Week 2 Lesson Quiz

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Question #1

What is the density of the aluminum block?

A 2.00 kg/L

B 0.40 kg/L

C 2.70 kg/L

D 0.92 kg/L

E 0.15 kg/L

Question #2

When you click on the button for the same mass what is volume of the yellow block?,,

A 5.00 L

B 10.00 L

C 1.25 L

D 2.50 L

Question #3

Jaques Cousteau’s observations aboard the Calypso contributed to what type of science?,,

A Fact-based

B Hypothesis-driven

C Applied

D Pure

E Opinion-driven

Question #4

Which of the following is the best scientific question for proposing a hypothesis and designing an experiment on the effect of a drug (Drug X) on decreasing blood pressure?,,

A Should we lower blood pressure?

B Why is Drug X important to blood pressure?

C How does Drug X affect blood pressure readings?

D Does Drug X affect blood pressure?

Question #5

Which scientist helped develop the cell theory?

A Christopher Wren

B Robert FitzRoy

C Gregor Mendel

D Charles Darwin

E Robert Hooke

Question #6

Determine which of these substances will have the highest temperature after absorbing 500.0 kJ of heat. Assume that all substances are starting at the same initial temperature and are of equal mass.

A not enough information

B lead, 0.128 J/g∙°C

C ethanol, 2.42 J/g∙°C

D copper, 0.385 J/g∙°C

E water, 4.18 J/g∙°C

Question #7

As ice cools from 273 K to 263 K, the average kinetic energy of its molecules will:

A increase

B none of these

C decrease

D remain the same

Question #8

A certain reaction is exothermic. Therefore, the reverse of this same reaction must be a(n)

A exothermic process.

B endothermic process.

C chemical change.

D isothermal process.

E none of the above

Question #9

I recently had my house fumigated with methyl bromide (CH3Br). I paid for 2.00 kg of CH3Br. How many moles does this represent?

A 94.9

B 2.11 × 10-2

C 189.9

D 21.1

Question #10

Suppose you pull off the broken tungsten filament in a burned-out incandescent light bulb. You take its mass and find it to be 0.100 grams. How many atoms of tungsten are in this filament

A 6.022 × 1023

B 5.44 × 10-5

C 1.84 × 1025

D 3.28 × 1020

Question #11

A gold wire has a diameter of 1.00 mm. What length of this wire contains exactly 1.00 mol of gold? (density of Au = 17.0 g/cm3)

A 2630m

B 251 m

C 3.69 m

D 62.7 m

E 14.8 m

Question #12

A copper wire has a diameter of 2.00 mm. What length of this wire contains exactly 1.00 mol of copper? (density of Cu = 8.92 g/cm3)

A 2.27 m

B 45.1 m

C 0.567 m

D 180. m

E 0.178 m

Question #13

Suppose I lay before you 5.0 gram samples each of Sr, Zr, Co, and Te. Which of these samples would contain the smallest number of moles?

A Co

B Sr

C They would all contain the same number of moles

D Zr

E Te

Question #14

1.00 mole of O2 contains the same number of oxygen atoms as:,,

A 1.00 mole of CH3CO2H.

B All of these.

C 2.00 mole of CH3CH2OH.

D 0.667 mole of O3.

Question #15

What is the molar mass of calcium permanganate?

A 216 g/mol

B 278 g/mol

C 159 g/mol

D 199 g/mol

Question #16

When answering the question of what I would do for a Klondike bar, I said I would jump into the Nile river with a crocodile while wearing 5.50 x 1025 atoms of lead on my body. What would be the mass of this lead in kg?

A 6.022 x 1023

B 1.60 x 1045

C 1.89

D 18.9

E 1.14 x 1025

Question #17

Your physician has told you to increase your potassium intake by eating more bananas. The problem is, he wrote this down in terms of moles and not bananas. He said to eat at least 0.0216 moles of potassium per day. An average banana contains about 422 mg of potassium. How many bananas do you need to eat each day?

A 5

B 1

C 3

D 2

E 4

Question #18

If they form an ion which of the following elements, would have a +2 charge?

A Ne

B Ag

C O

D Br

E Mg

Question #19

All of the following statements about different elements are true EXCEPT:

A Iodine is a halogen.

B Chromium is a transition metal.

C Krypton is one of the noble gases.

D Sulfur is considered a nonmetal.

E Barium is an alkali metal.

Question #20

Which group of three elements contains a nonmetal, a metal, and a metalloid?,,

A I, Hg, Si

B Na, Hg, I

C Li, Al, Si

D H, Al, N

E K, O, Br

Question #21

When alcohol is combusted with oxygen, you produce carbon dioxide and water. If you produce 18 grams of water and 22 grams of carbon dioxide from 32 grams of oxygen, how many grams of alcohol were needed for the reaction?,,

A 28

B 16

C 8

D 32

Question #22

Which element is a metal, can have properties that are not always easily predictable based on its location on the periodic table, and starts with the letter ,,

A Cl

B C

C Cr

D Ca

E Cs

Question #23

To which family does krypton belong?

A alkaline earth metals

B noble gases

C alkali metals

D halogens

E none of the above

Question #24

A fictional element has two isotopes and an atomic mass of 88.8 amu. If the first isotope is 86 amu and the second isotope has a mass of 90. amu. Which isotope has the greatest natural abundance?

A there are equal amounts

B 86 amu

C 90. amu

D Not enough information provided.

E none of the above

Question #25

Which one of these scientists discovered the atomic nucleus?

A Democritus

B Dalton

C Mendeleev

D Thomson

E Rutherford

Question #26

Which of the following statements is true as stated by the chemist Joseph proust?

A All samples of a given compound have the same proportions of their constituent elements.

B The nucleus is a dense region of positive charge that always contains protons and neutrons.

C Matter cannot be either created or destroyed in a chemical reaction.

D All atoms of a given element have a constant composition and are different than atoms of any other element.

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