If excess (NH4)2SO4 reacts with 20.0 moles of Ca(OH)2, how many moles of NH3 are produced? Given: (NH4)2SO4+ Ca(OH)2= CaSO4+ NH3+ H2O

How air particles exert a pressure on the inside of the balloon

Which of the following statements is true about energy quantization at the atomic level? electrons in the outermost orbits are the most stable. electrons in all the orbits around the nucleus have the same amount of energy. electrons in the orbit closest to the nucleus have the least amount of energy. electrons absorb or release the same amount of energy independent of the energy levels.

What sources of error may have contributed to the percent yield not being 100 percent? think about things that may have led to inaccurate measurements or where mass of the product could have been lost if this experiment was conducted in a physical laboratory.