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2 years ago

Use the E0 values of the following elements: Zn, Cu, Pb, and Al. Which element is the most active reducing agent?

Chemistry

1 answer:

Alenkinab [10]2 years ago

5 0

Answer:

Explanation:

The reduction potentials of the metals are

Al= -1.66

Zn= -0.76

Cu= +0.34

Pb= -0.13

Hence All has the most negative reduction potential and is the most reducing element among all the elements listed.

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I need this ASAP thank you

Rainbow [258]

Answer:

16,,24Mg 17,,a24.1 18a mass number of the most abundant isotope

Explanation:

atomic number of Mg is 12 ,therefore its mass number should be the value that is very close to 24.

24.1 is the value of thee most abundant isotope.

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1 year ago

A 0.15 m solution of chloroacetic acid has a ph of 1.86. What is the value of ka for this acid?

dem82 [27]

Answer: $1.67\times 10^{-3}$

Explanation:

$ClCH_2COOH\rightarrow ClCH_2COO^-+H^+$

cM 0 0

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

So dissociation constant will be:

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

Given: c = 0.15 M

pH = 1.86

$K_a$ = ?

Putting in the values we get:

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

$1.86=-log[H^+]$

$[H^+]=0.01$

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

$0.01=0.15\times \alpha$

$\alpha=0.06$

As $[H^+]=[ClCH_2COO^-]=0.01$

$K_a=\frac{(0.01)^2}{(0.15-0.15\times 0.06)}$

$K_a=1.67\times 10^{-3]$

Thus the vale of $K_a$ for the acid is $1.67\times 10^{-3}$

4 0

2 years ago

The atomic radius of a silver atom is 1.44 x 10-10. Give the

professor190 [17]

Answer:

0.144 nm

Explanation:

Silver's electronic configuration is (Kr)(4d)10(5s)1, and it has an atomic radius of 0.144 nm.

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2 years ago

Pcl5 exist but ncl5 does not.why?

jeyben [28]

N is as electronegative as Cl is. So Cl doesnt react with O, N

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2 years ago

It is primarily used as energy storage found in the cell membrane

Gnesinka [82]

Answer:

ATP—Adenosine triphosphate, a nucleotide which is the most important short-term energy storage compound in cells. It is the “energy currency” of the cell, necessary for practically all metabolic activities. Carbohydrate—A type of organic molecule made of carbon, hydrogen, and oxygen.

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1 year ago