Consider the balanced chemical equation for the combustion of methane (ch4).

mc026-1.jpg

given that the molar mass of co2 is 44.01 g/mol, how many liters of oxygen is required at stp to produce 88.0 g of co2 from this reaction?
44.8 l
45.00 l
89.55 l
89.6 l

Which statement describes how phase changes can be diagrammed as a substance is heated? the phase is on the y-axis and the temperature is on the x-axis. the temperature is on the y-axis and the phase is on the x-axis. the time is on the y-axis and the temperature is on the x-axis. the temperature is on the y-axis and the time is on the x-axis.

The answer for #3 is c but i don't know why

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion