Answer: 2 Moles
Explanation: Moles = Mass of chemical in grams (in this case 36.0g) ➗ Relative Atomic Mass of chemical (H2O = 18)
36 ➗ 18 = 2
Answer:
Mass is the amount of matter in the object, and is not affected by gravity. Weight, on the other hand, is directly related to gravity and how much you pull to the ground.
Answer is: empirical formula is H₄N₂O₂.
m(unknown compound) = 8,5 g.
m(N₂) = 2,37 g.m(H₂O) = 3,04 g.
n(N₂) = m(N₂) ÷ M(N₂).
n(N₂) = 2,37 g ÷ 28 g/mol.
n(N₂) = 0,0846 mol.
n(H₂O) = m(H₂O) ÷ M(H₂O).
n(H₂O) = 3,04 g ÷ 18 g/mol.
n(H₂O) = 0,168 mol.
n(H₂O) : n(N₂) = 0,168 mol : 0,0846 mol.
n(H₂O) : n(N₂) = 2 : 1.
Compound has four hydrogen, two oxygen and two oxygen.
Density = mass
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volume
= 71.68
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8
= 8.96 g/cm3.
Hope this helps!
It's essentially another word for concentration, of the acid. e.g. "the molarity of the acid is 3moldm^-3"
