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kogti [31]
3 years ago
6

Please help me this is due by midnight!!

Chemistry
1 answer:
mamaluj [8]3 years ago
4 0

Answer:

c

Explanation:

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In one sentence, explain how the particles of a substance change as a substance changes from a solid to a liquid to a gas.
mestny [16]

Answer:

An example would be ice.

Explanation:

Because ice starts off as a solid and then when it melts from heat turns into a liquid and then if heated can to into a gas.

5 0
3 years ago
Match them please, I’ll give brainliest but only if it’s right.
Molodets [167]
1. A
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Hope this helps.
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3 years ago
What factors influence the efficiency of a solar oven?
Anna007 [38]
The more sunlight that is present, the better the oven will be able to produce electricity.  This means that a solar oven will be more efficient on a sunny day than on a cloudy day.  Also, depending on the time of day, if the solar panel is in shadow, the oven will greatly decrease in efficiency.
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3 years ago
Equal volumes of hydrogen and helium gas are at the same pressure. The atomic mass of helium is four times that of hydrogen. If
OverLord2011 [107]

Answer:

The ratio of the temperature of helium to that of hydrogen gas is 2:1.

Explanation:

Atomic mass of hydrogen = M

Temperature of hydrogen gas =T

Pressure of the hydrogen gas = P

Mass of the hydrogen gas = m

Moles of the hydrogen gas = n=\frac{m}{2M}

Volume of the hydrogen gas = V

Using an ideal gas equation:

PV=nRT=PV=\frac{mRT}{M}...(1)

Temperature of helium gas =T'

Pressure of the helium gas = P'= P

Mass of the helium gas = m' =m

Moles of the helium  gas = n'=\frac{m}{M'}=\frac{m}{4M}

Volume of the helium gas = V' = V

Using an ideal gas equation:

P'V'=n'RT'=\frac{mRT'}{4M}...(2)

Divide (2) by (1)

\frac{P'V'}{PV}=\frac{\frac{mRT'}{4M}}{\frac{mRT}{2M}}

\frac{T'}{T}=\frac{2}{1}

The ratio of the temperature of helium to that of hydrogen gas is 2:1.

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3 years ago
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alina1380 [7]
The answers from top to bottom right to left are
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