Why might increasing the temperature alter the rate of a chemical ...

[Cooldude101]

Why might increasing the temperature alter the rate of a chemical reaction?
 
  A) The molecules will have a higher kinetic energy and bump into one another harder.
  B) The molecules are less reactive at higher temperatures.
  C) The molecules will more likely combine with other atoms at high temperature to save space.
  D) The density decreases as a function of temperature and this leads to an increase in volume which drops the rate of reaction.
  E) none of the above

Question 2

If the relative mass of a hydrogen atom is 1/4 that of a helium atom, how many helium atoms would you need to equal the mass of 200 hydrogen atoms?
 
  A) 50
  B) 200
  C) 800
  D) 4
  E) 100

[Jbrasil]

Answer to Question 1

Answer: A

Answer to Question 2

Answer: A

[Cooldude101]

Both answers were spot on, thank you once again

[Jbrasil]

Great! Please up vote