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lesya692 [45]
3 years ago
7

(will give brainliest!! please help me! thank you!)

Chemistry
1 answer:
just olya [345]3 years ago
6 0

Answer:

A two energy levels K and L

B halogen are present in group 17

C in same group elements have same valence electrons

Explanation:

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Blababa [14]

Explanation:

what's li and na stand for ?

3 0
3 years ago
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What mass of mgf2 is contained in 80.85 g of a 22.4% by mass solution of mgf2 in water?
Aleks [24]
Formula: % by mass = (mass of solute / mass of solution] *100

Data:

mass of solution = 80.85 g

% by mass = 22.4%

Unknown = mass of solute

Solution

% by mass = (mass of solute / mass of solution] *100 = >

mass of solute = % by mass * mass of solution / 100

mass of solute = 22.4 * 80.85 / 100 = 18.11 g

Answer: 18.11 g
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3 years ago
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If 81g of water is measured out, how many moles are in the sample? *
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Answer:

D

Explanation:

because moles = mass /mr

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7 0
3 years ago
Is zn2+ a transition metal?​
4vir4ik [10]

Answer:

Yes.

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Zn2+ is the zinc ion in aqueous solution.

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7 0
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Why are weight and mass used synonymously on Earth?
RUDIKE [14]
Actually mass and weight are two different things but most people did not understand the difference between them. And they are used synonymously on the earth. Mass is the measure of the amount of matter and weight is the measure of how the force of gravity acts on the mass that is Weight = mass x force of gravity. And they are also directly proportional to each other that is also the reason both terms are used synonymously.

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