Question

Please answer my questions ​

Answer 1

Answer:

Explanation:

Take one of the following sets, X and Y

of chemicals–

X Y

(i) copper sulphate sodium carbonate

1.25 g 1.43 g

(ii) barium chloride sodium sulphate

1.22 g 1.53 g

(iii) lead nitrate sodium chloride

2.07 g 1.17 g

• Prepare separately a 5% solution of

any one pair of substances listed

under X and Y each in 10 mL in water.

• Take a little amount of solution of Y in

a conical flask and some solution of

X in an ignition tube.

• Hang the ignition tube in the flask

carefully; see that the solutions do not

get mixed. Put a cork on the flaskWeigh the flask with its contents

carefully.

• Now tilt and swirl the flask, so that the

solutions X and Y get mixed.

• Weigh again.

• What happens in the reaction flask?

• Do you think that a chemical reaction

has taken place?

• Why should we put a cork on the mouth

of the flask?

• Does the mass of the flask and its

contents change?

Law of conservation of mass states that

mass can neither be created nor destroyed in a chemical reaction.

pls mark as brainliest

Answer 2

The law of conservation of mass states that even in physical and chemical changes the the mass of the reactants and the product remains the same.

Explanation:

• We have to take a certain amount of water in a container. Then we have to heat the the water. we have to calculate the mass of the container and the water before and after the reaction and we find out that both have the same mass. the chemical reactions are balanced for maintenance of the law of conservation of mass.

• the volume of a liquid does not change when a solute dissolves in the solvent because there is integration of the molecules of the solid inside the free spaces which are present in the liquid until they enter a saturated state.

• the kinetic energy states that when a substance changes from solid to liquid there is separation of the the molecules. As a result of this there is more vibration of the substances and hence liquids are able to flow and gases can move freely.

To know more about law of conservation of energy,

State the law of Conservation of Energy. - Brainly.in

https://brainly.in/question/1062718