Answer:
Air can be described as: Mass and Mixture of Gases
Mass is defined as how much stuff an object contains - and by stuff, I mean matter, like atoms and molecules. And even though you can't see it, air has a lot of atoms and molecules. Air is a gas (as opposed to a liquid or a solid) and contains about 78% nitrogen, 21% oxygen, and 1% argon.
Explanation:
Answer:
V = m
d = 14 830 g × 1
c
m
³
19.32
g = 767.6 cm³
The answer is 0.2 M.
Molarity is a measure of the concentration of solute in a solution
c = n ÷V<span>
c - concentration of solute,
n - number of moles of solute
V - volume of solution
</span>
We know:
V = 50.00 mL = 0.05 L
c = ?
n = ?
Let's calculate concentration:
c = m/(V * Mr)
The molar mass of <span>(NH4)2SO4 is the sum of atomic masses (Ar) of its elements):
Mr (</span><span>(NH4)2SO4) = 2Ar(N) + 8 Ar(H) + Ar(S) + 4Ar(O)
= 2 * 14 + 8 * 1 + 32 + 4 * 16 =
= 28 + 8 + 32 + 64 =
= 132 g/mol
c = 26.42 g/ (0.05 L * 132g /mol) =26.42 g/ 6.6 L*g/mol = 4 mol/L = 4 M
Now, calculate molarity:
</span>c = n ÷V
n = c * V
n = 4 mol/L * 0.05 L
n = 0.2 mol
