0.2327 g N2 ? 0.1163 g N2 ?
4.30 g N2 ? 0.2325 g N2 ?
or 0.233 g N2 ?
2006-12-01 23:34:51 · 3 answers · asked by ? 3 in Science & Mathematics ➔ Chemistry
at standard condition
the moles of N2 0.186/ 22.4 = 8.3 * 10 ^-3
the grams of N2 8.3 * 10^ -3 * 28 = 0.2325g
2006-12-02 01:08:53 · answer #1 · answered by James Chan 4 · 0⤊ 0⤋
The formula for nitrogen gas is N2
Its relative molecular mass Mr = 2 * 14 = 28
This means 28 g of nitrogen is 1 mole.
1 mole of any gas at room temperature and pressure (r.t.p) occupies a volume of 24 dm^3 or 24 000 cm^3 = 24 000 mL
Hence 24 000 mL of nitrogen gas has a mass of 28 g
1 mL of nitrogen gas has a mass of [1/24000] * 28 g
Therefore 186 mL of nitrogen has a mass of 186 * [1/24000] * 28 g
You can now work out the answer.
As I mentioned to you in your other question - always use the proportion approach instead of using formuli recall
2006-12-02 10:31:09 · answer #2 · answered by pete 2 · 0⤊ 0⤋
what is the consenration??
if u have the cons. u can use this eq. : C= mol/ Volum to find the mol , and then mol= mass / mass of N2 (g/mol) to find the mass..
hope u get what i mean :)
2006-12-02 07:51:23 · answer #3 · answered by Anonymous · 0⤊ 0⤋