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lapo4ka [179]
3 years ago
5

Help please,just the answers which student​

Chemistry
2 answers:
Lyrx [107]3 years ago
8 0
E and g because hey are both putting dangerous chemicals in a benker
BARSIC [14]3 years ago
5 0

Answer:

Students A, B, and E

Explanation:

Student A is playing in the lab, student B is sniffing the flask, you're supposed to waft, and student E is eating while working.

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A hot air balloon, when fully inflated, contains 2,800,000 Liter of air. If each mole of air occupies 22.4 L of at a temperature
emmainna [20.7K]

Answer:

1.44 atm

Explanation:

Step 1:

We'll begin by calculating the number of mole in 2,800,000 Liter of air.

I mole of air occupy 22.4L.

Therefore, Xmol of air will occupy 2800000L i.e

Xmol of air = 2800000/22.4

Xmol of air = 125000 moles

Step 2:

Determination of the pressure when the balloon is fully inflated .

This can be obtained as follow:

Number of mole (n) of air = 125000 moles

Volume (V) = 2800000 L

Temperature (T) = 120°C = 120°C + 273 = 393K

Gas constant (R) = 0.082atm.L/Kmol

Pressure (P) =.?

PV = nRT

Divide both side V

P= nRT/V

P= (125000x0.082x393) / 2800000

P = 1.44 atm

Therefore, the pressure of the air when the balloon is fully inflated is 1.44 atm

3 0
3 years ago
True or false. the arrow labeled C represents a transfer of chemical energy to mechanical energy. explain why this is true or fa
ArbitrLikvidat [17]
False, it’s not mechanical energy it’s thermal energy.
8 0
2 years ago
What is a "whale fall"
ira [324]

Answer:

its where a whale has died and the carcass of the whale sinks to the depth of the oceanic floor.

:) hope that helps

Explanation:

7 0
3 years ago
i need help in chemistry i will cash app money just please send me ur number i am going to fail my class
ohaa [14]

Answer:

Woah don't cash app whats the question

7 0
3 years ago
How many elements had been discovered by 1860
UkoKoshka [18]

60 elements! I don't exactly know every element known, so if you are asking that, please tell us, but what I do know is that there were 60 elements in the periodic table by 1860.

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3 years ago
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