INK using the correct number of significant figures and correct units. RECORD AL

Question

INK using the correct number of significant figures and correct units. RECORD ALL DATA IN 0.0742 0,01 1. Mass of magnesium sample 2. Volume of hydrogen 0.0m 3. Temperature of hydrogen 4. Temperature of water 5. Barometric pressure mm 6. Difference in water levels 17, 3.Mnl m M 7. Aqueous vapor pressure I. 27 mmH 1.32 mm tt CALCULATIONS: SHow coMPLETE "SET-ups" (and the rounding off FOR ALL CALCULATIONS on the back of this age or on a separate sheet. Report results to the correct number of significant figures and correct units. Absolute temperature of the gas 304.3 L Mercury equivalent of the difference of water levels Partial pressure of dry hydrogen 72.3 S,S Volume of dry hydrogen at STP to lo 0 .(o Moles of hydrogen 2.9 b x 10 Molar volume at STP Average molar volume at STP Average deviation Dev. Of average STP molar V from ideal STP molar V

Explanation / Answer

Molar volume at STP, by definition is

22.4 mol per liter

so

V = 1L /22.4 L = 0.04464 L/mol, this is a CONSTANT value for any gas

The molar volume from your experiment will be:

Vmolar = V/mol = (81.8*10^-3)/(3.05*10^-3) = 26.8196 L per mol

Clearly, it is pretty far from our constant value

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