If 14.7 g of calcium is placed in 11.5 g of water,
what mass of hydrogen gas is produced?

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?

How many moles of oxygen gas are produced from the decomposition of six moles of potassium chlorate