Question

. a Avogadro's law states that equal volumes of gas at the same temperature and pressure contain equal numbers of molecules. true O false At STP, one mole of uranium hesxafltuoride (UP. MW 352 amu), the gas used in uranium enrichment programs, cupies a volume of I L true . false If two gas samples have the same temperature and volume then both contain the same number of molecules. true false D The value of Avogadro's number is 6.02x 1023 formula units per mooie. true false e Avogadro's number is valid for gases at STP true Ofalse Pre

Answer 1

a) True. Avogadro's law states that an equal volume of gas at constant temperature and pressure contains an equal number of molecules.

b) False, at STP, one mole of UF₆ occupies a volume of 22.41 L.

explanation:

STP = 1 atm of pressure and 273 K for temperature

P = 1 atm
V =?
n = 1 mole
R = 0.0821 atm L/mol K
K = 273 K

PV = nRT
solves to
V = nRT / P

V = [(1mol)(0.0821(atm L) / (mol K)(273K)] / (1atm)

V = 22.41 L

c) True, two given samples of an ideal gas, of the same volume and at the same temperature and pressure, contain the same number of molecules.

d) True, Avogadro's number is equal to 6.022 $\times$ 10²³ mol^-1

e) True, Avogadro's number valid for gases at STP.