17 grams of ammonia is completely reacted with 45 grams of oxygen to produce NO and H2O (a) Calculate the number of moles of unreacted reactant leftover.

If this equation was completed which statement would it best support

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure