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Natali5045456 [20]
3 years ago
15

The gas carbon dioxide is a pure substance. Which of the following is true about carbon dioxide?

Chemistry
1 answer:
masha68 [24]3 years ago
6 0

Answer:

the answer is A :)

Explanation:

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a helium balloon has a volume of 2.95 liters at 25 c. the volume of the ballon decreased to 2.25 l after it is placed outside on
OleMash [197]

Answer:

The outside temperature is -45.8°C

Explanation:

When a gas keeps on constant its moles and its pressure, we can assume that volume will be increased or decreased as the T° (absolute T° in K).

V1 / T1 = V2 / T2

2.95L/298K = 2.25L / T2

(2.95L/298K ) . T2 = 2.25L

T2 = 2.25L . 298K / 2.95L

T2 = 227.2K

T°K - 273 = T°C

227.2K - 273 = -45.8°C

3 0
4 years ago
How many atoms of oxygen are in 4.00 moles of N2O5
SVETLANKA909090 [29]

Answer:

there are 20 oxygen atoms in 4.00 moles of Dinitrogen pentoxide

Explanation:

there are 2 atoms in an oxygen molecule , so each oxygen molecules has at least 2. Dinitrogen pentoxide is N2O5, which has 7 atoms, 2 nitrogen and 5 oxygen. 1 molecule of N2O5 has 5 oxygen atoms, so 4 of then would be 20

8 0
3 years ago
Which of the following explains how electricity flows? Protons flow from the positive end of a source towards the negative end.E
zalisa [80]
I know for a fact the answer would (not) be the last option. This would not be a way that electricity would be able to really flow.

Your correct answer would be of when the "e<span>lectrons flow from the negative end of a source towards the positive end."

This would be because when the electrons would be free, they would have enough energy to then move from the negative side of the end, to the positive side.</span>

7 0
3 years ago
The vapor pressure of ethanol at
Karo-lina-s [1.5K]
482VP I think is  the correct answer.
5 0
3 years ago
Name two device that are using spinning​
ikadub [295]
<h3><u>Two </u><u>device</u><u> </u><u>that </u><u>are </u><u>using</u><u> </u><u>spinning</u></h3>

→ <u>Takli</u>

  • Takli is a small support style spindle. Takli is a perfect tool for spinning cotton, and this are used too to spin fibers, cotton, cashmere, and silk etc. Takli is known as handspindle. And it is the simplest device for spinning.

→ <u>Charkha</u>

  • Charkha is a device for spinning thread or yarn from fibers etc. This are known as spinning wheel.

<h2>HAVE A NICE DAY!</h2>
7 0
3 years ago
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