1. Why must you avoid using your hands in handling the magnesium ribbon and the
ID: 764303 • Letter: 1
Question
1. Why must you avoid using your hands in handling the magnesium ribbon and the crucible and cover? 2.Why must objects be cooled to room temperature before taking their weights(masses)? 3. At the high temperatures used in this experiment, some of the magnesium reacts with nitrogen gas in the air forming magnesium nitride, Mg3N2. Write the balanced equation for this reaction. 4. If 6.0 of MG is heated at high temperatures and is completely converted to magnesium nitride as in the equation above, how grams of magnesium nitride will be formed?Explanation / Answer
A).
You can contaminate/mess up the results if you use your bare hands (your hands contain salts and oils on them). Also, if you are heating up the Mg ribbon/crucible, you could burn yourself if you touched them with your bare hands.
B).
It's because on a precision balance, a hot object will generate air currents from convection. The air currents can affect the balance pan and cause it to misread.
C).
3Mg(s) + N2(g) --> Mg3N2(g)
D).
If 6g of Mg is used then 2g of magnesium nitride will be formed
because from above eqn one may easily see that 3 atoms of Mg form 1 atom of magnesium nitride
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.