The total pressure inside a 1.62 cylinder kept at 35°C is 1.15 atm. If the volume of the cylinder drops to 0.74 L and the temperature remains the same, what is the new pressure inside the cylinder?

Answers

Answer 1

Answer: By exponential outcome 21934

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What mass of NaCl solid should be added to 100mL of pure water to produce a 6.00M solution?

Answers

Molar mass NaCl : 58.44 g/mol

Volume = 100 mL / 1000 = 0.1 L

Molarity = 6.00 M

M = n / V

6.00 = n / 0.1

n = 6.00 * 0.1

n = 0.6 moles

1 mole NaCl ( 58.44 g/mol) * 0.6

mass = 58.44 * 0.6

mass = 35.064 g

hope this helps!

Is freezing water a physical or chemical change

Answers

Freezing water is a physical change, because it just changes the form of water, no it's chemical structure.

Which compound has the highest percent composition by mass of strontium?

Answers

Assuming all the compounds of interest are given. We proceed on the theoretical way of answering this question. Assume 1 gram of each compound. Multiply it by the reciprocal of the molar mass of the compound. Then multiply it by the molar ratio of the Strontium to the compound. Then, multiply it by the molar mass of strontium. Finally divide this answer by 1 gram and multiply by 100.

If two gases are present in a container, the total pressure in the container is equal toa.the sum of the pressures that are exerted by each of the two gases.
b.twice the sum of the pressures that are exerted by the individual gases.
c.the sum of the pressures that each gas would exert if they occupied twice the volume.
d.the sum of the pressures that each gas would exert if they occupied half the volume.

Answers

Answer: The correct option is (a).

Explanation:

If two gases are present in a container, the total pressure in the container is equal to the sum of the all the individual pressures exerted by the individual gases in a container.

Individual pressure exerted by the individual gas in a container is called partial pressure of that individual gas.

So, total pressure of gas in container is:

$p^o=p_a+p_b$

Where $p^o$ = Total pressure exerted by the gases in the container.

$p_a$ = Partial pressure of gas 'a'

$p_b$ = partial pressure of gas 'b'

The answer is a, because the question is referring to partial pressures. Partial pressures are a mere sum, no halving or doubling of anything is necessary.

So, A

Hope this helped :)

What kind of energy transformation occurs in a gasoline-powered car? A.
Chemical energy is converted into mechanical energy.

B.
Mechanical energy is converted into light energy.

C.
Light energy is converted into sound energy.

D.
Sound energy is converted into chemical energy.

Answers

The energy transformation occurs in a gasoline-powered car is chemical energy is converted into mechanical energy. The answer is letter A. The rest of the choices do not answer the question above.

The answer is A. Chemical edgy is converted into mechanical energy. This is done buy the combustion engine of the car. The gasoline (chemical) is ignited by the spark plug moves the pistons in the engine (mechanical).

When an electron is displaced in a semiconductor, the hole that's left behind isA. attracted to the negative terminal of the voltage source.
B. attracted to the anode of the voltage source.
C. considered an impurity in the crystal.
D. incapable of carrying a charge.

(D. is wrong)

Answers

answer is A : attracted to the negative terminal of the voltage source
I think, that the "hole"moves as it captures a free electron leaving another hole in a slightly different place. The electron leaving leaves a net + charge, which is attracted to the negative terminal. Because the "hole" behaves as a positive charge it is attracted towards the negative terminal.

Answer:

A. attracted to the negative terminal of the voltage source.

Explanation:

bc that is what the hole that's left behind does

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