In this activity, you’ll use a simulation to learn about chemical reactions between atoms and molecules. Get started by following these steps: Go to the simulation Balancing Chemical Equations.
Click the simulation and select the introduction. Balance the three equations using the balance scale and graph tools.
When you’ve finished all three equations, go to the game and select level 2. Complete all five challenges.
Now use what you learned from the simulation to answer the following questions.

Part A
Based on your experience in the simulation, what do the numbers 3 and 4 refer to in 3NH4?

osteogenesis imperfecta (oi) refers to a congenital ailment of bones. in the condition, the bones become brittle or fragile. this ailment is a general result of the defect or mutations in the genes (colia1 or colia2). this mutation results in imperfect collagen formation either in quantity or quality wise.  

there are eight kinds of oi defects, and each kind varies with certain distinctions in symptoms. the usual symptoms include frequent bone fractures, loss of hearing in infants, protruding eyes, discoloration of the white in the eyes, respiratory issues, loosening of the joints, short stature, and other symptoms.  

answer; an inhibitory postsynaptic potential;