An aqueous solution has a mass of 490 grams containing 8.5 × 10-3 gram of calcium ions. the concentration of calcium ions in this solution is

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

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 ?

‘which reaction would most likely require the use of an inert electrode?