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ivann1987 [24]
3 years ago
15

14. A solution with a pH of 13 is a ____.

Chemistry
2 answers:
lukranit [14]3 years ago
6 0
A solution with the pH of 13 is a Strong Base.
schepotkina [342]3 years ago
3 0
.A pH meter is divided into two. The numbers that are lesser than 7 are the pH numbers of acids. The lesser the number, the stronger is the acid. Further, the numbers greater than 7 are for the bases and the stronger the base, the higher is the value for the pH. Thus, the answer to this item is the fourth choice, strong base. 
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3. A property that does NOT depend on the amount of matter such as density, color, temperature. A. Intensive B. Extensive​
pshichka [43]

Answer:

extensive

hope it helps!

5 0
3 years ago
If you mix different amounts of two ideal gases that are originally at different temperatures, what must be true of the final st
faltersainse [42]

Answer:

a,c are correct

Explanation:

a) On mixing two gases the final temperature of both the gases becomes the same. The heat will flow from high temp. gas to lower temp gas till the temp of both gases become equal (Thermal equilibrium). This is correct.

b) The rms speed of the molecule is inversely proportional to its molar mass so the final rsm will not be the same. This is incorrect.

c) The average kinetic energy of the system will remain the same. Hence this is also correct.

5 0
3 years ago
Choose all that apply. Solids, liquids, and gases can be distinguished by their:molecular weight shape temperature kinetic energ
vesna_86 [32]
So, we have:
- molecular weight
- shape
- temperature
- kinetic energy
- mass
- density

Let's rule out the different options.
- molecular weight: Say you have a molecule of H2O. H2O can be a solid, liquid, or gas, but its molecular weight never changes throughout (It's still the same molecule, no matter what phase it is in). We can rule this out.

- shape: Let's pretend we have three identical closed containers, and we fill each one halfway with water, blocks of ice cubes, and water vapor. In the container with water, you will see that the water takes the shape of the container, but doesn't fill the entire container up. The ice cubes will stay ice cubes, assuming they don't melt, so they don't take the shape of the container. The vapor will fill up the entire container. Since all three are different, I would say yes, this could be a distinguishable feature.

- temperature: In general, I would say no, because every element/molecule has different boiling points and different vaporization points. So if you have a liquid at 5°C, you could also have a different element in solid form at 5°C. But if you're comparing a single type of molecule, it would have a boiling point and a vaporization point, so you <em>would</em> be able to tell between them.

- kinetic energy: Kinetic energy refers to how much movement there is in respect to each molecule. In solids, the molecules are packed tightly together and can't move very much, so they have lower kinetic energy. In liquids, they are less packed, but still restricted. And in gases, they can fly freely, so they will have much more kinetic energy than liquids or solids. This one's a yes.

- mass: No matter what form, there are still the same amount of molecules, and each molecule has the same mass as before. It won't change.

- density: Since the molecules are more spread out in gases, it will be less dense. Liquids will be more dense, and solids will have the greatest density. So, yes.

Conclusion: shape, kinetic energy, density, (and temperature if it's talking about a single type of molecule)
5 0
3 years ago
According to the graph, which of the following substances is least soluble in 100 grams of water at 50°C?
Snowcat [4.5K]

Answer:2) NaCl

Explanation:

4 0
3 years ago
Read 2 more answers
Would a thermos without a lid with water in it be an open or closed system? I'm so confused... also please explain your answer,
Dmitriy789 [7]

Answer:

. A closed system allows only energy transfer but no transfer of mass. Example: a cup of coffee with a lid on it, or a simple water bottle. ... In reality, a perfectly isolated system does not exist, for instance hot water in a thermos flask cannot remain hot forever.

8 0
3 years ago
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