Learn how to solve problems like this one with our expert tutor.

Problem: When KClO3(s) (molar mass = 122.55 g mol–1 ) is heated at high temperature, it decomposes to give KCl(aq) (molar mass = 74.55 g mol–1 ) and O2(g) (molar mass = 32.00 g mol–1 ) as products. If 4.289 g of KClO3 are heated, how many liters of oxygen gas (measured at 22.4 oC and 754.0 torr) are produced?A. 1.283 L B. 0.9626 L C. 0.8555 L D. 1.668 L E. 1.925 L

FREE Expert Solution

Write the balanced equation and determine the moles of Oproduced from 4.289 g KClO3 using gas stoichiometry. Lastly, use ideal gas equation to determine the volume of O2 from the # of moles O2 produced

The initial and unbalanced equation of decomposition of KClO3 will appear as:

KClO3 → O2 + KCl

View Complete Written Solution
Problem Details

When KClO3(s) (molar mass = 122.55 g mol–1 ) is heated at high temperature, it decomposes to give KCl(aq) (molar mass = 74.55 g mol–1 ) and O2(g) (molar mass = 32.00 g mol–1 ) as products. If 4.289 g of KClO3 are heated, how many liters of oxygen gas (measured at 22.4 oC and 754.0 torr) are produced?

A. 1.283 L 

B. 0.9626 L 

C. 0.8555 L 

D. 1.668 L 

E. 1.925 L

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Gas Stoichiometry concept. If you need more Gas Stoichiometry practice, you can also practice Gas Stoichiometry practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofWhen KClO3(s) (molar mass = 122.55 g mol–1 ) is heated at hi...as medium difficulty.