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
kumpel [21]
3 years ago
15

In order to jave 2.2 moles of potassium oxide, how many grams of potassium are needed

Chemistry
1 answer:
DanielleElmas [232]3 years ago
8 0
Answer is: mass of potassium is 172.04 grams
Balanced chemical reaction: 4K + O2 = 2K2O.
n(K2O) = 2.2 mol.
From chemical reaction: n(K2O) : n(K) = 2 : 4 ( 1 : 2).
n(K) = 4.4 mol.
m(K) = n(K) • M(K).
n(K) = 4.4 mol • 39.1 g/mol.
n(K) = 172.04 g.
n - amount of substance.
m - mass of substance.
M - molar mass.
You might be interested in
What was the hiker's average velocity during part C of the hike?
umka2103 [35]

Answer:

0.13 km/min west

Explanation:

I just did the test.

6 0
2 years ago
6. How much energy is needed to freeze 88.0 g of silver?
Stella [2.4K]
7,040 energy to freeze the silver :)
8 0
2 years ago
Sometimes the color of an animal closely resembles the color of its environment. Which of the following is the most likely reaso
Deffense [45]

Answer:

The answer is D

Explanation:

Animals add color to their environment so a mate can see how creative the animal is.

6 0
3 years ago
Read 2 more answers
One of your chores is to mow the lawn. The lawnmower runs on gasoline. The gasoline
trasher [3.6K]

B

Explanation:

Burning is a chemical change and cutting grass is a physical change

7 0
3 years ago
Read 2 more answers
Gases and particles which are put into the air or emitted by various sources are called __________. photochemical smog emissions
Leto [7]
I would say the answer is emissions. These are the particles that are not supposed to be present in air but due to the production of different substances from humans daily activities these substances go with the air we breath. Hope this helped.
7 0
3 years ago
Other questions:
  • Science question down below
    14·1 answer
  • 7. A 1.50 x 103 kg car accelerates uniformly from rest to 10.0 m/s in 3.00 s.
    6·1 answer
  • the volume of a gas is 250mL at 340.0kPa pressure. what will the volume be when the pressure is reduced to 50.0kPa assuming the
    7·1 answer
  • Please answer number 76,77 and 78.
    15·1 answer
  • In the molecule SF4, sulfur makes four covalent bonds. Therefore, four of its six valence electrons need to be unpaired. The orb
    8·1 answer
  • How many moles are in 17.0 grams of H2O2?
    8·2 answers
  • Calculate the number of grams of aluminum chloride produced when 8.6 moles of aluminum react with chlorine gas.
    8·1 answer
  • 1. Mg + HCl  … + ….
    6·1 answer
  • If the reaction of 5.87 moles of potassium with excess hydrobromic acid was able to produce 2.49 mol H2, what is the percent yie
    15·1 answer
  • 6. How many grams are present in 13.2 moles of O₂?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!