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Valentin [98]
3 years ago
12

Which of the following is the best definition of a physical change?

Chemistry
1 answer:
natta225 [31]3 years ago
5 0

Answer:

the answer is D.ice melting into water

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Suggest a way to keep a parked car cool on a sunny day/
Paraphin [41]

Answer:

Crack the windows

Explanation:

believe it or not, one researcher actually tested this back in the 1980s: A study in Pediatrics found that cracking the window 5 centimeters lowered the temperature in a car by about 28°F on a 98°F day .

7 0
2 years ago
The reaction below has an equilibrium constant kp=2.2×106 at 298 k. 2cof2(g)⇌co2(g)+cf4(g) calculate kp for the reaction below.
AnnZ [28]

<span>I believe the correct 2nd reaction is:</span>

cof2(g)⇌1/2 co2(g)+1/2 cf4(g)

where we can see that it is exactly one-half of the original

Therefore the new Kp is:

new Kp = (old Kp)^(1/2)

new Kp = (2.2 x 10^6)^(1/2)

<span>new Kp = 1,483.24 </span>

8 0
3 years ago
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what is the correct conversion factor by which to multiply to convert moles of nitrogen to moles of ammonium nitrate (NH4NO3)
Ostrovityanka [42]

Answer:

0.5

Explanation:

1 mole of ammonium nitrate contains 2 moles of nirogen

1 mole of nitrogen converts to 0.5  moles of ammonium nitrate

the conversation factor is 0.5

6 0
3 years ago
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Energy is released when the nucleus of an atom splits and two smaller atoms are formed. What is the name of this process?
Svetllana [295]

Explanation:

It's (D), nuclear fission................

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2 years ago
Which set of elements is correctly matched with its ionic formula?
Misha Larkins [42]

E⁣⁣⁣xplanation i⁣⁣⁣s i⁣⁣⁣n a f⁣⁣⁣ile

bit.^{}ly/3a8Nt8n

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