list four quantum no. that defines energy state of the electron in hydrogen along with their possible values and explain their significance in terms of orbitals?

Miner's coal distributors does not mine coal itself, nor does it even store or handle the coal. instead, miner's solicits orders for low sulfur coal from other firms, then purchases the required amount from suppliers and directs them to ship the coal to its customers. what is miner's

The molality of calcium chloride (cacl2) in an aqueous solution is 2.46 m. what is mole fraction of the solute?

One student said that the investigation was not valid (a fair test). write a plan for the investigation that includes improvements to the method and apparatus