Compare them accordingly with the formula of E=hc/wavelength
Answer:
0.000170 mol
Explanation:
This problem can be solved using dimensional analysis:
3.25g CuS × × = 0.000170 mol
Answer:
It isn't.
Explanation:
It is a counting unit for "things" — atoms, molecules, ions, etc. — and these things all have different masses.
For example, a chemist may know that one atom of Cu reacts with one atom of S to form one molecule of CuS.
Cu + S ⟶ CuS
She knows that 1 mol of Cu (6.022 × 10²³ atoms of Cu) has a mass of 63.55 g and 1 mol of S (6.022 × 10²³ atoms of S) has a mass of 32.06 g.
By measuring out 63.55 g of Cu and 32.06 g of S, she knows that there are just enough atoms of each element to react with each other.
Thus, the mole has enabled her to count atoms.
1) number of moles of N2 = n/2
2) Number of moles of CH4 = n/2
3) Total number of moles of the mixture = n/2 + n/2 = n
4) Kg of N2
mass in grams = number of moles * molar mass
molar mass of N2 = 2 * 14.0 g/mol = 28 g/mol
=> mass of N2 in grams = (n/2) * 28 = 14n
mass of N2 in Kg = mass of N2 in grams * [1 kg / 1000g] = 14n/1000 kg = 0.014n kg
Answer: mass of N2 in kg = 0.014n kg