James measured the humidity of the air on his backyard each morning for four days His data is recorded below On which day did it most likely rain

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?