3. Two students are arguing about their skill in determining the volume of a cube of iron (which has an accepted density value of 7.87 g/cm'). One student believes he will be able to take a better volume
using the formula = lxwx h. His volume is 4,59 cm'. The other student believes she can find a better
volume using water displacement. Her volume is 4.73 cm”. The mass of the iron cube is 37.0 g. Find the
percent error for each and determine which student had the best measurement,
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step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.

answer; both surfaces of the membrane are nonpermeable