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ahrayia [7]
2 years ago
15

Picture shown! What is the melting point of this substance at 1 ATM of pressure?

Chemistry
1 answer:
Oksana_A [137]2 years ago
5 0

Answer:

The melting point of this substance at 1 ATM of pressure is 110°.

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If the ph of a solution is decreased from ph 8 to ph 6 it means that the
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Explanation:

Relation between pH and concentration of hydrogen ions is as follows.

                  pH = -log [H^{+}]

So, it means that an increase in the value of pH will show that there occurs a decrease in concentration of hydrogen ions.

Therefore, the solution becomes basic in nature.

On the other hand, a decrease in the value of pH will show that there occurs an increase in the concentration of hydrogen ions.

Therefore, the solution becomes more acidic in nature.

Hence, if the pH of a solution is decreased from pH 8 to pH 6 it means that the concentration of hydrogen ions has increased in the solution.

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3 years ago
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A boy with pneumonia has lungs with a volume of 1.7 L that fill with 0.070 mol of air when he inhales. When he exhales, his lung
BlackZzzverrR [31]

Answer:

0.053moles

Explanation:

Hello,

To calculate the number of moles of gas remaining in his after he exhale, we'll have to use Avogadro's law which states that the volume of a given mass of gas is directly proportional to its number of moles provided that temperature and pressure are kept constant. Mathematically,

V = kN, k = V / N

V1 / N1 = V2 / N2= V3 / N3 = Vx / Nx

V1 = 1.7L

N1 = 0.070mol

V2 = 1.3L

N2 = ?

From the above equation,

V1 / N1 = V2 / N2

Make N2 the subject of formula

N2 = (N1 × V2) / V1

N2 = (0.07 × 1.3) / 1.7

N2 = 0.053mol

The number of moles of gas in his lungs when he exhale is 0.053 moles

7 0
3 years ago
A factor that changes in an experiment from manipulation of the independent variable is the what?
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Manipulation of the independent variable should change the dependent variable, the value of which "depends" on the independent variable's change in value.
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4) list 3 protest rights you have that are protected under the law. How can you protect these rights? George Floyd’s ?
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Peaceful Protest, Signing Pettitons, contacting mayors/governors and writing emails/sending letters
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The tendency of a moving object to continue moving in a straight line or a stationary object to remain in place is called
Mademuasel [1]
The tendency of a moving object to continue moving in a straight line or a stationary object to remain in place is called inertia.

Answer: C) or the third option.
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3 years ago
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