Calculate the moles of Fe2 (aq) present when 54.8 mL of 2.00 M Fe2 (aq) are diluted to a total volume of 100.00 mL.

Water (2510 g ) is heated until it just begins to boil. if the water absorbs 5.09×105 j of heat in the process, what was the initial temperature of the water?

Which fact represents evidence for the big bang theory?

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?