Everything that takes up space and has a mass is matter.
Basically almost everything around you is matter. Even air, yes, gas is a form of matter. Even you think it has no weight, but there's still very little molecules and atoms around that takes up space and weight.
The only examples that is not a matter are for example some ideas, such as friendship, time, memories etc.
1 mol = 6.022 x 10²³ atoms
In order to find how many atoms, dimly multiply the amount of moles you have by 6.022 x 10²³ or Avogadro's number.
So you have 1.75 mol CHC1₃ x (6.022x10²³) = 1.05385 x 10²⁴ atoms of CHCl₃
But now you have to round because of the rules of significant figures so you get 1.05 x 10²⁴ atoms of CHCl₃
The first step of the scientific method would be Observations.
Answer:
I'm not 100% sure but I think it would be constant
Each mole of N₂ generates 2 moles of Li₃N. Thus,
0.08 moles of Li₃N will require:
0.08 / 2
= 0.04 moles of N₂
The second option is correct.