How much copper sulfate to electroplate 3 gms of copper

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !

Fossil fuels are organic compounds that are made from

For the reaction c6h14(g) & longrightarrow; c6h6(g) + 4h2(g), δp(h2)/δt was found to be 2.5 x 10-2 atm/s, where δp(h2) is the change in pressure of hydrogen. determine δp(c6h14)/δt for this reaction at the same time.