`A fictional element has two isotopes, each making up 50% of the population. Isotope 1 has a
mass of 95.0 amu, Isotope 2 has a mass of 93.0 amu. Calculate the atomic mass of the fictional element.
A. 188 amu
B. 94 amu
C. 46.5 amu
D. 47.5 amu
E. none of the above
`Which element was used to define what an amu is?
A. H
B. O
C. C
D. He
E. none of these
`All of the following statements about different elements are true EXCEPT:
A. Sulfur is considered a nonmetal.
B. Chromium is a transition metal.
C. Iodine is a halogen.
D. Krypton is one of the noble gases.
E. Barium is an alkali metal.
`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. 32
C. 16
D. 8
`When hydrogen is combusted with oxygen the product is water. If you produce 20 grams of water using 2 grams of hydrogen, how many grams of oxygen were needed for the reaction?
A. 22
B. 10
C. 40
D. 18
E. none of the above
Which one of these scientists discovered the atomic nucleus?
A. Thomson
B. Democritus
C. Dalton
D. Mendeleev
`How would you correctly write the atomic number for the element nitrogen?
A. 7
B. 14
C. 21
D. 5A
E. none of the above
`One of the compounds listed below represents an empirical formula. Which one? A. C22H34O10
B. C5H12O2
C. C6H6
D. C6H12O3
Rutherford's experiment with alpha particle scattering by gold foil established that:
A. electrons have a negative charge.
B. atoms are made of protons, neutrons, and electrons.
C. protons are 1840 times heavier than electrons.
D. protons are not evenly distributed throughout an atom.
E. electrons have a positive charge.
`If I tell you the mass ratio of H to P in a compound is 0.0968, which of the following could it be?
A. PH2.
B. PH6.
C. PH.
D. PH3.
E. none of the above
`My friend has been isolating gold foils from gold plated electronic equipment. He recently was
able to take a 3.00 gram gold nugget to sell to a buyer. How many moles of gold were in his nugget?
A. 0.0152
B. 197
C. 591
D. 107.9
E. 0.0278
`In 2009, the average American produced 37,919.5 pounds of carbon dioxide emissions. If there3.0/ 3.0 Points are 454 grams in a pound, how many molecules of carbon dioxide is this?
A. 44.0
B. 2.36 × 1029
C. 1.14 × 1024 D. 1.90
What is the mass of 3.50 x 1024 Ti atoms?
A. 5.81 g
B. 278 g
C. 47.9 g D. 5.81 amu
E. 47.9 amu
`You run an experiment in the lab and you isolate 2.984 x 1022 atoms of an alkali metal. You find 3.0/ 3.0 Points it's mass to be 4.235 grams, so, using the molar mass, what is the identity of this alkali metal?
A. Li B. Mg C. K D. Rb E. Ba
`If you were holding 1 mol of calcium in your right hand and 1 mol of strontium in your left hand, 3.0/ 3.0 Points which of the following would be true?
A. The contents of your left hand would have a greater mass than the contents of your right hand. B. The contents of your right hand would have a greater mass than the contents of your left hand. C. The mass of the contents in each hand would be equal.
D. There is not enough information to answer this question.
Valium is C16H13N2OCl. If my cat was prescribed 5 mg, how many moles does he receive in 1 dose?
My cat was prescribed an antispasmodic commonly used in humans, Valium. The formula for
A. 1.42
B. 3.51 x 10-5
C. 0.0176
How many F atoms are in 5.54 g of F2?
A. 0.292 atoms
B. 8.78 × 1022 atoms
C. 0.146 atoms
D. 6.02 × 1023 atoms
E. 1.76 × 1023 atoms
Ammonium acetate, NH4C2H3O2 is frequently used to create a buffer in solutions. Two moles of
this compound contains:
A. 14 moles of hydrogen.
B. 12 moles of hydrogen.
C. 5 mole of oxygen.
D. 3 moles of carbon.
Part 3 of 7 - Part 03
Question 19 of 32
`A certain reaction is exothermic.
Therefore, the reverse of this same reaction must be a(n)
A.
isothermal process.
B.
exothermic process.
C.
chemical change.
D.
endothermic process.
E.
none of the above
____ energy is the energy of position.
A. electrical
B. kinetic
C. potential
D. chemical
E. none of the above
`Which of these is a common unit of energy?
A. joule
B. kJ
C. kilowatt-hour
D. calorie
E. all of the above
Part 4 of 7 - SCIN120 Lab Lesson
Question 22 of 32
Jaques Cousteau’s observations aboard the Calypso contributed to what type of science?
A.
Applied
B.
Pure
C.
Fact-based
D.
Opinion-driven
E.
Hypothesis-driven
Who published On the Origin of Species by Means of Natural Selection?
A. Charles Darwin B. Robert FitzRoy
C. Gregor Mendel D. Robert Hooke
E. Christopher Wren
What should be included when designing a scientific question?
A. It should be based on bias
B. It should be based on background research
C. It should be based on moral or legal issues
D. It should repeat the work of another researcher
E. It should be very general
When you click on the button for the same volume what is mass of the blue block?
A. 8.00 kg
B. 6.00 kg
C. 4.00 kg
D. 2.00 kg
When you click on the button for the same volume what is mass of the green block?
A. 4.00 kg
B. 8.00 kg
C. 6.00 kg
D. 2.00 kg
When you click on the button for the same mass what is volume of the red block?
A. 1.25 L
B. 10.00 L
C. 5.00 L
D. 2.50 L
What is the density of the aluminum block?
A. 0.92 kg/L
B. 2.00 kg/L
C. 0.40 kg/L
D. 2.70 kg/L
E. 0.15 kg/L
What is the density of the ice block?
A. 0.15 kg/L
B. 2.70 kg/L
C. 0.92 kg/L
D. 2.00 kg/L
E. 0.40 kg/L
What Material is the Mystery Box E composed of?
What is the density of the Aluminum block?
In 2-3 sentences, what was the overall purpose of the lab for this week?
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