How many CAL must be added to heat 399.9 g of water from -20…
How many CAL must be added to heat 399.9 g of water from -20.0oC to 95.0 oC ? Don’t do the calculation, just indicate which conversion factors would be used __1__ specific heat of the solid, 0.504 cal/goC __2__ specific heat of the liquid, 0.999 cal/goC __3__ specific heat of the gas, 0.497 cal/goC __4__ heat of fusion, 79.7 cal/g __5__ heat of vaporization, 539 cal/g A. used B. not used _______ _______ _______ _______ _______
Read DetailsHow many moles of helium is in a 250. L balloon at STP ? Cho…
How many moles of helium is in a 250. L balloon at STP ? Choose only from the section first: This is a __1__ problem A. missing variable B. change in conditions C. 1 mol D. density = molar mass/22.414 L E. partial P second: we need to solve for __2__ using the equation __3__ F. P G. P1 H. P2 I. V J. V1 (not V) K. V2 (not V) L. n M. n1 (not n) N. n2 (not n) O. T P. T1 (not T) Q. T2 (not T) R. R = 8.205 x 10-2 L atm/K mol S. 1 atm = 760 torr T. Ptotal = P1 + P2 + ……. U. PV = nRT V. P1V1 P2V2 –––––– = –––––– n1T1 n2T2 finally: The answer is __4__ w. 11.2 mol x. 62.5 mol y. 5600 mol z. 68300 mol _______ _______ _______ _______
Read DetailsAnswer the following about drawing the attractive force betw…
Answer the following about drawing the attractive force between a water molecule (H2O) and a molecule of phosphorus trichloride (PCl3). The H in the O-H bond in the water molecule has __1__ and the P in the P-Cl bond in the PCl3 molecule has __2__ . A. no charge B. a partial + charge C. a partial – charge _______ _______
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