Calculate the equilibrium concentration of [N2][N2] if the initial concentrations are 2.25 MM N2N2 and 0.55 MM O2O2. (This N2/O2N2/O2 concentration ratio is the ratio found in air.)

The equilibrium concentration of N2 is 2.22765 M

Explanation:

The air pollutant NO is produced in automobile engines from the high-temperature reaction:

N2(g)+O2(g) <--> 2NO(g)  Kc=1.7 * 10^-3

Part A: Calculate the equilibrium concentration of N2 if the initial concentrations are 2.25 M N2 and 0.55 M O2. (This N2/O2 concentration ratio is the ratio found in air.)

Step 1: Data given

Initial concentration of N2 = 2.25 M

Initial concentration of O2 = 0.55M

Kc = 1.7 * 10^-3

Step 2: The initial concentrations

[N2] = 2.25 M

[O2] = 0.55 M

[NO] = 0M

Step 3: The concentrations at equilibrium

[N2] = 2.25 - x M

[O2] = 0.55 - x M

[NO] = 2x M

Step 4: Kc

Kc = 1.7 *10^-3 = (2x)² / (2.25 -x)(0.55 -x )

1.7 * 10^-3 = 4x² / (1.2375 - 2.80x  +x² )

0.0017x² - 0.00476x + 0.002104 = 4x²

3.9983x² + 0.00476x - 0.002104 = 0

x = 0.02235

[N2] = 2.25 - x M = 2.25 - 0.02235 = 2.22765 M

[O2] = 0.55 - x M = 0.55 - 0.02235 = 0.52765 M

[NO] = 2x M = 2* 0.02235 = 0.0447 M

The equilibrium concentration of N2 is 2.22765 M

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.