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morpeh [17]
2 years ago
8

Calculate the mass of a substance which has a volume of 35

Chemistry
1 answer:
makkiz [27]2 years ago
7 0

The answer is 17.5kg.

To get the mass of an object you do Volume × Density. The SI unit of Mass is "kg."

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A rubber balloon was filled with helium at 25.0˚C and placed in a beaker of liquid nitrogen at -196.0˚C. The volume of the cold
Ksenya-84 [330]

Answer:

The volume of helium at 25.0 °C is 60.3 cm³.

Explanation:

In order to work with ideal gases we need to consider absolute temperatures (Kelvin). To convert Celsius to Kelvin we use the following expression:

K = °C + 273.15

The initial and final temperatures are:

T₁ = 25.0 + 273.15 = 298.2 K

T₂ = -196.0 + 273.15 = 77.2 K

The volume at 77.2 K is V₂ = 15.6 cm³. To calculate V₁ in isobaric conditions we can use Charle's Law.

\frac{V_{1}}{T_{1}} =\frac{V_{2}}{T_{2}} \\V_{1}=\frac{V_{2}}{T_{2}} \times T_{1}=\frac{15.6cm^{3} }{77.2K} \times 298.2K=60.3cm^{3}

3 0
3 years ago
After observing (you can repeat the process more than once), write a general statement explaining how reducing the volume change
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Answer:

The correct answer is that both molecular motion, pressure and temperature increase as volume reduces.

Explanation:

A reduction in volume changes the molecular motion, temperature and pressure of the system. When the volume of the container decreases, this causes the pressure to increase, the temperature to increase and the molecular motion to increase. This is because a liquid and a solid are incompressible, so by reducing the volume of a gas, the molecules increase their movement as the temperature of the system increases, which is due to the increased pressure applied to reduce the volume of the system.

Have a nice day!

4 0
3 years ago
Give five examples of exothermic reactions in everyday life
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Answer:

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Hot Packs. ...

Rusting Of Iron. ...

Burning Of Candles. ...

Lightning Of Match. ...

Setting Cement And Concrete.

Explanation:

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3 years ago
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D I think the answer is D for this question

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How can liquid reach higher temperatures in a pressure cooker than in an unsealed pot?
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Answer:

the heat is circulating in the same spot rather than airing out into the open

Explanation:

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