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Anika [276]
3 years ago
15

Need help asap got 5 minutes

Chemistry
1 answer:
mojhsa [17]3 years ago
4 0
The answer is A. Oxygen
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There can only be two electrons in the innermost shell of an atom so b is the correct answer
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What is the mass of a 300 ml sample of gaseous hydrogen chloride at 2.0 atm and 30c?
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(2 atm)(.3 liters) = n(8.314 mol*K)(303°K)

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Divide by 2519.142

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Explanation:

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7 0
3 years ago
Potassium chlorate decomposes into potassium chloride and oxygen gas. How many grams of oxygen are produced when 1.06 grams of p
kifflom [539]

The amount of oxygen that are produced when 1.06 grams of potassium chlorate decompose completely is 0.64 grams.

<h3>What is the relation between mass & moles?</h3>

Relation between the mass and moles of any substance will be represented as:

  • n = W/M, where
  • W = given mass
  • M = molar mass

Moles of potassium chlorate = 1.66g / 122.5g/mol = 0.0135mole

Given chemical reaction is:

2KClO₃ → 2KCl + 3O₂

From the stoichiometry of the reaction, it is clear that:

2 moles of KClO₃ = produces 3 moles of O₂

0.0135 moles of KClO₃ = produces (3/2)(0.0135)=0.02 moles of O₂

Mass of oxygen = (0.02mol)(32g/mol) = 0.64 g

Hence produced mass of oxygen is 0.64 grams.

To now more about mass & moles, visit the below link:
brainly.com/question/18983376

#SPJ1

5 0
2 years ago
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