How do you find significant figures in numbers?

Significant Figure Rules  

Non-zero digits are always significant.

All zeros between other significant digits are significant.

The number of significant figures is determined by starting with the leftmost non-zero digit. The leftmost non-zero...

The rightmost digit of a decimal number is the least significant digit or least significant figure. Another way to look...

Explanation:

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a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.