please show all work, please explain everthing.

A. Definitions ( 25 points total) - Write the word that best fits each definition: The power of 10 in a number written in scientific notation b. A determination about whether a small change in independent variable x produces a significant change in dependent variable y. c. The non-zero difference between the amounts of mass entering and leaving a continuous-flow process unit How close a measured value is to the true value of the thing being measured A condition or property of your system that you don't verify but you include in your analysis B. Multiple choice ( 25 points total) - Please circle the letter corresponding to your response 1. Which is NOT a unit of pressure? a. Newtons b. mmHg c. atm d. kPa e. pounds per square inch (psi) 2. Estimate - which number comes closest to a million hours? a. 1 month b. 1 year c. 20 years d.) 100 years e. 1,000 years 3. The correct answer to 32.1+3.21+0.321 a. 35.631 b. 35.63 c. 135.6 d. 36.0 e. 36 Which mixture is NOT heterogeneous? a. mustard b ketchup c. salt water d. Coca-Cola e. orange juice 5. Which of these assumptions relates to the physical state of the contents of a system, rather than the process? a. Well-mixed b. constant temperature c. steady state d. reaction goes to completion e. ideal gas