NaHCO3+HCI--->NaCI+H2O+CO2 Percent yield:93.4% how would the percent yield be affected if some sodium hydrogen carbonate is left unreacted? explain

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

Ms. sullivan's class is designing a miniature roller coaster. after first setting it up, they find that it didn't have enough speed to go through the loop de loop. instead of taking out the loop, they decide to increase the height of the first hill the coaster goes down, and this adds the speed needed to make it through the loop. what would be a drawback to this plan in real life? a) no one likes loop de loops. b) there is no downside to this plan. c) a higher hill means a scarier ride. d) a higher hill takes more time and material to build.

What is the predicted change in the boiling point of water when 1.50 g of barium chloride is dissolved in 1.50 kg of water?