How many moles of Br2 are used when 14.00 moles of KBr are produced?
(show work)

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest

Use the de broglie's wave equation to find the wavelength of an electron moving at 4.5 × 106 m/s. show your work. note: h= plank's constant (6.62607 x 10-34 j s)

Ablock of aluminum is dropped into a graduated cylinder with an initial volume of water at 75ml and the volumes rises to 90ml. if the block has a mass of 40.5 g what is its density ?