Question

By reading the activity in the picture answer this question :

1. Why should we put a cork on the mouth of the flask?

2. Does the mass of the flask and its contents change? Support you answer.

Answer 1

Hi!!

i am also in class 9.. same as you!!!

Here is an answer which you can write in exam-

✴1) We should put a cork on the mouth of the flask to prevent any vapour formed during the reaction from escaping out of the flask.

✴2)No, the mass of the flask does not change because mass can neither be nor destroyed in a chemical reaction. However, the contents of the flask have changed because in a chemical reaction there is formation of new substances.


I HOPE THIS MAY HELP!!☺

Answer 2

Answer:

1. We should put a cork on the mouth of the flask to prevent any vapor formed during the reaction from escaping out of the flask

2. No, The mass of the flask does not change because Mass can neither be nor destroyed in a chemical reaction. However, the contents of the flask have changed because in a chemical reaction there is formation of new substances.