What is the final temperature of a 100. gram sample of water at 90.0°C if it gives off 3.00x10 Joules of heat as it cools? The C of water is 1.00cal/g°C.

Given that 1 mi = 1760 yd, determine what conver- sion factor is appropriate to convert 1849 yd to miles; to convert 2.781 mi to yards.

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.

What is one real world example of a colligative property?