A student who was in a hurry to complete his experiment did not follow the exact directions for some of the procedural steps. Briefly explain what effect, if any, the following changes would have on the whole number ratio of Mg and O in the compound the student produced.(1) When arriving at the laboratory station, the student found a dirty crucible and cover. In the interest of time, the student skipped steps 2-8, weighed the cruible and cover, and proceeded directly to Step 9

(2) While heating the Mg in the crucible, the cover fell onto the laboratory bench and broke. The student found a new cover and used it for the remainder of the experiment

(3) After adding water to convert and Mg3N2 to magnesium oxide, the student completely covered the crucible while doing the final heating.

(4) Because the cruicble seemed to be taking forever to cool, the student decided to make the final weighing when the crucible was still slighty warm