posted by Niki .
When 34.5 L ammonia and 39.5 L oxygen gas at STP burn, nitrogen monoxide and water are produced. After the products return to STP, how many grams of nitrogen monoxide are present?
Lets check to see if there is a limiting reageant.
Four volumes of ammonia, five volumes of O2
5/4 *34.5=43 L O2, so there is not enough oxygen.
4/5*39.5=31.6 L of ammonia are reacted.
Liters of NO produced: 31.6L NO
You figure the grams.