Don't ever return unused chemicals to their original containers. If you do, you could be
contaminating the chemical. Discard the leftover chemical in the correct waste
box. Ask your teacher if your not sure about what to do.
Answer:
3.08x10^25
Explanation:
Divide the mass in grams by the molar mass of nitrogen (14.0067), then multiply the result by Avogadro's number (6.022x10^23). Then round to the correct amount of significant figures.
Q=M×C×T
..that's the equation
Explanation:
from definition of density we have
density=mass/volume
and density=55 mass=220g
volume=220/55
volume=4ml
or 4×10^-3l