What volume in mL will 6.5 g of CO2 occupy at STP?
I know pressure is 760 mmHg at STP and temp is 0 degrees C (273 K) at STP, but I'm not sure what formula to use...
2006-11-15 07:46:35 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
the molecular weight of CO2 = 12 +2*16 = 44
so 6.5 g yields a numer of moles n = 6.5/44 =0.148 moles
the volume V is calculated with formula pV = nRT
V = nRT/P = 0.148*8.31* 273 /760*133 =0.0033m^3 = 3.3 Liters
2006-11-15 07:58:51 · answer #1 · answered by maussy 7 · 0⤊ 0⤋
As far as I know, if you don't have any initial and final measurements, you couln't find the volume using STP. What you probably need to do is use the density of CO2 gas in g/ml or in g/cm^3. You would take the mass given to you, and divide it by the mass in the density to get the volume.
2006-11-15 08:07:38 · answer #2 · answered by lordblair2002 1 · 0⤊ 0⤋