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Lostsunrise [7]
3 years ago
11

The student wants to test the conductivity of each solution. Prior to carrying out the investigation, the student needs to ident

ify the variables being controlled and the variables being changed between the two solutions. Which identification of the variables is correct?
Options:

The volume of the solution and the concentration of the solution are being changed between the two solutions, but the number of solute particles is being held constant.


The number of solute particles and the concentration of the solution are being changed between the two solutions, but the volume is being held constant.


The number of solute particles is being changed between the two solutions, but the volume and concentration of the solution is being held constant.


The volume of the solution and the number of solute particles are being changed between the two solutions, but the concentration of the solution is being held constant.

Chemistry
2 answers:
Valentin [98]3 years ago
4 0

Answer:

B

Explanation:

because when the particle dissolve the volume stays the same

puteri [66]3 years ago
3 0

Answer:b

Explanation: the particles will soon dissolve which means that the particles are changing but the volume is staying the same and the concentration is changing

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In an experiment, mice were fed glucose (C₆H₁₂O₆) containing a small amount of radioactive carbon. The mice were closely monitor
Luden [163]
<h3>Answer:</h3>

Carbon dioxide

Explanation:

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3 years ago
The temperature of a 10.0 L sample of nitrogen in a sealed container is increased from 22°C to 202°C, while its pressure is incr
stiks02 [169]

Answer:

The new volume is 5.37 L

Explanation:

Step 1: Data given

Initial volume = 10.0 L

Initial temperature = 22.0 °C

Initial pressure = 1.00 atm

Final temperature = 202 °C

Final pressure = 3.00 atm

Step 2: Calculate final volume

(P1*V1)/T1  = (P2*V2)/T2

⇒ with P1 = The initial pressure = 1.00 atm

⇒ with V1 = The initial volume = 10.0 L

⇒ with T1 = The initial temperature = 22 °C = 295 Kelvin

⇒ with  P2 = The final pressure = 3.00 atm

⇒ with V2 = The final volume = TO BE DETERMINED

⇒ with T2 = The final temperature = 202 °C = 475 Kelvin

(1.00 * 10.0) / 295 = (3.00 * V2) / 475

10 / 295 = 3V2/ 475

3V2 = 4750/295

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3 0
3 years ago
When 54.50 and 50.407 are divided, how many significant figure would you have?
Anastaziya [24]

Answer:

4 sig figs

Explanation:

<h3>Rule when dividing or multiplying:</h3>

After normally solving the expression cut round the decimal to the least accurate of the two.

54.50/50.407 = 1.08119904

Since 54.50 is the least accurate we will round to the hundredths place.

1.081 is final answer

so there are 4 sig figs.

8 0
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Answer:

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Melting can be best described as a process in which molecules gain enough kenetic energy to put past each other.

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