Anerve signal is like a wave. how does this work?

an electrical wave moves down the axon by electrons moving from the place the signal started to the place it ends up.

a wave of reversal of the negative electrical potential inside the cell passes along the axon with ions moving in and out of the axon.

a wave of movement passes down the axon, in which the whole axon moves sideways in one place and then the next.

the density of the cytoplasm inside the axon changes from one place to the next as the signal moves along the axon.

calculate how many grams of ammonia can be produced from 4.21 grams of

n2 + 3h2 = 2nh3

my answer:

25.0g n2 x (1 mol/ 28.0gn2) x (2 mol nh3/ 1 mol n2) x (17.0g nh3/ 1 molnh3) = 30.36g n2

25.0g h2 x (1 mol h2/ 2.00g h2) x (2 mol nh3/ 3 mol h2) x (17.0g nh3/ 1 mol nh3) = 141.67g h2

lr = n2

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.