Author Question: For an exothermic reaction, lowering the temperature of the reaction will ________. A) increase ... (Read 129 times)

mp14 · **on:** Aug 27, 2018

For an exothermic reaction, lowering the temperature of the reaction will ________.

A) increase the amount of products
B) decrease the amount of reactants
C) decrease the amount of products
D) both A and B

Question 2

In 1961, the reference for the atomic mass unit (amu or u) was changed from naturally occurring oxygen with a value of 16.000 u to one based on a single isotope of carbon (carbon-12). Why was it changed?

A) The atomic composition of oxygen varies depending upon its source.
B) Carbon-12 is more common than oxygen.
C) Carbon exists as only one isotope, carbon-12.
D) Carbon can combine with four atoms of hydrogen to form CH4, methane, while oxygen only combines with two atoms of hydrogen to form water, H2O.