What mass of NO2 can be produced when 678 mL of oxygen at STP and 256 grams of NH3 are mixed together?

When the mercury level in a barometer decreases that atmospheric pressure has

When microscope slides are stained to show blood cells, the small red blood cells that appear on the slides are much numerous than the large white blood cells. this supports the concept that

Spaghetti sauce can be high in sodium. what is a good guideline for mg of sodium per half cup serving? a. less than 1 mg b. less than 800 mg c. less than 700 mg d. less than 400 mg