Q7 of 152 Page 18

What does the symbol (aq) represent in a chemical equation?

It represents the compound is in aqueous solution form.

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5 State whether the following statement is true or false:

A chemical equation can be balanced easily by altering the formula of a reactant or product.

 6 What is wrong with the following chemical equation?

Mg + 0 MgO


Correct and balance it.

 8 Why is photosynthesis considered an endothermic reaction? 9

How will you indicate the following effects in a chemical equation?


(a) A solution made in water


 


(b) Exothermic reaction


 


(c) Endothermic reaction