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Aleks04 [339]
3 years ago
13

The amount of energy needed to change a material from a solid to a liquid is heat of

Chemistry
1 answer:
GalinKa [24]3 years ago
7 0
It revolves around Physical change.  I learned this in class today.

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The concentration of potassium cyanide (KCN) in a sample of water is 9.65 x 10-7 M. Assume the density of
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The concentration in ppm is 0.06 ppm

<h3>How to convert to PPM?</h3>

There are several unit of concentration in chemistry. Let us recall that concentration is the amount of substance that is present in a solution. Thus we have;

Concentration = 9.65 x 10-7 M

Molar mass of potassium cyanide = 65 g/mol

Thus;

M = ppm/MM * 1000

M = molar concentration

MM = molar mass

M * MM * 1000 = ppm

ppm = 9.65 x 10-7 M * 65 g/mol * 1000

ppm = 0.06 ppm

Learn more about ppm:brainly.com/question/16727593

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2 years ago
Which of these phrases accurately describe disproportionation? Check all that apply. A single compound reacts with itself. A sin
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A single compound reacts with itself.

Explanation:

Disproportionation is a chemical reaction,most times a redox reaction, in which a molecule is transformed into two or more dissimilar products. In a disproportionation reaction, the species are simultaneously oxidized and reduced to form at least two different products.

A typical example of a specie that disproportionate is the copper I ion as shown below;

2Cu^+(aq) ------> Cu(s) + Cu^2+(aq)

The two oxidation states of copper formed in the disproportionation are Cu(0) and copper (II).

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