A 28.98 g piece of gold is put in a 10-mL graduated cylinder, and the water rises 1.50mL. a. What is the density of gold?
b. You know the density of silver is 10.5 g/mL. What mass of silver would cause the water to rise 1.50mL?

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.

Once similarity and one difference between a mixture of elements and a mixture of compounds

Who determined the nature of chemical bonds?