Question

1. Carbon dioxide gas turns into lime water
2. Air exerts pressure in directions
3. Ozone layer is present in
4. Envelope of air extends up to km into space​

Answer 1

Answer:

atmosphere

5000 million

3.55*10 ^23

3.76*1022

2.01*10 20

Answer 2

Explanation:

1) Carbon dioxide reacts with limewater (a solution of calcium hydroxide, Ca(OH)2), to form a white precipitate (appears milky) of calcium carbonate, CaCO3. Adding more carbon dioxide results in the precipitate dissolving to form a colourless solution of calcium hydrogencarbonate.

Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O(l)

CaCO3(s) + CO2(g) + H2O(l) → Ca(HCO3)2(aq)

This is used as a test for carbon dioxide. When carbon dioxide is bubbled through limewater the limewater changes from colourless to milky.

2) Air pressure is exerts in all direction.

3) Ozone layer is present in stratosphere.

4)traposphere