Which reaction would produce a solution that conducts electricity extremely well?
hapo(a) h(aq) toypo; (aq)
ch, ch, cooh(aq) + h2o(0) h30'(aq) + ch ch. coo" (aq)
ch, ch, oh , ch, ch, oh(aq)
ca(no3)(8), ca (aq) + 2no3 (aq)

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?

How many moles are in 43.9 l of oxygen

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.