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
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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
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
Substances are classified as acidic, basic, or neutral. The feature that suggests a substance is basic is when the pH is greater than 7. So the correct answer is d.
As a sample of water turns to ice, the arrangement of the molecules changes. So the correct answer is c.
If you only wanted to increase the particle motion of a gas without increasing any of its other properties, the most correct situation would be to keep the gas at a constant volume and keep the temperature constant, but decrease the pressure of the gas. So the correct answer is d.
Supersaturation occurs when a solvent's temperature is increased to increase the dissolving amount, then cooled to a normal temperature. So the correct answer is c.
I hope these answers bring a smile to your face! Let me know if you have any more questions.
The pH is greater than 7 suggests that a substance is basic.
The arrangement of the molecules changes as a sample of water turns to ice.
To increase the particle motion of a gas without increasing any of its other properties, you should keep the gas at a constant volume and keep the temperature constant, but decrease the pressure of the gas.
Supersaturation occurs when a solvent's temperature is increased to increase the dissolving amount, then cooled to a normal temperature.
To determine whether a substance is acidic, basic, or neutral based on the pH scale, we need to understand that the pH scale ranges from 0 to 14. Substances with a pH less than 7 are considered acidic, those with a pH of 7 are neutral, and those with a pH greater than 7 are basic.
For the first question, the correct answer is (d) The pH is greater than 7. This suggests that the substance is basic.
Regarding the second question about water turning to ice, the correct answer is (c) The arrangement of the molecules changes. When water freezes and turns into ice, the molecules arrange themselves in a rigid lattice structure, resulting in a solid state.
Now, let's move on to the third question about increasing the particle motion of a gas without changing any other properties. The correct answer is (a) Keep the gas at a constant pressure and keep the temperature constant, but increase the volume of the gas. By increasing the volume of the gas while keeping the pressure and temperature constant, the particles will have more space to move around, increasing their motion.
Finally, for the fourth question about supersaturation, the correct answer is (c) Supersaturation occurs when a solvent's temperature is increased to increase the dissolving amount, then cooled to a normal temperature. Supersaturation happens when a solvent is heated to dissolve more solute than it would normally dissolve at a given temperature. This solution is then cooled down, resulting in a higher concentration of dissolved solute than would usually be possible at that temperature.
Read your question directly above. This is so difficult to read and interpret. I won't help again unless you number the questions AND label the answers clearly. It's difficult to even know where answer a or b or c can be found.
1. pH = 7 neutral
pH < 7 = acid and pH > 7 = basic
2. c
3. I don't like any of the answers shown. Perhaps answer c, which is missing, may be a better fit but it isn't there.
4. c