A pure sample of unknown gas has a mass of 147g and a a volume of...
an unknown hydrocarbon gas sample has a volume of 500.0 mL and a mass of .3569 g at STP. What is the molecular weight of the gas in units of g/mol. use appropriate significant figures.
12. Compute the molar mass of an unknown pure ideal gas if 3.88 g sample of the gas exerts a pressure of 0.524 atm at 25.1 °C in a container of 4.75 L in volume.
3.A sample of a pure gas at 20 °C and 670 mm Hg occupies a volume of 562 cm3. How many moles of gas are in this sample? 4.An unknown compound contains only carbon and hydrogen. What is the volume (in L) of 1 mol of this gas at 100 °C and 760 mm Hg? 5.The same 1 mol sample of gas from the previous problem has a vapor density of 2.550 g/L. If the empirical formula of the compound...
+ 'A sample of gas with a mass of 1.020 g occupies a volume of 762 ml atu C and 1. aun (air). What is the molar mass of the gas? (20 pts) If the unknown gas is composed of 0.815 g of carbon and the rest is hydrogen, what is its molecular formula?
An unknown gaseous hydrocarbon consists of 85.63% carbon by mass. A 0.100-g sample of the gas occupies a volume of 0.0533 L at STP. What is the identity of the gas? A. C4H8 B. C3H6 C. C2H4 D. C5H10 E. CH2
22. (8 points) The “gas density” method is a classical method used to measure the molecular mass of a pure sample of an unknown gas. The flask has a known volume; P and I are measured, and n is calculated. The mass of the flask with the gas sample is measured and compared to the mass of the empty flask. A 0.1006 gram sample of a pure gas is collected in a flask that has a volume of 22.1 mL,...
19) If O.500 L of an unknown gas at STP has a mass of 1.70 g, what is its molar mass? Show detailed calculations
A 2.43 gram sample of an unknown gas is found to occupy a volume of 2.03 L at a pressure of 506 mm Hg and a temperature of 39°C. The molecular weight of the unknown gas is g/mol
A 4.62 gram sample of an unknown gas is found to occupy a volume of 1.50 L at a pressure of 989 mm Hg and a temperature of 30°C. The molecular weight of the unknown gas is g/mol.
A 2.51 gram sample of an unknown gas is found to occupy a volume of 2.24 L at a pressure of 632 mm Hg and a temperature of 49 °C. The molecular weight of the unknown gas is g/mol. The weight I got was 31.8 but it says it is wrong. What is the correct weight? Thank you!