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BigorU [14]
3 years ago
8

help please this is a major grade (my birthday is next week) if i dont pass i wont celebrate my birthday please help!

Chemistry
1 answer:
Olenka [21]3 years ago
4 0

Answer:

The answer to the question is C

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Halppp can anyone come up with a slogan for anti smoking
PtichkaEL [24]

Answer:

"Your Choice: Liberation From Your Own Choices or Continue the Choice That Decreases Your Liberation."

Explanation:

Liberation is the freeing or release from something restraining you. In this case, smoking holds you back from doing the things you used to do.

It's not that creative, but I hope this is good enough for you! :D (don't smoke)

5 0
2 years ago
How many moles of air must escape from a 10-m  8.0-m  5.0-m room when the temperature is raised from 0c to 20c? assume the p
slega [8]
Data:

p = 1 atm
V = 10 m * 8 m * 5 m = 400 m^3 = 400,000 liter

To = 0 + 273.15K = 273.15K
Tf = 20 + 273.15K = 293.15K

No - Nf =?

2) Formula

pV = NRT => N = pV / (RT)

3) solution

No = pV / (RTo)

Nf = pV / (RTf)

=> No - Nf = [pv / R] [ 1 / To - 1 / Tf ]

=> No - Nf = [1atm*400,000liter / 0.0821 atm*liter/K*mol ] [ 1 / 273.15 - 1 / 293.15]

No - Nf = 1216.9 moles ≈ 1217 moles

Answer: 1217 moles
3 0
3 years ago
Question 10 (1 point)
Vinil7 [7]

Answer:

A,C,D,B

Explanation:

1killometer=1000m

1mm=0.001m

1cm=0.01m

base unit of length is meter

7 0
3 years ago
How many valance electrons does He need to get to 8
mote1985 [20]

Answer:

Any element in group 18 has eight valence electrons (except for helium, which has a total of just two electrons

5 0
3 years ago
Which equation agrees with the ideal gas law? mc005-1.jpg mc005-2.jpg mc005-3.jpg mc005-4.jpg
AlexFokin [52]
The ideal gas equation is pV = nRT


From that you can derive several equations, depending on which variables are fixed.


1) When n and T are fixed:

pV = nRT = constant


pV = constant => p1 V1 = p2 V2 => p1 / V2 = p2 / V1 ---> Boyle's Law


2) When n and V are constant:


p / T = nR/V = constant


p / T = constant => p1 / T1 = p2 / T2  ----> Gay - Lussac's Law


3) when n and p are constant


V / T = nR/p = constant   


V / T = constant => V1 / T1 = V2 / T2 ---> Charles' Law


4) When only n is constant


pV / T = nR = constant


pV / T = constant => p1 V1 / T1 = p2 V2 / T2 ----> Combined gas law.



There  you have the four equations that agree with the ideal gas law.  
7 0
3 years ago
Read 2 more answers
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