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11) If a gas with a volume of 2 L is allowed to expand to a volume of 6 L. What happens to the pressure in the container if the temperature remains constant? * 1 point
pressure triples
pressure decreases by a factor of three pressure remains the same
not enough information
12) If the temperature of a balloon is lowered, what happens to the volume of the air in the balloon if the pressure is constant? * 1 point
It decreases
The change cannot be predicted
It stays the same
It increases
13) If the gas inside a capped syringe is heated, in which direction will the syringe plunger move? * 1 point
in
the plunger will not move
out
14) Increasing the volume of a given amount of a gas at constant temperature causes the pressure to decrease because _____________. * 1 point
the molecules are moving more slowly
there are more molecules
there are fewer molecules
molecules are striking a larger area with the same force
15) A breathing mixture used by deep-sea divers contains helium, oxygen, and carbon dioxide. The partial pressure of He and CO₂ are 81 kPa and 0.1 kPa, respectively. The total pressure is 101 kPa. What is the partial pressure of oxygen? * 1 point
66.5 kPa
80 kPa
101 kPa
20. kPa
16) Which of the following gases will effuse the most rapidly? * 1 point
helium
bromine
oxygen
nitrogen
17) Which of the following is primarily responsible for holding water molecules together in the liquid state? * 1 point
dispersion forces
ionic bonds
hydrogen bonds
polar covalent bonds
18) What causes the high melting point of ice? * 1 point
dispersion forces
covalent bonding
ionic attractions
hydrogen bonding
19) Predict which one of the following compounds would be insoluble in water. * 1 point
PbSO₄
C₆H₁₄
HCl
LiCl
20) To conduct electricity, a solution must contain * 1 point
free electrons
nonpolar molecules
ions
polar molecules
21) Colloids * 1 point
can be separated by filtering
scatter light
are homogenous
settle out when allowed to stand
22) Which of the following is a homogeneous mixture? * 1 point suspension
colloid
compound
solution
23) What occurs in solvation? * 1
point Ionic compounds are formed.
Solvent molecules surround solute ions. Solvent molecules bind covalently to solute molecules.
Solute ions separate from solvent molecules.
Answers
Answered by
16
Answer:
11) pressure triples in 1st case
12) it increases
13) out
14) molecules are striking a larger area with the same force
16) oxygen
17) polar covalent bond
18) covalent bonding
19) C6H14
20) ions
21) are homogeneous
22) colloids
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Answered by
2
11) pressure triples in 1st case
12) it increases
13) out
14) molecules are striking a larger area with the same force
16) oxygen
17) polar covalent bond
18) covalent bonding
19) C6H14
20) ions
21) are homogeneous
22) colloids
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