When she dropped a rock into a graduated cylinder of water, veronica noticed it sank to the bottom. she decided to investigate what it would do if she tossed it into a much larger amount of water. when she tossed it into a lake, the rock sank again. a) the density of a substance is the same regardless of the amount. b) the lake had become less dense because of heavy rains in the past month. c) the rock was already wet from being submerged in the graduated cylinder of water. d) an object's density changes based on the amount of substance in which it is submerged.

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

Consider the reaction of a(g) + b(g) + c(g) => d(g) for which the following data were obtained: experiment initial [a], mol/l initial [b], mol/l initial [c], mol/l initial rate, mol/l. s 1 0.0500 0.0500 0.0100 6.25 x 10^-3 2 0.100 0.0500 0.0100 2.50 x 10^-2 3 0.100 0.100 0.0100 1.00 x 10^-1 4 0.0500 0.0500 0.0200 6.25 x 10^-3 what is the rate law for the reaction?

Which of the following is most likely true about water in chemical solutions?