PLEASE HELP FAST!! WILL MARK BRAINLIEST When is the oxidation state of a metal included in the name of a compound?

A-When the metal can exist in more than one oxidation state.

B-When the charge on the nonmetal is not known.

C-When a prefix is used to indicate the number of metal atoms.

D-When the compound being named is a covalent compound.

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

What happens to isotopes that are unstable?

Consider this equilibrium: n29) + o2(g) + 2no(c).nitrogen gas and oxygen gas react when placed in a closed container. as the reaction proceeds towards equilibrium, what happens to the rate of thereverse reaction?