Asalt when dissolved in water dissociates into a cation (a+) and an anion ( if both the ions consist of the same number of electrons and the molecular weight of the salt (ab) is 74.5, identify the position of a and b in the modern periodic table.

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 ?

Heat is the total potential energy of a substance that can be transferred. true false

What is the chemical formula for dihydrogen monoxide