Calculate the Percent by Mass of Potassium Nitrate in a Solution

question 18

Multiple Choice

Calculate the percent by mass of potassium nitrate in a solution made from 45.0 g KNO₃ and 295 mL of water at 25ºC. At this temperature, the density of water is 0.997 g/mL.

• A) 1.51%
• B) 7.57%
• C) 13.3%
• D) 15.2%
• E) 86.7%

---

Definitions:

Online Community

A group of individuals who interact with each other via the internet, sharing interests, goals, or purposes, and often forming a social network.

Lurkers

Individuals or users who observe or read content on online platforms without actively engaging, contributing, or making their presence known.

Exchanges

The act of giving one thing and receiving another in return, which can occur in various contexts such as markets, social interactions, or information sharing.

Resources

Materials or assets available to individuals or organizations to help achieve goals, including financial, human, educational, and technological resources.