2 AICI3 + 3 Ca - 3 CaCl2 + 2 Al You react aluminum chloride with calcium metal. You want to produce 40.00 grams of aluminum. How many grams of calcium do you need?

Which statement is best described as a atom

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

4. a 20-kg child is tossed up into the air by her parent. the child is 2 meters off the ground traveling 5 m/s. circle one: ke / gpe / both show your work for finding the values of each type of energy the object has: