Question

Question 11 (5 points)

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The measure of the number of atoms in one element that will combine with an atom of another element is
Question 11 options:


A)
atomic charge.


B)
molecular number.


C)
valence.


D)
atomic number.
Question 12 (5 points)

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The source of the sun's heat is nuclear
Question 12 options:


A)
fission.


B)
separation.


C)
fusion.


D)
disintegration.
Question 13 (5 points)

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In the chemical equation Zn + 2HCl → ZnCl + H, the reactants are
Question 13 options:


A)
zinc and hydrochloric acid.


B)
zinc chlorate and water.


C)
zinc chloride and hydrogen.


D)
zinc and hydrogen carbonate.
Question 14 (5 points)

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When two atoms of different elements come in contact, heat is given off and light is produced. Which of the following does this support?
Question 14 options:


A)
The law of conservation of energy


B)
The law of conservation of matter


C)
The law of definite proportions


D)
Dalton's atomic theory
Question 15 (5 points)

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Paraffins are the simplest _______ series, where the difference between each member of the series is a simple structural unit.
Question 15 options:


A)
ketone


B)
aromatic


C)
homologous


D)
aliphatic
Question 16 (5 points)

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Which of the following elements is stable?
Question 16 options:


A)
Neon, atomic number 10


B)
Carbon, atomic number 6


C)
Fluorine, atomic number 9


D)
Boron, atomic number 5
Question 17 (5 points)

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The molecular mass of sodium oxide (Na2O) is
Question 17 options:


A)
38.98917.


B)
45.97954.


C)
61.97894.


D)
22.98977.
Question 18 (5 points)

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Sodium and chlorine combine to form table salt, also called sodium chloride. Sodium chloride is a/an
Question 18 options:


A)
atom.


B)
element.


C)
compound.


D)
mixture.
Question 19 (5 points)

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Which metal will displace nickel in a compound?
Question 19 options:


A)
Arsenic


B)
Tin


C)
Zinc


D)
Platinum
Question 20 (5 points)

In order to digest food, the human body requires
Question 20 options:


A)
high activity to burn off energy.


B)
sleep to perform the necessary break down of molecules in food.


C)
enzyme catalysts to speed up reactions.


D)
physical reactions in the stomach lining.

Answer 1

11: C — valence.
12: C — fusion.
13: A — zinc and hydrochloric acid.
14: A — the law of conservation of energy (energy released as heat/light during reaction).
15: C — homologous.
16: A — Neon (atomic number 10, a noble gas).
17: C — 61.97894.
18: C — compound.
19: C — Zinc (more reactive, will displace nickel).
20: C — enzyme catalysts to speed up reactions.