2 Which of the gases in air are elements? Explain how you can tell.

Chemistry

2 answers:

Goryan [66]2 years ago

7 0

Explanation:

nitrogen and oxygen are the gases in the air which are elements you can simply say it by looking the periodic table

Agata [3.3K]2 years ago

5 0

Answer:

I'll explain.

Explanation:

The molecules of two different elements, nitrogen and oxygen, make up about 99 percent of the air. The rest includes small amounts of argon and carbon dioxide. Oxygen is the life-giving element in the air. You can tell because they're on the periodic table which is a table for elements.

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Four springs are stretched to the same distance from the equilibrium position. The spring constants are listed in the table. A 2

svp [43]

Answer:

The correct option is;

X, W, Y, Z

Explanation:

The parameters given are;

Spring (S), Spring Constant (N/m)

W, 24

X, 35

Y, 22

Z, 15

The equation for elastic potential energy, $E_e$ , is $E_e = 0.5 \times k \times x^2$

The above equation can also be written as $E_e =\dfrac{1}{2} \times k \times x^2$

Where:

k = The spring constant in (N/m)

x = The spring extension

Therefore, since the elastic potential energy, $E_e$ , of the spring is directly proportional to the spring constant, k, we have the springs with higher spring constant will have higher elastic potential energy, $E_e$ , therefore the correct order is as follows;

X > W > Y > Z

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3 years ago

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dolphi86 [110]

The change of phase from a vapor to a liquid is called condensation.
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4 0

3 years ago

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If a saturated solution of potassium chloride is cooled from 80℃ to 50℃,how much precipate is formed

harina [27]

Roughly 39 grams, give or take 1 gram