Acapacitor consists of two square plates, 6.2 cm on a side, separated by a 2.0 mm air gap. how much energy would be stored in the capacitor if a mica dielectric is placed between the plates? assume the mica is 2.0 mm thick (and therefore fills the space between the plates).the charges on the plates are equal and opposite and of magnitude 440 μc .

Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)

If 90.0 grams of ethane reacted with excess chlorine, how many grams of dicarbon hexachloride would form

Which of these is not an example of chemical weathering? a. iron-rich mineral rusting b. feldspar turning into clay c. limestone reacting with acid d. granite breaking up into sand