2 years ago

How many of the elements are radioactive?

Chemistry

1 answer:

Karolina [17]2 years ago

7 0

Answer:

uwu

Explanation:

Because I like UwU cats, are you one?

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How many moles are in 9.8 x 1024 atoms of calcium?

Ratling [72]

Explanation:

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= (9.8×10^24) ÷ (6.02×10^23)

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3 years ago

Valeric acid, HC5H9O2 (Ka = 1.5 ✕ 10−5), is used in the manufacture of magnesium valerate, a nerve-calming agent. What is the hy

Studentka2010 [4]

Answer:

$[H^+]=0.00332M$

Explanation:

Hello,

In this case, considering the dissociation of valeric acid as:

$HC_5H_9O_2 \rightleftharpoons C_5H_9O_2 ^-+H^+$

Its corresponding law of mass action is:

$Ka=\frac{[H^+][C_5H_9O_2^-]}{[HC_5H_9O_2]}$

Now, by means of the change $x$ due to dissociation, it becomes:

$Ka=\frac{(x)(x)}{0.737-x}=1.5x10^{-5}$

Solving for $x$ we obtain:

$x=0.00332M$

Thus, since the concentration of hydronium equals $x$ , the answer is:

$[H^+]=x=0.00332M$

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3 years ago

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the answer you are looking for is 4.22 kj.

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How many of the elements are radioactive￼?

How many of the elements are radioactive?