Reactions (16 pts) consider two beakers. in beaker #1, 123.0 g of barium nitrate is dissolved in 500 ml of water. in beaker #2, 123.0 g of potassium sulfate is dissolved in 500 ml of water. the two solutions are poured into a common vessel, and 109.8 grams of solid barium sulfate form. the remaining material stays dissolved in the water.
a) write and balance chemical equation for this process. be sure to include subscripts that indicate the state of matter. (4 pts)
b) what was the molar concentration of barium nitrate in beaker #1? (4 pts)
c) which is the limiting reagent for this reaction? show how you determined this. (4 pts)
d) what is the molar concentration of the excess reagent in the reaction vessel after the reaction? (6 pts)
water pipes burst because the water inside them expands is it gets close to freezing, and this causes an increase in pressure inside the pipe. when the pressure gets too high for the pipe to contain, it ruptures.
there are many different forms of energy present in a classroom.
kinetic energy (energy of motion) may be seen in students walking around the classroom.
light/radiant energy may be seen from the lights on the ceiling.
potential energy (stored energy) may be seen in books on high shelves.
a. atoms gain, lose, or share electrons to achieve a full valence shell.