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kirza4 [7]
2 years ago
11

Choose whether each statement is a scientific hypothesis, theory, or law. The pressure a gas exerts on a container increases as

the temperature increases because the particles in the warmer gas move faster and collide with the walls of the container with more force.
Chemistry
1 answer:
Naya [18.7K]2 years ago
7 0

Answer:

1) theory

2) law

3) hypothesis

Explanation:

edge 2021

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Is an apple a pure substance or a mixture?
guajiro [1.7K]
An apple would be a mixture. While a mixture is a combination of elements and substances, a pure substance acts as an element itself, therefore, having the properties of only THAT certain element. 


6 0
3 years ago
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Which substance is a base? HCOOH RbOH H2CO3 NaNO3
Alex Ar [27]

Answer:

RbOH

Explanation:

For this question, we have to remember what is the definition of a base. A base is a compound that has the <u>ability to produce hydroxyl ions</u> OH^-, so:

AOH~->~A^+~+~OH^-

With this in mind we can write the <u>reaction for each substance:</u>

HCOOH~->~HCOO^-~+~H^+

RbOH~->~Rb^+~+~OH^-

H_2CO_3~->~CO_3^-^2~+~2H^+

NaNO_3~->~Na^+~+~NO_3^-

The only compound that fits with the definition is RbOH, so this is our <u>base</u>.

I hope it helps!

6 0
3 years ago
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A mixture of compounds containing diethylamine, phenol, ammonia, and acetic acid is separated using liquid-liquid extraction as
umka2103 [35]

Answer:

I would expect to extract the acetic acid.

Explanation:

In the first step, since we are adding a concentrated acid,<u> it will react with the bases present in the mixture (diethylamine and ammonia) </u><u>forming salts</u><u>, </u><u>which are soluble in water</u>. Therefore, after draining the aqueous layer, we will have phenol and acetic acid left in the organic layer.

In the second step, we are adding a diluted base, so it will react with a strong acid. This compound is acetic acid, and its salt will be present in the aqueous layer. Phenol will be left on the organic layer.

7 0
3 years ago
Use the portion of the periodic table shown below to answer the questions. A portion of the first three columns of the periodic
Anna71 [15]

I'm not sure about part 1, you may need to google it, but part two is 11 protons, 11 electrons and 12 neutrons. You can find protons and electrons by just looking at the atomic number, and you can find neutrons by subtracting the atomic number from the atomic mass.

7 0
3 years ago
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Which of the following solutions is the most acidic?
grandymaker [24]

Answer:

i thin its a solution with the pH of 3

Explanation:

i don't understand the third choice

6 0
3 years ago
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