(i need this answered quickly! i will give brainliest and extra-extra points to the first person who answers this correctly! )

which is usually associated with a faster reaction rate?
a. adding a catalyst to the reactants
b. blowing a whistle near the reactants
c. removing heat energy from the reactants
d. decreasing the concentration of a solution of the reactants

The boiling point of propanoic acid is higher than that of 1-butanol because: propanoic acid has a higher molecular weight than 1-butanol. propanoic acid is more soluble in water than 1-butanol. propanoic acid is a better hydrogen bond donor than 1-butanol. propanoic acid forms hydrogen bonded dimers and 1-butanol does not. 1-butanol forms hydrogen bonded dimers and propanoic acid does not.

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.

Acompound has the molecular formula c3h8. which class of organic compounds does it belong to?