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navik [9.2K]
2 years ago
11

Please answer my questions. I really need them soon. I will post the links for other questions in the comments.

Chemistry
1 answer:
Assoli18 [71]2 years ago
6 0

Explanation:

option option B is the correct answer of given statement helium-4(He)=2

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A gas that has a volume of 28 liters, a temperature of 45C, And an unknown pressure has its volume increased to 34 liters and it
patriot [66]

Answer:

P1 = 2.5ATM

Explanation:

V1 = 28L

T1 = 45°C = (45 + 273.15)K = 318.15K

V2 = 34L

T2 = 35°C = (35 + 273.15)K = 308.15K

P1 = ?

P2 = 2ATM

applying combined gas equation,

P1V1 / T1 = P2V2 / T2

P1*V1*T2 = P2*V2*T1

Solving for P1

P1 = P2*V2*T1 / V1*T2

P1 = (2.0 * 34 * 318.15) / (28 * 308.15)

P1 = 21634.2 / 8628.2

P1 = 2.5ATM

The initial pressure was 2.5ATM

3 0
2 years ago
5.Are pure solids included in equilibrium expressions? Explain your answer.
tatiyna

Answer:

Pure solids or liquids are excluded from the equilibrium expression because their effective concentrations stay constant throughout the reaction. The concentration of a pure liquid or solid equals its density divided by its molar mass.

Explanation:

Hope this helps!!!

8 0
2 years ago
The cost of 1kg of potatoes is $8. What is the cost of 15 kg of potatoes? (hurry pls)
Ostrovityanka [42]
It’s 8•15 which is 120 kg of potatoes
6 0
2 years ago
Read 2 more answers
Noin
OLga [1]

Answer:

Gravity is the answer.

5 0
2 years ago
How many plague hearts can be in one map at a time state of decay 2?
disa [49]

Answer : 10 plague hearts are there in one map at a time in state of decay 2


Explanation : The State of Decay 2 consists of 10 Plague Hearts which one needs to destroy and they are placed on randomly dotted areas around the map inside a searchable location on it.


With each heart that one destroys, the remaining other ones become a little bit tougher and are more heavily guarded by the undead people.

6 0
2 years ago
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