Which of the following statements are true? Question 1 options:

According to collision theory, any factor that can cause more collisions will increase the rate of reactions.

According to collision theory, factors can cause more collisions, but will not change the rate of reactions.

According to collision theory, factors that can cause more collisions have less energies than the activation energy, thus will decrease the rate of reaction.

According to the collision theory, no factors can influence reaction rates.

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"

i'm pretty sure its b i might be wrong though!

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.