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VladimirAG [237]
3 years ago
7

Define the "half-life" of a radioisotope

Chemistry
1 answer:
elena55 [62]3 years ago
8 0
The amount of time it takes for 1/2 of it to decay or dissapear

this is liike compound interest because it takes the same amount of time to decay 1/2 of it, regardless of the amount

example

lets say half life of element x is 1 year
if yo has 32 grams, after  1 year, it decays to 16g
2 years decays to 8
3 years decays to 4
4 years decays to 2
5 years decays to 1
etc

hope this helps (I'm not the best at chem)
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3 years ago
When 100. mL of 6.00 M HCl is diluted to 300. mL, the final concentration is ________.
Marat540 [252]

Answer:

2.00 M

Explanation:

The concentration of a solution is given by

M=\frac{m}{V}

where

m is the mass of solute

V is the volume of the solution

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M = 6.00 M is the concentration

V = 100 mL = 0.1 L is the volume

So the mass of solute (HCl) is

m=MV=(6.00)(0.1)=0.6g

Then, the HCL is diluted into a solution with volume of

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Therefore, the final concentration is:

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3 0
4 years ago
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3 years ago
What is the percent by mass of 54.7g of calcium chloride dissolved in 500g of water?
Advocard [28]
% by mass = (mass solute/mass solution)*100%
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Answer:

Explanation:

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