A chemistry student wants to obtain 18 mL of a 53% salt solution. He currently has a 50% salt solution and a 60% salt solution on hand. How much of each
solution will need to be mixed together to yield 18 mL of a 53% salt solution?

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?