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Arte-miy333 [17]
3 years ago
15

Which statement describes the periodic law?

Chemistry
2 answers:
Monica [59]3 years ago
7 0

elements is the same group have similar chemical properties

mr_godi [17]3 years ago
3 0
Answer is: elements in the same group have similar chemical properties.
Periodic law<span> is the arrangement of the </span>elements<span> in order of increasing atomic number.
</span>For example all alkaline metals (I group of periodic table, Na, K, Cs...) loose one electron in chemical reaction and react vigorously with water.
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Answer:

Keiko should mix 20 mL 1% solution and 80 mL 6% solution for to make 100 mL 5% solution

Explanation:

There are 2 unknown values X= mL 6% solution and Y=1% solution. So, we need 2 equations:

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When clearing X and Y :

(X mL 6%    +   Y mL 1%      =    100 mL 5%) (-15,7)

X mL 94%  +   Y mL 99%   =   100 mL 95%

_______________________________

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Replace Y in anyone equation and X = 80 mL 6% solution

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3 years ago
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If the density of water is 1g/ml, what is the mass of 254ml of water?
Mariulka [41]
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