Asap will givebr /> which of the following describes a compound? (hint: carbon and oxygen both appear in the periodic table)
a. a piece of pure carbon, containing only carbon atoms
b. oxygen gas surrounding a solid piece of carbon
c. a substance made of two oxygen atoms for each carbon atom
d. carbon and oxygen atoms mixed without being bonded together

There is a single path for electrons. the current decreases when additional resistors are added. the current will be the same in each resistor. these statements best describe a(n) circuit.

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

Apump contains 0.5 l of air at 203 kpa.you draw back on the piston of the pump, expanding the volume until the pressure reads 50.8 kpa. what is the new volume of the air pump