1. ***You must show your work to receive credit for this question. Nitrogen dioxide and water react to produce nitric acid, HNO3, and nitrogen oxide.

3NO2 + H2O --> 2HNO3 + NO

How many grams of H2O are needed to produce 45g of NO?.

2. ***You must show your work in order to receive credit for this question.

Using the equation below, calculate the number of grams of N2 that are formed from the reaction of 21 grams of NH3.

4NH3 + 3O2 --> 2N2 + 6H2O

An experiment is conducted to see if cats preferred skim milk or 2% milk. a cup of skim milkwas put out for 5 kittens and then measured how much the kittens drank over the course of aday. following a cup of 2% milk was purout for the skittens and then masured how much thekittens drank over the course of a day. the same kittens were used and the milk was served atthe same temperature. it was discovered that the cats liked the 2% milk more than the skimmilk. what is the dependent variable in this experiment?