Answer:
230.3 kJ
Some chemical reactions show release of heat while some show absorption of heat. On these bases, the reaction is classified as either endothermic or exothermic. Negative sign of ΔH means exothermic reaction.
Answer:
determining how many ozone molecules are lost in the atmosphere
Answer: Yes, they're neutral.
the second one, any change in a DNA gene or chromosome
I think it’s A. The force of the stirring
