Oxides of nitrogen are pollutant gases which are emitted from car exhausts.

in urban traffic, when a car travels one kilometre, it releases 0.23 g of an oxide of nitrogen nxoy, which occupies 120 cm3.

what are the values of x and y?
(assume 1 mol of gas molecules occupies 24.0 dm3.)

a x = 1, y = 1

b x = 1, y = 2

c x = 2, y = 1

d x = 2, y = 4

Here’s one way to follow the scientific method. place the missing steps in the correct position in the process

Sulfur dioxide and oxygen react to form sulfur trioxide during one of the key steps in sulfuric acid synthesis. an industrial chemist studying this reaction fills a 25.0l tank with 4.5 mol of sulfur dioxide gas and 4.5 mol of oxygen gas at 30.°c. he then raises the temperature, and when the mixture has come to equilibrium measures the amount of sulfur trioxide gas to be 1.4 mol. calculate the concentration equilibrium constant for the reaction of sulfur dioxide and oxygen at the final temperature of the mixture. round your answer to 2 significant digits.

What is the main reason why some developing countries fear the increase the free trade policies around the world?