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zysi [14]
3 years ago
12

Please help y’all I don’t understand

Chemistry
2 answers:
VashaNatasha [74]3 years ago
6 0

Answer:

D.

Explanation:

You try to get 8 electron on the outermost "shell" so you have no left over or "valence" electrons.

Ganezh [65]3 years ago
3 0
D because octet means 8
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In fractional distillation, liquid can be seen running from the bottom of the distillation column back into the distilling flask
shepuryov [24]

Answer:

substances with a higher boiling point are returning back to the flask which allows another substances with the specific context temperature (lower boiling point) to boil over and be purified.

Explanation:

The reason it happens because the lower boiling point substance vaporizes and crosses over while the other substance is waiting for its boiling point to reach

7 0
2 years ago
A- is a weak base. which equilibrium corresponds to the equilibrium constant ka for ha?
vekshin1

Answer:

K_a=\frac{[H^+][A^-]}{[HA]}

Explanation:

ka is defined as the dissociation constant of an acid. It is defined as the ratio of concentration of products to the concentration of reactants.

For the dissociation of weak acid, the chemical equation follows:

HA\rightleftharpoons H^++A^-

The equilibrium constant is defined by the equilibrium concentration of products over reactants:

K_a=\frac{[H^+][A^-]}{[HA]}

5 0
2 years ago
If a calcium supplement claims to have 200 mg of calcium per pill - how much mass if each pill if the supplement is a calcium su
arlik [135]

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Explanation:

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7 0
2 years ago
If a substance has a half life of 45 days, how much of the original substance would be left after 90 days?
Fofino [41]
U would subtract 90 minus 45 which equals 45
8 0
3 years ago
Help please giving brainliest
Kitty [74]

Answer:

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Explanation:

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8 0
3 years ago
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