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3 years ago

Determine the number of protons, neutrons, and electrons for a neutral potassium-41 isotope.

1 answer:

6 0

Atomic number is equal to the number of electrons in a neutral atom. ... Niobium has an atomic number of 41. ... Determine the number of protons, electrons, and neutrons for each isotope described ... Potassium-41. 19

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Determine the pH of a 0.500 M HNO2 solution. Ka of HNO2 is 4.6 * 10-4.

Lostsunrise [7]

Answer: pH of solution is = 1.82

Explanation:

$HNO_2\rightarrow H^+NO_2^-$

cM 0 0

$c-c\alpha$ $c\alpha$ $c\alpha$

So dissociation constant will be:

$K_a=\frac{(c\alpha)^{2}}{c-c\alpha}$

Give c= 0.500 M and $\alpha$ = ?

$K_a=4.6\times 10^{-4}$

Putting in the values we get:

$4.6\times 10^{-4}=\frac{(0.500\times \alpha)^2}{(0.500-0.500\times \alpha)}$

$(\alpha)=0.030$

$[H^+]=c\times \alpha$

$[H^+]=0.500\times 0.030=0.015$

Also $pH=-log[H^+]$

$pH=-log[0.015]=1.82$

Thus pH of a 0.500 M $HNO_2$ solution is 1.82

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3 years ago

How much Magnesium is contained in 35.0g of Magnesium Chloride?

Yanka [14]

Answer:

There are

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3 years ago

Why does the less reactive ion participate in electrolysis, instead of the higher reactive metal??

GuDViN [60]

Answer:

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4 years ago

What makes the periodic table such a useful tool? *

Sidana [21]

Answer:

I think it is D. It allows you to compare the properties of the elements. I might be wrong.

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jek_recluse [69]

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