Chemistry, 16.09.2021 03:30 maciemessing2
Substances are classified as acidic, basic, or neutral. The pH scale can be used to classify a substance. Which feature suggests that a substance is basic?
a
The pH is 0.
b
The pH is 7.
c
The pH is less than 7.
d
The pH is greater than 7.
As a sample of water turns to ice,
a
new molecules are formed.
b
the mass of the sample is increased.
c
the arrangement of the molecules changes.
d
energy is absorbed by the molecules.
If you only wanted to increase the particle motion of a gas without increasing any of it's other properties, which would the most correct situation?
a
Keep the gas at a constant pressure and keep the temperature constant, but increase the volume of the gas
b
Keep the gas in a fixed container at constant pressure and increase the temperature
c
Keep the gas in a fixed container at constant pressure and decrease the temperature
d
Keep the gas at a constant volume and keep the temperature constant, but decrease the pressure of the gas
What is supersaturation?
a
Supersaturation occurs when a different solvent is added to a solvent, increasing how much can be dissolved
b
Supersaturation occurs when natural water dilutes a solvent that also dissolves the solute at the same time
c
Supersaturation occurs when a solvent's temperature is increased to increase the dissolving amount, then cooled to a normal temperature
d
Supersaturation requires the use of powered solute, to increase the saturation point beyond the normal maximum
Answers: 2
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