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Lostsunrise [7]
2 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]2 years ago
4 0

Answer:

B

Explanation:

because when the particle dissolve the volume stays the same

puteri [66]2 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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Answer: The pressure in atmospheres is 0.674 in the container if the temperature remains constant.

Explanation:

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P_1V_1=P_2V_2  

where,

P_1 = initial pressure of gas  = 205 kPa

P_2 = final pressure of gas = ?

V_1 = initial volume of gas  = 4.0 L

V_2 = final volume of gas = 12000 ml = 12 L    (1L=1000ml)  

205\times 4.0=P_2\times 12  

P_2=68.3kPa=0.674atm        (1kPa=0.0098atm)

Therefore, the pressure in atmospheres is 0.674 in the container if the temperature remains constant.

8 0
3 years ago
Does gas have a definite denisty?​
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<h2><em>no</em></h2>

Explanation:

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Answer: Carbon Dioxide, Methane, Nitrous Oxide and Fuorinated Gases

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Methane (CH4): Methane is emitted during the production and transport of coal, natural gas, and oil. Methane emissions also result from livestock and other agricultural practices and by the decay of organic waste in municipal solid waste landfills.

Nitrous oxide (N2O): Nitrous oxide is emitted during agricultural and industrial activities, combustion of fossil fuels and solid waste, as well as during treatment of wastewater.

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