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Igoryamba
3 years ago
6

Compare and contrast a pure substance with a mixture and give an example.

Chemistry
1 answer:
Inessa [10]3 years ago
3 0

Of any substance? What about two powders such as 1/2 cup of white flour, then mixing 1/2 cup of salt together with the flour. This would then form a more coarse mixture being that the two particles differ in shape.

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Many people think that summer is warmer because the earth is closer to the sun at that time of year. explain why
Marysya12 [62]
Summer days are warmer because the path of the sun is longer and we have more direct sunlight during that time
5 0
3 years ago
Match the part of the wave to the diagram
erik [133]

Answer:

The first high part is Q4, then the low part is Q7, the following high part is Q6, and the energy moving from the next two high points is Q5.

Explanation:

The first high part is Q4, then the low part is Q7, the following high part is Q6, and the energy moving from the next two high points is Q5 because of the diagram.

5 0
3 years ago
One of the biggest dangers of storms that produce heavy rains or storm surges is ___.
Lubov Fominskaja [6]

Answer:

B. Flooding

Explanation:

Flooding can be caused by heavy rains/storm surges. Hope this helped!

4 0
2 years ago
How does calcium obey the octet rule when reacting to form compounds?
wolverine [178]
The answer is C. because it gives up two electrons.
8 0
3 years ago
Read 2 more answers
Ammonia will decompose into nitrogen and hydrogen at high temperature. An industrial chemist studying this reaction fills a flas
valentina_108 [34]

Answer:

Kp = 0.022

Explanation:

<em>Full question: ...With 2.3 atm of ammonia gas at 32. °C. He then raises the temperature, and when the mixture has come to equilibrium measures the partial pressure of hydrogen gas to be 0.69 atm. </em>

<em />

The equilibrium of ammonia occurs as follows:

2NH₃(g) ⇄ N₂(g) + 3H₂(g)

Where Kp is defined as:

Kp = \frac{P_{N_2}P_{H_2}^3}{P_{NH_3}^2}

<em>Where P represents partial pressure of each gas.</em>

<em />

As initial pressure of ammonia is 2.3atm, its equilibrium concentration will be:

P(NH₃) = 2.3atm - 2X

<em>Where X represents reaction coordinate</em>

<em />

Thus, pressure of hydrogen and nitrogen is:

P(N₂) = X

P(H₂) = 3X.

As partial pressure of hydrogen is 0.69atm:

3X = 0.69

X = 0.23atm:

P(NH₃) = 2.3atm - 2(0.23atm) = 1.84atm

P(N₂) = 0.23atm

P(H₂) = 0.69atm

Kp = \frac{0.23atm*0.69atm^3}{1.84atm^2}

<h3>Kp = 0.022</h3>
8 0
4 years ago
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