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Veseljchak [2.6K]
3 years ago
10

Ethanol melts at -114 °C and boils at 78 °C.

Chemistry
1 answer:
Aliun [14]3 years ago
5 0
A) solid
b)liquid
c)liquid
d)gas
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A sample of gas in a balloon has an initial temperature of 21 ∘C and a volume of 1310 L . If the temperature changes to 70 ∘C ,
bixtya [17]

Answer:

1528.3L

Explanation:

To solve this problem we should know this formula:

V₁ / T₁ = V₂ / T₂

We must convert the values of T° to Absolute T° (T° in K)

21°C + 273 = 294K

70°C + 273 = 343K

Now we can replace the data

1310L / 294K = V₂ / 343K

V₂ = (1310L / 294K) . 343K → 1528.3L

If the pressure keeps on constant, volume is modified directly proportional to absolute temperature. As T° has increased, the volume increased too

7 0
3 years ago
How do the two desalination processes differ from the atmospheric water generator in terms of where the processes can be used?
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Water Desalination Processes. Water desalination processes separate dissolved salts and other minerals from water. Feedwater sources may include brackish, seawater, wells, surface (rivers and streams), wastewater, and industrial feed and process waters. Membrane separation requires driving forces including pressure (applied and vapor),...

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4 0
3 years ago
Scientists observe patterns in how molecules interact with each other. At the same temperature, for example, liquids have more a
Alla [95]

Answer:

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7 0
2 years ago
I need help on this fast plz
algol [13]

Answer:

the answer is 7 which is the atomic number of nitrogen

Explanation:

Al+Na=24

24/Oxygen (8) =3

3x rounded atomic mass of Ne (3x20) = 60

60+ 20 (# of neutrons in K)=80

80-30 (# of electrons in zinc)= 50

50/25 (the atomic number of Mn)=2

2x9 (number of protons in F)= 18

18+24 (atomic mass of Mg)=42

42/6 (number of neutrons in boron)=7

7 is the atomic number of Nitrogen (N)

3 0
3 years ago
Which of the following elements ia an alkali metal?
Anna11 [10]

A) Potassium

Potassium contains the six chemical elements that make it an alkali metal?

7 0
3 years ago
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