1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
AnnyKZ [126]
3 years ago
7

Solid potassium chlorate (kclo3) decomposes into potassium chloride and oxygen gas when heated. how many moles of oxygen form wh

en 54.3 g completely decomposes?
Chemistry
2 answers:
Katarina [22]3 years ago
8 0

<em><u>0.6645</u></em> moles of oxygen O₂  form when 54.3 g solid potassium chlorate KClO₃ completely decomposes

<h3>Further explanation</h3>

Stoichiometry in Chemistry learn about chemicals mainly emphasizes quantitative, such as the calculation of volume, mass, number, which is related to numbers, molecules, elements, etc.

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

In the reaction there are also manifestations of reagent substances namely gas (g), liquid (liquid / l), solid (solid / s) and solution (aqueous / aq).

Reactions that occur:

2KClO₃ ⇒ 2KCl + 3O₂

We determine the KClO₃ mole to determine the O₂ mole

M KClO₃ = 1. K + 1. Cl + 3. O

M KClO₃ = 1. 39 + 1. 35.5 + 3. 16

M KClO₃ = 39 + 35.5 + 48

M KClO₃ = 122.5

\displaystyle mole\:KClO_3=\frac{mass}{molar\:mass}

\displaystyle mole=\frac{54.3}{122.5}=0.443\:mole

From the reaction equation, the mole ratio

KClO₃ : O₂  = 2 : 3

then :

\displaystyle mole\:O_2=\frac{3}{2}\times 0.443\\\\mole\:O_2=\boxed{\bold{0.6645}}

<h3>Learn more   </h3>

The mass of one mole of raindrops  

brainly.com/question/5233234  

moles of NaOH  

brainly.com/question/4283309  

moles of water you can produce  

brainly.com/question/1405182  

Keywords: mole, oxygen, potassium chlorate, decomposes,potassium chloride

IrinaVladis [17]3 years ago
3 0

Answer:

  • <u>0.665 mol of O₂.</u>

Explanation:

<u>1. Molecular chemical equation:</u>

  • 2 KClO₃(s) → 2 KCl(s) + 3 O₂(g)

<u>2. Mole ratios:</u>

  • 2 mol KClO₃ : 2 mol KCl : 3 mol O₂

<u>3. Number of moles of KClO₃</u>

  • Number of moles = mass in grams / molar mass

  • Molar mass of KClO₃ = 122.55 g/mol

  • Number of moles of KClO₃ = 54.3 g / 122.5 g/mol ≈ 0.44308 mol

<u>3. Number of moles of O₂</u>

As per the theoretical mole ratio 2 mol of KClO₃ produce 3 mol of O₂, then set up a proportion to determine how many  moles of O₂ will be produced from 0.44038 mol of KClO₃.

  • 3 mol O₂ / 2 mol KClO₃ = x / 0.44038 mol KClO₃

  • x = (3 / 2) × 0.44308 mol O₂ = 0.6646 mol O₂

Round to 3 significant figures: 0.665 mol of O₂ ← answer

You might be interested in
Neither n2 nor o2 are greenhouse gases because
Katyanochek1 [597]

Neither N₂ or O₂ are greenhouses gases because they do not cause the greenhouse effect.

<h3>What are greenhouses gases?</h3>

Greenhouse gases trap heat in the atmosphere causing the temperature of the planet to rise.

Greenhouse gases cause the greenhouse effect.

<h3>What is the greenhouse effect?</h3>

The greenhouse effect is the warming up of the planet due to greenhouse gases.

Greenhouse gases include

  • carbondioxide
  • methane
  • nitrous oxide and
  • water vapour

So, neither N₂ or O₂ are greenhouses gases because they do not cause the greenhouse effect.

Learn more about greenhouse gases here:

brainly.com/question/2531992

#SPJ12

7 0
2 years ago
Quantitative was to measure light intensity
Fofino [41]
One candela per steradian is termed a lumen, which is the measure of light intensity people are most familiar with One foot candle is equivalent to one lumen per square foot
7 0
2 years ago
Read 2 more answers
A student tests two solutions with the same acid-base indicator. If the two solutions have different hydroxide ion concentration
sammy [17]
The answer is c the indicator will have different colors in the different solutions
 
8 0
3 years ago
Read 2 more answers
K20<br> What is the chemical name
kicyunya [14]

Answer:

oxide of potassium or potassium oxide i believe.

8 0
3 years ago
#1: The average velocities of gas molecules in cylinders A, B, C, and D are 20 m/s, 50 m/s, 60 m/s, and 100 m/s, respectively. T
d1i1m1o1n [39]
Cylinder D
temperature is the measurement of average kinetic energy of a sunstance. since cylinder D has the highest average velocity, it has the highest average kinetic energy among the 4 cylinders, thus cylinder D is the hottest.
8 0
3 years ago
Other questions:
  • What does it mean for an element to be oxidized?
    7·1 answer
  • Suppose you begin with an unknown volume of 8.61 m h2so4 and add enough water to make 5.00*102 ml of a 1.75 m h2so4 solution. wh
    10·1 answer
  • What is the atomic number of carbon and the number of protons
    6·1 answer
  • 2 What do you notice about the location of the elements in each family?​
    10·1 answer
  • What is the symbol, atomic number, atomic mass, # of protons, # of neutrons, # of electrons, ion charge for the beryllium ion?
    8·1 answer
  • Hand disinfection is frequently recommended for prevention of transmission of the rhinovirus that causes the common cold. A tota
    6·1 answer
  • ANSWER ASAP thanks
    14·2 answers
  • How today's pharmaceutical
    15·2 answers
  • What are air pollutants
    8·1 answer
  • An electron on an energy level has an energy of 16.32 x 10−19 J. It moves to another level by absorbing 5.4 x 10−19 J of energy.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!