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Greeley [361]
2 years ago
14

Why is it necessary to specify temperature when giving Ka value​

Chemistry
1 answer:
Yuliya22 [10]2 years ago
5 0

Answer:

Because the equilibrium constant is only at constant at temperature. Changing the temperature changes the Ka.

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The compound adrenaline contains 56.79% c, 6.56% h, 28.37% o, and 8.28% n by mass. what is the empirical formula for adrenaline?
Phoenix [80]
To determine the empirical formula of the compound given, we need to determine the ratio of each element in the compound. To do that we assume to have 100 grams sample of the compound with the given composition. Then, we calculate for the number of moles of each element. We do as follows:<span>
         mass        moles
C       56.79        4.73
H       6.56          6.50
O       28.37        1.77
N      8.28           0.59

Dividing the number of moles of each element with the smallest value, we will have the empirical formula:

</span>         moles                 ratio
C       4.73     / 0.59       8
H       6.50     / 0.59      11
O       1.77     / 0.59       3
N        0.59    / 0.59       1<span>
</span><span>
The empirical formula would be C8H11O3N.</span>
8 0
3 years ago
True or false
Kaylis [27]

Answer:

True

Explanation:

<em>Forces</em>, <u>equal in magnitude and opposite in direction</u>, and cancel each other out are called Balanced Forces.

<em>Balanced Forces</em> DO NOT cause any change in the velocity of the object, but the Object may correspond to a change in shape or size.

Example :

<em>Blasting a balloon by compressing it tightly with both hands, roughly with an equal force, is a practical example of Balanced Forces. In this case, the balloon before the burst stays at a state of rest and same after the burst. But the burst or the compression, causes a change in the shape of the balloon.</em>

8 0
3 years ago
What three things does the atomic number of an element tell us?
ira [324]

Answer:

the number of protons in the nucleus of an atom. the number of protons define the identity of an element

3 0
1 year ago
The metals in Groups 1A, 2A, and 3A ____. a. gain electrons when they form ions c. all have ions with a 1+ charge b. all form io
vagabundo [1.1K]
4A I think I'm sorry if it is wrong
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3 years ago
Improper or incomplete usage of citations can lead to
lys-0071 [83]
Improper or incomplete usage of citations can lead to plagiarism.

Without proper usage of citations, teachers or whoever is looking over your work, may think because you do not hold acceptable citations, that they will think it is plagiarized. Plagiarism is taking another person's work or ideas without citing it. Citation or direct quotation could save you from plagiarism. 
5 0
3 years ago
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