Question

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Answer 1

Answer:

1)

A is nahco3

B is na2co3

C is CO2

2)

1) yellow in colour it is lead iodide

2)Pb(NO3)2 + KI = KNO3 + PbI2 |

3) yes

3)Endothermic and exothermic reactions are chemical reactions that absorb and release heat, respectively. A good example of an endothermic reaction is photosynthesis. Combustion is an example of an exothermic reaction. The categorization of a reaction as endo- or exothermic depends on the net heat transfer.