Look at the four chemical reactions.
Reaction 1: 4Na + O2 + 2Na2O
Reaction 2: 2Naci - 2Na + Cl2
Reaction 3: CaCO3 CaO + CO2
Reaction 4:2KCIO33 2KCI + 302
Which statement identifies the reaction that is different from the rest and explains correctly why it is different?
O Reaction 2, because two ions are interchanged
O Reaction 2, because two products are formed
O Reaction 1, because a single product is formed
O Reaction 1, because a single ion is replaced in a compound

The gulf stream is a warm water current that flows away from the equator to northern europe. witch of these does it cause. a. crashes of warm and cool water in the ocean b. colder climates near the equator c. large waves on the cost of europe d. warm climates in northern europe

The small bags of silica gel you often see in a new shoe box are placed there to control humidity. despite its name, silica gel is a solid. it is a chemically inert, highly porous, amorphous form of sio2. because water vapor readily adsorbs onto the surface of silica gel, it acts as a desiccant. despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided you should be able to make an educated guess about the thermodynamic characteristics of the process. predict the signs for δg, δh, and δs for the adsorption of water.

What would happen to a volleyball left outside in the winter? o o o o a. it would expand. b. it would lose air. c. it would shrink. d. it would explode.