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SCORPION-xisa [38]
3 years ago
12

What element have 3 PELS?

Chemistry
1 answer:
qaws [65]3 years ago
4 0

Answer:

boron aluminum gallium indium

Explanation:

hope this helps you

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Ethanol had a boiling point of 78.4°C. Propane has a boiling point of -42°C. Suggest why.​
Gwar [14]

Answer:

Chemical compounds all have different melting points.

Explanation:

chemical compounds all have different freezing and boiling points. Different chemical compounds means they will have different chemical structures.

7 0
3 years ago
How many grams of gas must be released from a 32.0 L sample of CO2(g) at STP to reduce the volume to 16.6 L at STP?
Hoochie [10]

Answer:

30.3 g

Explanation:

At STP, 1 mol of any gas will occupy 22.4 L.

With the information above in mind, we <u>calculate how many moles are there in 32.0 L</u>:

  • 32.0 L ÷ 22.4 L/mol = 1.43 mol

Then we <u>calculate how many moles would there be in 16.6 L</u>:

  • 16.6 L ÷ 22.4 L/mol = 0.741 mol

The <u>difference in moles is</u>:

  • 1.43 mol - 0.741 mol = 0.689 mol

Finally we <u>convert 0.689 moles of CO₂ into grams</u>, using its <em>molar mass</em>:

  • 0.689 mol * 44 g/mol = 30.3 g
6 0
3 years ago
Which is a property of barium (Ba)?
pogonyaev

Answer:

a it rarely reach with other elements

6 0
3 years ago
Which of these statements is true about photons?
Yuliya22 [10]

Answer: it’s a I believe

Explanation: protons are smaller then atoms which means they have less mass

6 0
2 years ago
Which will cause an increase in the reaction rate between molecules?
Mariana [72]
I think it's B. Molecules collide more frequently
3 0
3 years ago
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