Smarth

a sheet of metal is 97.4 mm wide and 59.4 mm long. if it weighs 9.788g and the density of the metal is 7.23g/cm^3, what is the thickness of the sheet(in mm) ?

a piece of nickel wire has a diameter of 0.568. if the nickel has a density of 8.90g/cc, how long( in meters) should you cut a piece of wire to obtain 0.0234 moles of nickel?

An unknown element reacts with bromine to give bromide, MBr3. If 2.809g of the unknown element gives 27.765grams of MBr3, what is the element? ( give the symbol ) I don't understand the M in the MBr3...can someoen please help me with this question ASAP th...

i combined agno3 with 25ml of tap water, and it turned faint blue which ion is present in trace amounts in tap water but not in distillied water? explain. what is the source of the ion in the tap water?

density = mass over volume d=m/v sub in the values and solve for the density

"well, in the compound, it has 27.765grams, of which the metal is (27.765-2.809) grams, and the Br is 2.809 grams. " i don't understand this as you said br is 2.809 but the question says the unknown element is 2.809 grams?