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
Tanya [424]
3 years ago
13

How many grams of KO2 are needed to form 8.0 g of O2?

Chemistry
2 answers:
dem82 [27]3 years ago
4 0
Using the atomic weights, K = 39, O=16 so KO2= 39+32=71. So K=39/71= 0.549 of KO2 and O2=32=0.45KO2 and O2=8g and 0.45KO2=8g so KO2=8/0.45=17.77g. So to check, K=0.549 x 17.77g=9.76 and so K+O2= 9.76+8g=17.76.
zubka84 [21]3 years ago
4 0

23.43 grams of KO₂ is needed to form 8.0 g of O₂

<h3>Further explanation</h3>

Stochiometry in Chemistry learns about chemical reactions mainly emphasizing quantitative, such as calculations of volume, mass, number, which are related to the number of actions, molecules, elements, etc.

In chemical calculations, the reaction can be determined, the number of substances that can be expressed in units of mass, volume, mole, or determine a chemical formula, for example, the substance level or molecular formula of the hydrate.

The reaction equation is the chemical formula of reagents and product substances

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

The reaction between potassium superoxide, KO₂, and CO₂, to get O₂, is usually used by rescue teams in the form of breathing equipment

4KO₂ + 2CO₂ → 2K₂CO₃ + 3O₂

From the above equation the reaction shows that for every 4 moles of KO₂ you will get 3 moles of O₂, or a ratio of moles of KO₂: moles of O₂ = 4: 3

If we want to get 8 grams of O₂, then the number of moles of O₂ becomes:

mole O₂ = gram: molecular mass of O₂

mol O₂ = 8 gram: 32

mol O₂ = 0.25

so the number of KO₂ moles needed: (we use a ratio of KO₂ and O₂ moles)

mol KO₂ = 4/3 x mol O₂

KO KO2 = 4/3 x 0.25

mol KO2 = 0.33 mol

So the number of grams of KO₂ needed

gram KO₂ = mol x molecular mass KO₂

gram KO₂ = 0.33 x 71

gram KO₂ = 23.43

<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, KO₂, O₂, breathing equipment

You might be interested in
If the copper is drawn into wire whose diameter is 9.50 mm, how many feet of copper can be obtained from the ingot? The density
ankoles [38]

Answer:

The length of the wire = 352.66 feet.

Explanation:

A copper refinery produces a copper ingot weighing 150 lb. If the copper is drawn into wire whose diameter is 9.50 mm, how many feet of copper can be obtained from the ingot? The density of copper is 8.94 g/cm3. (Assume that the wire is a cylinder whose volume is V = πr2h, where r is the radius and h is its height or length.)

Step 1: Convert lb to kg

150 lb = 68.0389 kg

Step 2: Calculate volume of copper

Volume = mass / density

Volume = 68038.9 grams / 8.94 g/cm³

Volume = 7610.6 cm³ Cu

Step 3: Calculate length of wire

The diameter of the wire is 9.50 mm, so the radius is half of that (4.75 mm), or 0.475 cm.

The total "volume" of the wire is πr²h = (π)*(0.475 cm)²(h) = 0.708h = 7610 cm^3

7610 = 0.708h

h = 10749 cm = length of wire

The length of the wire = 352.66 feet.

7 0
3 years ago
As two chlorine atoms combine to form a molecule, energy is
raketka [301]
B. released, forming bonds usually releases energy.
6 0
2 years ago
Read 2 more answers
What has mass?<br> A. Energy<br> B. Heat<br> C. Light<br> D. Matter
Mrrafil [7]

Answer:

matter

Explanation:

6 0
2 years ago
Read 2 more answers
Given the following partial (valence-level) electron configurations,<br> (a) identify each element,
Kamila [148]

The arrangement of electrons within an atom is called the electronic configuration and the electrons are filled up according to the energy of the levels as: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f.

<h3>What is the difference between electron configuration and valence electron configuration?</h3>

Electron configuration is the number of electrons that are present in the atom and is repressed through the different sub-shells. So for example, the electron configuration for oxygen is 1s^2 2s^2 2p^4. While the valence electrons only refer to the electrons in the outermost shell of the atom.

<h3>What is a partial orbital diagram?</h3>

A partial orbital diagram shows only the highest energy sublevels being filled. Al (Z = 13) 1s22s22p63s23p1. A condensed electron configuration has the element symbol of the previous noble gas in square brackets. Al has the condensed configuration [Ne]3s23p1.

Learn more about electronic configuration here:

<h3>brainly.com/question/26084288</h3><h3 /><h3>#SPJ4</h3>

4 0
2 years ago
This is the chemical formula for acetic acid (the chemical that gives the sharp taste to vinegar): An analytical chemist has det
murzikaleks [220]

Answer:

0.11 mol

Explanation:

<em>This is the chemical formula for acetic acid (the chemical that gives the sharp taste to vinegar): CH₃CO₂H. An analytical chemist has determined by measurements that there are 0.054 moles of oxygen in a sample of acetic acid. How many moles of hydrogen are in the sample?</em>

Step 1: Given data

  • Formula of acetic acid: CH₃CO₂H
  • Moles of oxygen in the sample of acetic acid: 0.054 moles

Step 2: Establish the appropriate molar ratio

According to the chemical formula of acetic acid, the molar ratio of H to O is 4:2.

Step 3: Calculate the moles of atoms of hydrogen

We will use the theoretical molar ratio for acetic acid.

0.054 mol O × (4 mol H/2 mol O) = 0.11 mol H

3 0
2 years ago
Other questions:
  • Recording station x has determined that the epicenter of a recent earthquake was 250 km away. no information is available yet fr
    13·2 answers
  • If 100. mL of 0.400 M Na2SO4 is added to 200. mL of 0.600 M NaCl, what is the concentration of Na+ ions in the final solution? A
    14·1 answer
  • What is the density of 35 ml of a liquid that has a mass of 28.7 g?
    12·2 answers
  • Consider the ammonolysis of benzoyl chloride by adding concentrated ammonium hydroxide to form the final product, benzamide. Rea
    9·1 answer
  • What is importance of thermometer?​
    5·1 answer
  • Determine the molar mass for the element Zn
    11·1 answer
  • Antacids, such as Alka-Seltzer, use the reaction of sodium bicarbonate with citric acid in water solution to produce a fizz as f
    13·1 answer
  • Non-living parts of an ecosystem (air, water, soil)
    6·1 answer
  • You're at the zoo and have a big red 1.80 L helium balloon. The barometric pressure today is 785 mmHg. Then you hear the roar of
    11·1 answer
  • Why do planets rotate around our sun
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!