How much mass of silica reacts if it is known that 788.4 kJ of heat was released by its reaction with fluorine, but the thermochemical
equation of the reaction is as follows
SiO2 + 2F2 ---> SiF4 + O2 + 657kJ​

Sharon reads two different articles about avocados. the first article, in a weight loss magazine, claims that avocados are unhealthy because they are high in fat. the second article, in an annual publication from a doctors’ group, claims that the fat in avocados is a type that is good for the heart. to assess these claims, which question(s) might sharon ask? check all that apply. is the source of this claim reputable? where are avocados sold? is the source an authority on the subject? which source do avocados come from? how much do avocados cost?