Answer:
A. a magnet
Explanation:
Iron fillings could be separated from sand using a magnet
You'll need Avogadro's number for this. NH3 has 1 Nitrogen and 2 Hydrogen. You'll multiply the molar mass of each times Avogadro's number. So:
molar mass N x 6.022x10^23 x 1 Nitrogen= total A
Molar mass H x 6.022x10^23 x 2 Hydrogen= total B
Add total A+B = your answer
I don't have a calculator or periodic table but if you plug in the numbers you'll get your answer. Hope it helps.
C. that is the answer to the question
Answer:
The periodic table is a table representing all the elements found in nature.
Following are the limitations of the modern periodic table:
- Hydrogen does not have a fixed position in this table. It matches the properties of group 1 and group 17.
- There are no separate positions for different isotopes of an element in the periodic table.
- The lanthanides and actinides series are not present in the main body of this table.
