Match the action to the effect on the equilibrium position for the reaction N2(g) + 3H2(g) ⇌ 2NH3(g). (3 points) b 1. Adding hydrogen gas 2. Adding a catalyst 3. Decreasing the pressure a. Shift to the left b. Shift to the right c. No effect

1. b

2. c

3. a

Explanation: A chemical reaction in equilibrium is actually in a dynamic euqilibrium, which means that changing a condition will make the equilibrium move to counteract the action and reestate the equilibrium.

For example, in the reaction:

N2(g) + 3H2(g) ⇄ 2NH3(g)

1. Adding H2: if you add the reagent, to reestate the equilibrium, the reaction will produce more products so, it will move to the right;

2. A catalyst doesn't interfere in the equilibrium, because it moves to the right and to the left at the same extent. Therefore, there is no effect.

3. Decrease the pressure: when you decrease the pressure of a reaction, the equilibrium will make the pressure increase again by moving towards the side of the reaction which has more molecules, so, it shifts to the left;

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

10 years is the answer