A balloon containing 2.6 mol hydrogen has a volume of 3.9 L. More hydrogen is added to the balloon, giving it a volume of 17.1 L. How many moles of hydrogen were added?

Which of the following is true for the actual yield of a reaction? it is always calculated as a ratio. it is the yield from the excess reactant. it is the yield from the limiting reactant. it is always less than the theoretical yield.

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:

What is the formula of the ionic compound composed of calcium cations and chloride anions