<span>In order to determine the mass of the piece of copper with only knowing it's density, it must have it's volume measured. In order to do this, the piece of copper could be placed in a container filled to the brim with a spout and a graduated cylinder below the spout. Then the piece of copper can be placed into the container without any fingers in the water. Then water will displace into the cylinder, the measured volume is the volume of the piece of copper, because of Archimede's principle, and we assume that the water is 1.0 g/mL or 1 g/cm^3. Then multiply the density with the volume to get the mass of the piece of copper.</span>
<span>342.15g/mol I'm not for sure though </span>
I think Magnesium not sure because the relative atomic mass of magnesium is 24,31.
Answer:
4
Explanation:
Given reaction is
2A + 3B -> 2C
From the above reaction for every 2 moles of A, 2 moles of C is formed and therefore for every mole of A reacted, 1 mole of C is formed
Now in this case we have 4 moles of A and excess amount of B
So in this case the limiting reagent is A and the excess reagent is B
As in this case A is the limiting reagent so for 4 moles of A reacted, 4 moles of C is formed
But formation of 4 moles of C is just expected because it is just the maximum amount of C formed as during the reaction there can be losses as well if the reaction is not done properly