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svet-max [94.6K]
2 years ago
7

Could someone please help me? You can ignore number 3:)

Chemistry
1 answer:
il63 [147K]2 years ago
6 0

Answer:

Question 2: Because the elements could be unstable, forming elemental compounds.

Question 1: Water is made up of Hydrogen and oxygen, which is namely called H2^o What makes it a pure substance is the little mass and molecules it's made up of.

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How many kilograms of potassium iodide (ki) are needed to make 1.25 l of a 4.41 m ki solution?
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C = n/V
n = C×V
n = 4,41M × 1,25L
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1 mol --------- 166g
5,5125 mol --- X
X = 166×5,5125 = 915,075g KI

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