Identify the name and charge of the cation and anion in the compound copper (II) chromate, CuCrO4. If something has a positive charge, what will happen to it if placed near:
another positive charge?
a negative charge?
something neutral?
Why do these things happen?

What happens when the temperature of a solution increases?

What type of electromagnetic radiation has a shorter wavelength than blue light

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