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2 years ago

From the information in the graph and the given list

Chemistry

1 answer:

puteri [66]2 years ago

8 0

Based on the phase diagram, the melting temperature of Q is 60°C, however the boiling temperature is not shown.

<h3>What is a phase diagram?</h3>

A phase diagram is a graph which shows the effect of pressure and temperature on the phase of a substance.

The melting or freezing point of a substance is that temperature in which the substance exists as both solid and liquid.

From the graph, the melting temperature of Q is 60°C.

The boiling or condensation point is temperature at which the substance exists as liquid and gas.

At the boiling point of a substance, its vapor pressure is equal to atmospheric pressure.

In the graph, the boiling temperature of Q is not shown clearly.

Learn more about phase diagram at: brainly.com/question/1612862

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Liquid nitrogen has a density of 0.808 g/mL and boils at 77 K. Researchers often purchase liquid nitrogen in insulated 185 L tan

Serga [27]

Answer:

37.14 %

Explanation:

Using the equation, mass, M = D1 * V1

= D2 * V2

Where,

D1 = density of the liquid Nitrogen

D2 = density of gaseous Nitrogen

V1 = volume of the liquid Nitrogen

V2 = volume of the gaseous Nitrogen

Calculating V2,

0.808 * 185 = 1.15 * V2

Volume of Nitrogen after expansion = 129.98 m3.

Volume = L * b * h

= 10 * 10 * 3.5

Volume of the room = 350 m3.

Fraction of air = volume of Nitrogen after expansion/volume of the room * 100

= 129.98/350 *100

= 37.14 %

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3 years ago

The explosions that take place during a fireworks show are an example of which of the following?Image of fireworks exploding in

babymother [125]

Chemical change
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4 0

3 years ago

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What is the only chemical that is liquid at room temperature

Arturiano [62]

The only chemical that is a liquid at room temperature is Mercury. It's toxic, and has a high vapor pressure at room temperature.

8 0

3 years ago

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Which phrase best describes a scientists?

larisa86 [58]

Answer:

They are helpers of the world who find out about the natural world and try to explain what they have observed.

Explanation:

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3 years ago

What is the ph of a 0.014 M HCL solution?

Allushta [10]

Answer:

pH $= 1.853$

Explanation:

For every mole of hydrochloric acid, one mole of hydronium ion is required. Thus, in order to neutralize 0.014 moles of HCL, 0.014 moles of hydronium is required.

$[H_3O^+] = [HCl] = 0.014$

pH $= -log [H^+] = -log [H_3O^+]$

Substituting the available values in above equation, we can say that the pH of the solution is equal to

$- log (0.014)$

pH $= 1.853$

pH of a $0.014$ M HCL solution $= 1.853$

8 0

3 years ago