What do the symbols tell you about the conditions
of the reactions shown to the right? check all of
the boxes that apply.
the products and reactants of both reactions
are gases.
1) 3h, (g)+n3(g) 450"c 2nh, (g)
reaction 1 occurs at high pressure.
2) 250, (9) +02(9) 20, 250, (9)
red
reaction 2 makes a small amount of an
additional product.
a catalyst is used for reaction 2.

Mariah is randomly choosing three books to read from the following: 5 mysteries, 7 biographies, and 8 science fiction novels. which of these statements are true? check all that apply. there are 20c3 possible ways to choose three books to read. there are 5c3 possible ways to choose three mysteries to read. there are 15c3 possible ways to choose three books that are not all mysteries. the probability that mariah will choose 3 mysteries can be expressed as . the probability that mariah will not choose all mysteries can be expressed as 1 −