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QveST [7]
3 years ago
11

Which of these is a common to all chemical changes

Chemistry
2 answers:
Kamila [148]3 years ago
5 0
C. A new substance is produced. All others are physical changes.
KiRa [710]3 years ago
3 0

Answer:

c

a new substance is produced

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What is the volume occupied by 3.70 moles of n2 gas at stp?
melisa1 [442]
The conversion factor for volume at STP is \frac {1mol}{22.4L} or \frac{22.4L}{1mol}. Since we want volume, we would use \frac{22.4L}{1mol}. We conclude with the following calculations:

3.70molN_{2} * \frac {22.4LN_{2}}{1mol N_{2}} = 82.88LN_{2}

The answer is 82.88L N2
7 0
3 years ago
What is the pOH if the pH is 11?
Kobotan [32]

Answer:

3

Explanation:

14-11=3

- Hope that helps! Please let me know if you need further explanation.

6 0
3 years ago
What are the major characteristics of Florida's three landform regions?(Northern highlands,Central highlands and the coastal low
tamaranim1 [39]
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3 years ago
Which of the following values best classifies a bond between 2 atoms as<br> being covalent?
Genrish500 [490]

Answer:

C. An electronegativity difference of less than 1.7 between the atoms

Explanation:

I have no idea but that’s correct I just answered it on apex

5 0
3 years ago
A mixture of 1.20 mols He, 2.40 mols Ne, 4.80 mols Kr, and 0.60 mols Ar has a total pressure of 600.0 mm Hg. What is the partial
Juliette [100K]

Answer: The partial pressure of the Kr is 320 mm Hg.

Explanation:

According to Raoult's Law , the partial pressure of each component in the solution is equal to the total pressure multiplied by its mole fraction. It is mathematically expressed as

p_A=x_A\times P_{total}

where, p_A = partial pressure of component A

x_A = mole fraction of A

P_{total} = total pressure

mole fraction of Krypton = \frac{\text {Moles of Kr}}{\text {total moles}}=\frac{4.80}{1.20+2.40+4.80+0.60}=0.53

p_{Kr}=0.53\times 600mmHg=320mmHg

Thus partial pressure of the Kr is 320 mm Hg

8 0
3 years ago
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