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Anuta_ua [19.1K]
3 years ago
13

Which elements make up 96.3% of living things?

Chemistry
1 answer:
gulaghasi [49]3 years ago
6 0
Carbon, nitrogen, oxygen, and hydrogen
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Which change favors the products in this reversible reaction n2o4(g)+58 kj 2no2 (g)?
Ksenya-84 [330]

<span>According to Le Chatelier's Principle, the position of equilibrium moves to counteract the change, the position of equilibrium will move so that the concentration of products of chemical reaction increase, if:</span>

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4 years ago
how many grams of potassium chloride, KCL(molar mass is 74.55g/mol) are produced if 25 grams of potassium chlorate KClo^3 decomp
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Answer:

                     Mass = 15.20 g of KCl

Explanation:

                    The balance chemical equation for the decomposition of KClO₃ is as follow;

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Step 1: Calculate moles of KClO₃ as;

Moles = Mass / M/Mass

Moles = 25.0 g / 122.55 g/mol

Moles = 0.204 moles

Step 2: Find moles of KCl as;

According to equation,

                  2 moles of KClO₃ produces  =  2 moles of KCl

So,

               0.204 moles of KClO₃ will produce  =  X moles of KCl

Solving for X,

                       X = 2 mol × 0.204 mol / 2 mol

                       X = 0.204 mol of KCl

Step 3: Calculate mass of KCl as,

Mass = Moles × M.Mass

Mass = 0.204 mol × 74.55 g/mol

Mass = 15.20 g of KCl

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B) Water only dissolves other non-polar molecules.

<em>This option is wrong because water is a polar molecule and it can dissolve only other polar molecules.</em>

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