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CHEM 101 FINAL EXAM REAL EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) A GRADE CA$19.43
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CHEM 101 FINAL EXAM REAL EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) A GRADE

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CHEM 101 FINAL EXAM REAL EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) A GRADE Changes in energy can take place in what two forms? a. potential and kinetic energy b. heat and work d. heat and temperature c. thermofission and nucleosis - Answer b. heat and work The law of conservat...

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  • September 17, 2024
  • 13
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • chem 101
  • chem 101 final exam
  • chem 101 final exam real exam questions
  • changes in energy can take place in what two forms

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  • CHEM 101
  • CHEM 101

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CHEM 101 FINAL EXAM REAL
EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS)
A GRADE
Changes in energy can take place in what two forms?
a. potential and kinetic energy
b. heat and work
d. heat and temperature
c. thermofission and nucleosis - Answer ✔ b. heat and work

The law of conservation of energy states that in chemical and physical changes, ___.
a. Energy is not created or destroyed
b. Energy is always released to the surroundings
c. Exothermic changes are favored
d. The universe increases the amount of energy - Answer ✔ a. Energy is not created or
destroyed

The mixture of gas and air inside a cylinder reacts, releasing 300 kJ of heat. If the
system does 150 kJ of work on the piston, what is the change in total energy?
a. 450 kJ
b. -45000 kJ
c. 150 kJ
d. -150 kJ - Answer ✔ a. 450 kJ

How much heat is required to raise the temperature of 125 grams of water by 10.0 °C?
(q = msDT,
s = 4.184J/goC)
a. 1250 J
b. 12.5 J
c. 10.0 J
d. 5230 J - Answer ✔ d. 5230 J

The following reaction is an example of an ___ reaction.

2 K (s) + Cl2 (g) --> 2 KCl (g) ΔHrxn = -873.0 kJ

a. exothermic
b. endothermic
c. endergonic

, d. ergonomic - Answer ✔ a. exothermic

a chemical change always involves a change in the _________ of matter - Answer ✔
composition

which of the following is an endothermic process?
A. burning wood in a fireplace
B. heating water to convert it to steam
C. burning gasoline in a combustion engine
D. digesting food - Answer ✔ b. Heating water to convert it to steam

A highly reactive chemical compound reacts with another compound and produces
products that are more stable than the initial reactants. During this chemical reaction
heat was released. According to this information this reaction was ____________. -
Answer ✔ exothermic

which undergoes continued testing and refinement so that we know more about how
something happens in nature? - Answer ✔ theory

which of the following is equal to 0.00539?
a. 5.39 x 10^3
b. 5.39 x 10^2
c. 5.39 x 10^-3
d. 5.39 x 10^-2 - Answer ✔ c. 5.39 x 10^-3

a student measures the volume of a solution to be 0.03010 L. how many significant
digits are in this measurement? - Answer ✔ 4

a solution has a mass of 15.03 grams, and a volume of 14.4 mL. what is the density of
this solution, reported to the correct number of significant digits? - Answer ✔ 1.04 g/mL

a sample of metal has a mass of 0.0793 grand. what is this mass in milligrams? -
Answer ✔ 79.3 mg

which of the following is equal to 1 mL? - Answer ✔ 1 cm^3

a car is moving at 60.0 miles/hr. How many feet/sec is the driver travelling? 1 mile =
5,280 ft. - Answer ✔ 88 ft/sec

which temperature is the coldest?
a. 116 K
b. -20 C
c. -105 F
d. Unable to verify since all temperatures are the same. - Answer ✔ a. 116 K

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