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

r just means there's a number of carbon in teh chain. for example rcooh means that after x number of carbon, the chain ends with cooh.

explanation:

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.