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umka21 [38]
3 years ago
6

PLEASE HELP!

Chemistry
1 answer:
Anon25 [30]3 years ago
4 0

Answer:

C. Mole

Explanation:

Chemical formula deals with mole number

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It is also one of seven wonders of the world that is under world heritage. Pyramids where only found in Egypt and nowhere else.


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Which best describes the transfer of heat energy through conduction? A. Heat energy is transferred from molecule to molecule by
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What is the molar concentration of 5% acetic acid?
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Describe each of the following as a physical or chemical property.
lidiya [134]

Explanation:

Physical change -

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From the options given in the question,

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7 0
3 years ago
Given that kb for c6h5nh2 is 1.7 × 10-9 at 25 °c, what is the value of ka for c6h5nh3 at 25 °c?
lina2011 [118]

Answer: k_a for C_6H_5NH_3^+ at 25°C is 0.588\times 10^{-4}

Explanation: We are given k_b of C_6H_5NH_2 at 25°C which is 1.7\times 10^{-9}

To calculate the k_a of C_6H_5NH_3^+, we use the formula:

k_w=k_a\times k_b

k_w\text{ at }25^o=1\times 10^{-14}

Putting values in above equation, we get:

1\times 10^{-14}=k_a\times (1.7\times 10^{-9})\\k_a=0.588\times 10^{-5}

7 0
3 years ago
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