Answer:
One of the errors for low percentage of magnesium could be because not all the magnesium may have reacted.
Explanation:
During the heating process, if the magnesium have not reacted completely, it can lead to low percentage of magnesium in the oxide formed. The product may still look a bit greyish rather than whitish after the heating process.
A rock is definitely more dense. If you were to put a cloud in water it would float/stay above it and a rock would sink to the bottom
Atomic mass is the answer!!
Explanation: An elements atomic number won’t be able to change
I believe the answer is A, if they have a stronger connection lower the vapor pressure so higher the boiling point
