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katovenus [111]
3 years ago
12

Choose all that apply.

Chemistry
2 answers:
Vlad1618 [11]3 years ago
8 0

Gas pressure within a fixed container will increase when gas is heated and also when mass of gas is increased.

Answer: Options B and D

<u>Explanation: </u>

In a closed container, the temperature is proportional to pressure according to the pressure law. When the gas presents in a container, it means that the size of the container remains constant unless/until it is changed by increasing its size or decreasing it.

When the container gets heated, gas particles gains more kinetic energy, moves faster and hits the inner walls of the container. The amount of gas particles also seems to be more.

And so, it hits the container's wall more frequently and with more speed and force. Hence, these make the gas pressure in the container to increase. According to the Boyle’s law,

                                        p V=n R T

Where, p – pressure, V – volume, n – no. of moles, R – gas constant, T – temperature.

This also tells the reason how the gas pressure increases when the amount of gas and temperature get increased.

SSSSS [86.1K]3 years ago
7 0

B) Gas is heated, And D) Mass of gas increased.

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2). A student collects 425 L of oxygen at a temperature of 24.0°C and a pressure
Mazyrski [523]

Answer:

15.5 moles

Explanation:

Applying,

PV = nRT.................. Equation 1

Where P = pressure, V = Volume, n = number of mole, R = molar gas constant, T = Temperature.

Make n the subject of the equation

n = PV/RT............... Equation 2

From the question,

Given: P = 0.899 atm, V = 425 L, T = 24 °C = (273+24) K = 297 K.

Constant: R = 0.083 L.atm/K.mol

Substitute these values into equation 2

n = (0.899×425)/(297×0.083)

n = 15.5 moles

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3 years ago
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Sliva [168]

Answer:

1. false

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Explanation:

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6 0
3 years ago
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Please explain the difference between reactants and products in a chemical reaction.
KonstantinChe [14]

Answer

A reactant is a substance that is present at the start of a chemical reaction. These are what breakdown to form products and its always to the right.

A product is a substance that is present at the end of a chemical reaction. These are what are formed after the reactants are broken down, the end result.

7 0
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12.39 HBr can be added to alkenes in either the absence or presence of peroxides (producing either the Markovnikov or the anti-M
Alex777 [14]

Answer:

See explanation and image attached

Explanation:

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In the absence of peroxides, the reaction proceeds in accordance with Markovnikov rule which states that;''the negative part of the addendum, is attached to the carbon atom with the least number of hydrogen atoms attached.'' This occurs in the first reaction shown in the image.

In the presence of peroxides, the reaction proceeds in an anti-Markovnikov manner to yield the product shown in the second reaction.

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Why does temperature increase between changes of physical state?
Alekssandra [29.7K]
As temperatures increase, additional heat energy is applied to the constituent parts of a solid, which causes additional molecular motion. Molecules begin to push against one another and overall volume of a substance increases. When thermal energy is added to a substance, it’s temperature increases.
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