determine the molecular weight of a compound that generates the following data:?

0 ⤊

determine the molecular weight of a compound that generates the following data:?

pressure:750mm HG
Volumen:275ml
weight of sample 0.920g
temperature: 100c
(use the general gas law formula and constant.)

2007-04-23 18:36:04 · 3 answers · asked by randy_nephro 1 in Science & Mathematics ➔ Chemistry

3 answers

pv=nRT n=m/M
750*275=.92/M*R*373

2007-04-23 18:43:09 · answer #1 · answered by sana 2 · 0⤊ 0⤋

100 deg C = 373 K
R = 0.082057 LÂ·atmÂ·molâ1Â·Kâ1
275 mL = 0.275 L
P = 750 mmHg / 760 mmHg = 0.987 atm

1 atm = 760 mmHg

PV = nRT
(0.987 atm)(0.275 L) = n(0.082057 LÂ·atmÂ·molâ1Â·Kâ1)(373K)
n = 0.00886 mol

molecular weight = g/mol
MW = .920g/(.00886 mol)
MW = 103.81 g/mol

2007-04-24 01:51:26 · answer #2 · answered by mwebbshs 3 · 0⤊ 0⤋

(0.92 g/0.275 L)(750/760)(293/373)(22.4 L/mol) = 58.091 g/mol

2007-04-24 01:48:49 · answer #3 · answered by Helmut 7 · 0⤊ 0⤋