A pharmacist working in pediatrics received several orders for a 5% sodium chloride inhalation from a physician who is new to the hospital. The pharmacy does not stock this strength. The pharmacist has to 250 ml bags of 1/2 normal saline and 20 ml vials of 14.6% sodium chloride. How many milliliters of the 14.6% sodium chloride must be mixed with the contents of 1 bag of 1/2 normal saline to prepare the 5% sodium chloride that was ordered?

Iknow #2 is d. i just need to know why

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

Two nitro no2 groups are chemically bonded to a patch of surface. they can't move to another location on the surface, but they can rotate (see sketch at right). it turns out that the amount of rotational kinetic energy each no2 group can have is required to be a multiple of ε, where =ε×1.010−24 j. in other words, each no2 group could have ε of rotational kinetic energy, or 2ε, or 3ε, and so forth — but it cannot have just any old amount of rotational kinetic energy. suppose the total rotational kinetic energy in this system is initially known to be 32ε. then, some heat is removed from the system, and the total rotational kinetic energy falls to 18ε. calculate the change in entropy. round your answer to 3 significant digits, and be sure it has the correct unit symbol.