%composition of Cl= 72.3/150 x100= 48.2%
An ionic compound is a chemical compound of ions held together by electrostatic forces termed ionic bonding
EXAMPLE -/Sodium chloride ,NaCl with Na+and Ci- ions
1 Which best defines concentration?A ratio that describes the amount of solute divided by the amount of solvent or solutionB ratio that describes the amount of solvent or solution divided by the amount of solute C ratio that describes the mass of solute divided by the mass of solvent D ratio that describes the amount of solvent in a solution
ANSWER: (A) ratio that describes the amount of solute divided by the amount of solvent or solution
2 Which contributes to the dissolution of sugar in water?A the dissociation of an ionic compound in waterB a strong pull of water molecules on an ionic compoundC the dissociation of a polar covalent compound in waterD a strong pull of water molecules on a polar covalent compound
ANSWER: (D) a strong pull of water molecules on a polar covalent compound
Answer:
The candle ran out of oxygen
Explanation:
There is a concept known as the fire triangle, the three things present for a fire to start and burn. Heat, Oxygen, Fuel. Take any one of the three away and the fire goes out. Pour water on a fire, and it absorbs the heat, put a jar over it, it removes the oxygen, stop adding wood to a campfire it goes out.
