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vichka [17]
3 years ago
9

Which equation correctly relates the heat of reaction to the standard heats of formation?

Chemistry
1 answer:
VARVARA [1.3K]3 years ago
4 0

Answer:

D

Explanation:

∆H° = ∆Hf ° (products) – ∆Hf ° (reactants)

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This type of fatty acid has at least one double bond in the carbon-to-carbon chain and also contains protective qualities
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There are two general classifications of fatty acids according to their structure: saturated and unsaturated fatty acids. Unsaturated fatty acids are those that contain at least one of either a double or triple bond. Therefore, the answer to this questions is: unsaturated fatty acid. Its function is to protect the organs as a cushion, or as storage area for excess energy.
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What are downbursts?
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3 0
3 years ago
Perform the following calculation, 39 / 24.2 . The answer rounded to the correct number of significant figures is which of the f
levacccp [35]

Answer:

Hey!

39 / 24.2 = 943.8

Explanation:

943.8 to 2 s.f (best option for rounding)

= 940

ANSWER = 940

HOPE THIS HELPS!

4 0
3 years ago
One acid, HA, has a pKa of 3.16 and another, HB, has a pKa of 4.14. Which is the stronger acid and why?
dezoksy [38]
PKa is defined as the logarithm of the inverse of Ka, i.e


pKa = log ( 1 / Ka)


Ka is the dissociation constant of the acid. The larger Ka the stronger the acid.


On the other hand, from pKa = log (1 / Ka) the larger Ka the smaller 1 /Ka, and so the smaller log (1/Ka).


So, the relation between Ka and pKa is inverse, which means that an acid with greater value of pKa will have lower value Ka, and so it will be  weaker or the smaller the pKa the stronger the acid.  


Therefore, in our case HA has the lower pKa ant it will be the stronger acid.



Answer: HA is the stronger acid, because it has the lower pKa and pKa is inversely related to the strength of the acid.

5 0
3 years ago
1.what type of power generation can cause air pollution
timofeeve [1]

1.Natural gas(B)

2.Oil(C)

3.Fossil Fuels(A)

4.Increased Greenhouse Gases(D)

hope this helps

<u>(if you in k12 this is right)</u>

7 0
2 years ago
Read 2 more answers
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