1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Andrei [34K]
4 years ago
5

Please help in Chemistry!!!! 15 points! I added a picture below...

Chemistry
2 answers:
aleksandr82 [10.1K]4 years ago
7 0
Yeah, the answer would be choice B because it drops from 40 to 20 so it's -20
krek1111 [17]4 years ago
5 0
The answer would be choice B because the energy decreased by 20 J
You might be interested in
What is the relationship between a scientific theory and a scientific law
grigory [225]
A scientific theory focuses on explaining a phenomenon, while a law will have a generalised statement about said phenomenon. Often times, we use laws to help us develop theories. =)
5 0
3 years ago
If you found a piece of iron on the ground and it was determined that it came from outer space, what would you have found?
netineya [11]
You have likely found B. a meteorite. Hope this helps!
5 0
4 years ago
Read 2 more answers
Calculate the frequency of radiation with a wavelength of 1.08 x 10^-6 m. simple explanation please​
pishuonlain [190]
C = vf
c stands for the speed of waves (which is a constant that is 3 x 10^8)
v stands for the wavelength (which is given)
f stands for frequency (what we are solving for)
3 x 10^8 = (1.08 x 10^-6)f
Divide both sides by the given wavelength
f = 2.78 * 10^14 seconds
8 0
3 years ago
Count the total number of atoms in NaCl:
erastova [34]
Two atoms total are in NaCl.
6 0
3 years ago
Read 2 more answers
Air trapped in a cylinder fitted with a piston occupies 145.7 mL at 1.08 atm pressure.
tigry1 [53]
What is the new fil what is the new volume win the piston is depressed increase the pressure by 25 50
5 0
3 years ago
Other questions:
  • Magnified we see that the carbon atom _______ in place. flashcard
    13·1 answer
  • Type of change that produces a new substance
    5·2 answers
  • What is the answer to the problem: 2.87 m x 12.31 m x 0.32 m?
    14·2 answers
  • 4. What is the rarest element that is natural to earth?
    12·2 answers
  • 234+34.1 add and round to 2 significant figures
    7·1 answer
  • How to combine elements to make compounds?
    13·1 answer
  • The water at the upper part boils but the ice cubes
    5·1 answer
  • A sample of damp air in a 1.00 L container exerts a total pressure of 741.0 torr at 20 oC; but when it is cooled to -10 oC, the
    9·1 answer
  • Al(OH)3 + 3HCl= AlCl3 + blank
    5·1 answer
  • What is a control group used for?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!