PO 1. Take the reaction: NH3 + 02 → NO + H2O. In an experiment, 3.25 g of NH3 are allowed to react with 3 50 g of Oz
a. Which reactant is the limiting reagent?
b. How many grams of NO are formed?
c. What is the percent yield of NO?
​

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?