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Alexus [3.1K]
3 years ago
7

Please help quickly i have exam

Chemistry
1 answer:
katrin [286]3 years ago
7 0

Answer:

ALL EXCEPT

"O and S" and "F and Cl"

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A 475 ml sample of a gas was collected at room temperature of 23.5 °C and a pressure of
Molodets [167]

Answer:

The volume when the conditions were altered is 0.5109 L or 510.9 mL

Explanation:

Using the general gas equation,

P1 V1 / T1 = P2 V2 / T2

where;

P1 = 756 mmHg

V1 = 475 ml = 0.475 L

T1 = 23.5°C = 23.5 + 273K = 275.5 K

P2 = 722 mm Hg

T2 = 10°C = 10 + 273 K = 283 K

V2 = ?

Rearranging to make V2 the subject of the formula, we obtain:

V2 = P1 V1 T2 / P2 T1

V2 = 756 * 0.475 * 283 / 722 * 275.5

V2 = 101, 625.3 / 198911

V2 = 0.5109 L or  510.9 mL

3 0
3 years ago
Set up a ripple tank with a wave generator on one side.
Simora [160]

when the waves pass from the deeper water to the shallower water its speed will decrease.

<h3>What is refraction of wave?</h3>

Refraction of wave is the change in direction of a wave passing from one medium to another caused by its change in speed.

For example, waves travel faster in deep water than in shallower water.

Thus, we can conclude that when the waves pass from the deeper water to the shallower water its speed will decrease.

Learn more about refraction of waves here: brainly.com/question/1360744

#SPJ1

6 0
2 years ago
Which statements differentiate DNA and RNA? Select three options.
Morgarella [4.7K]

Answer:

A.) DNA is a double helix, and RNA is a single strand.



C.) DNA is involved only in transcription, and RNA is involved in both transcription and translation.



E.) DNA does not have uracil as a nitrogen base, but RNA does have uracil as a nitrogen base.











Explanation:

Have a great rest of your day
#TheWizzer

3 0
2 years ago
Read 2 more answers
What does the kinetic theory state about the relationship between the speed and temperature of gas molecules?
mario62 [17]

The kinetic theory state about the relationship between the speed and temperature of gas molecules "As the temperature increases, the speed of gas molecules increases".

<u>Option: </u>C

<u>Explanation:</u>

The temperature relates to a gas, according to the kinetic theory of gases, influences the rate of motion of the gas particles. The higher the gas temperature, the faster the gas particles are moving; the reverse is true, too.

This is because the gas particles gain more kinetic energy as the temperature of the gas increases, and therefore move faster and collide more with each other and the container walls.The rate of a gas's molecules is proportional to the temperature, and is inversely proportional to the gas's molar mass.

5 0
3 years ago
What amount of ice must be added to 250 g of water at 15°c to cool the water to 0°c and have no ice left
Juliette [100K]

Answer:

\mathbf{m= 47 \ g}

Explanation:

The heat needed to melt ice (q_1) + heat needed to cool water (q_2) = 0

m\Delta H_{fusion} + mc \Delta T = 0

m \times 333.55 J g^{-1} + 250 \ g \times 4.184 \ Jg^{-1 \ 0 } \times (-15.0 \ ^0 C) = 0

m \times 333.55 J g^{-1} =15690

m=\dfrac{15690 \ J }{333.55 J g^{-1} }

\mathbf{m= 47 \ g}

7 0
3 years ago
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