devry chem120 week 1 quiz latest 2016 july

1. Question : (TCO 1) You have been growing cucumbers for a number of years. However, you have not been satisfied with the size of the cucumbers crop that Variety XYZ has produced. The distributor claims that 50 bushels of cucumbers should be produced per 10 plants. Your crop is producing 35 bushels per 10 plants. Based upon advertising, you have identified three different fertilizers, GroBig, BiggerYet, and MaxiBig, that you want to test. You hypothesize that MaxiBig will produce the largest crop of cucumbers. Design an experiment to test this hypothesis. Include your control(s) (2 pts) and your experimental design (4 pts). Describe the experimental results that would support your hypothesis. (2 pts) Be specific.

Question 2. Question : (TCO 1) How many meters are in 9 yards? Show your work.

Question 3. Question : (TCO 1) How many milligrams are in 5 ounces? Show your work.

Question 4. Question : (TCO 1) Diamond has a density of 3.52 g/mL. What is the volume in mL of a diamond with a mass of 4.6 g? Show your work.

Question 5. Question : (TCO 2) Determine the number of protons, neutrons and electron for the element Calcium. The mass number for the isotope of this element is 42. You must show your work for each determination to receive credit. (2 pts per determination)

Question 6. Question : (TCO 2) Consider a neutral atom with 30 protons and 34 neutrons. The atomic number of the element is

94.

30.

64.

32.

34.

Question 7. Question : (TCO 2) Heptane is always composed of 84% carbon and 16% hydrogen. This illustrates the law of

definite proportions.

conservation of mass.

multiple proportions.

all of the above.

none of the above.

Question 8. Question : (TCO 2) Which type of radioactivity has a negative charge?

alpha

beta

gamma

all of the above.

none of the above.

Question 9. Question : (TCO 2) The proton has

the same mass and charge as the electron.

the smaller mass and same charge as the electron.

a smaller mass and opposite charge as the electron.

a larger mass and opposite charge as the electron.

none of the above.

Question 10. Question : (TCO 2) Which subatomic particles have approximately the same mass?

electrons and neutrons

electrons and protons

neutrons and protons

electrons, neutrons and protons

none of the above