Ch. 9 & 13 stochiometry & gas **test** conceptual / Chem

For problems involving calculations, show the relevant equation (or formula and conversion factor(s)), show your work in an organized manner, put the proper units in your calculations / answer, and have the proper number of significant figures in your answer. [40 points]

**Academic Honesty**: The answers on this test are my own and I am using only the allowed set of notes as described in the syllabus. I have not discussed the test questions with anyone before or during the test nor have I seen the test questions prior to the exam. If you violate any of the preceding items or do not sign, your semester grade is a F.

Signature: ___________________

1. A syringe with a volume of 35 mL has a pressure of 95 kPa at 22 °C. The volume of the syringe was reduced to 25 mL and its temperature to –5 °C. What is the pressure in the syringe ? [10 points]

2. solve for __. [10 points]

a. 375 kPa = __ mm Hg

b. 1.25 atm = __ torr

3. 5.0 grams of H_{2 } gas reacts with 35 grams of N_{2 } gas to produce __ grams of NH_{3 }. [10 points]

4. How many grams of water would be formed in the reaction:

CH

_{3 }OH + O2 --> CO_{2 }+ H_{2 }O

2.0 g excess # g = ?