What is the percent by mass of potassium nitrate in a solution made - ProProfs Discuss
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What is the percent by mass of potassium nitrate in a solution made from 45.0g KNO3 and 295 mL of water? Density of water is 0.997 g/mL.



A. 15.2%
B. 1.51%
C. 7.57%
D. 13.3%

This question is part of Cherryls chem test #2
Asked by Coulter, Last updated: May 30, 2019

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2 Answers

C. Matz

Traveler and writer by profession.

C. MatzCollege student, Graduation, Orlando
College student, Graduation, Orlando

Answered on May 01, 2019

The correct answer is option D
First, let’s calculate the mass of water
Mass of water = 295ml 0.997g/ml
= 294 g
To calculate % by mass of potassium nitrate in the solution
% by mass = (45 100) / (45 + 294)
= 13.3%
Hope you find this helpful

 Reply

John Smith

John Smith

Answered on Jan 25, 2017

13.3%
 Reply

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