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2 years ago

13

Describe happens when you move any atom toward the positive nuclear charge.

1 answer:

bekas [8.4K]2 years ago

5 0

Answer:

Across a period, effective nuclear charge increases as electron shielding remains constant. A higher effective nuclear charge causes greater attractions to the electrons, pulling the electron cloud closer to the nucleus which results in a smaller atomic radius. ... This results in a larger atomic radius.

Explanation:

Now lets d8

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Na + H2 → NaCl balanced equation

hodyreva [135]

Answer:

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An example of a suspension is:<br> A. blood<br> B. gelatin<br> C. muddy water<br> D. milk

Shkiper50 [21]

ANSWER:A.blood

WHY: because it make the most sense and it seem right

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3 years ago

4 examples of Substances that sublime?

AVprozaik [17]

1. Dry Ice (solid carbon dioxide)

2. Iodine

3. Arsenic

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3 years ago

The acid dissociation constant Ka of boric acid (H3BO3) is 5.8 times 10^-10. Calculate the pH of a 4.4 M solution of boric acid.

madam [21]

Answer: The pH of a 4.4 M solution of boric acid is 4.3

Explanation:

$H_3BO_3\rightarrow H^+H_2BO_3^-$

at t=0 cM 0 0

at eqm $c-c\alpha$ $c\alpha$ $c\alpha$

So dissociation constant will be:

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

Give c= 4.4 M and $\alpha$ = ?

$K_a=5.8\times 10^{-10}$

Putting in the values we get:

$5.8\times 10^{-10}=\frac{(4.4\times \alpha)^2}{(4.4-4.4\times \alpha)}$

$(\alpha)=0.000011$

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

$[H^+]=4.4\times 0.000011=4.8\times 10^{-5}M$

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

$pH=-log[4.8\times 10^{-5}]=4.3$

Thus pH of a 4.4 M $H_3BO_3$ solution is 4.3

3 0

3 years ago

Which of the following is an incorrect name for an acid? A. acetic acid B. hydrocarbonate acid C. hydrocyanic acid D. sulfurous

just olya [345]

Answer:

The answer to your question is letter B

Explanation:

Incorrect name

A. acetic acid This name is correct for the acid with formula CH₃COOH

B. hydrocarbonate acid This is not the name for acid but for a molecule that has hydrogen and a metal.

C. hydrocyanic acid This name is correct for the inorganic molecule with formula HCN

D. sulfurous acid This name is correct and is the name of the inorganic molecule with formula H₂SO₃.

E. phosphoric acid This name is correct for the acid with formula H₃PO₄.

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3 years ago