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A student determined the molar mass of an unknown non-electrolyte compound by measuring the freezing point depression of an aqueous solution of the compound.
Mass of empty test tube: 35.223
Mass of test tube and compound: 36.837
Mass of test tube compound and water: 56.984
Freezing point of distilled water: 0.05 °C
Freezing point of solution: -1.61 °C
The molality of the solution is Blank 1_________ m (3 dec places).
The molar mass of the unknown is _________ g/m (0 dec places.
What mass of NaN3(s) must be reacted in order to inflate an air bag to 74.6 L at STP?
In order to induce the error in the precision and accuracy section ,a) would the balance be registering masses too low or too high?
How many moles of oxygen are combined with 4.20 moles of chlorine atoms in C2O7?
The enthalpy change for converting 10.0 g of ice at -25.0°C to water at 80.0°C is __________ kJ. The specific heats of ice, water, and steam are and respectively. For H2O, Hfus = 6.01 kJ/mol, and
What is the importance of chemistry to agriculture, Write summary of total one page and include references as well.
C2H6+O2 ---> CO2+H2O Calculate the mass of H2O that should form if 1.5 g of C2H6 is combusted in the presence of 2.5 g of O2.
A compound A (C6H6) undergoes catalytic hydrogenation over Lindlar catalyst to give a compound B, which in turn undergoes ozonolysis followed by workup with aqueous H2O2 to yield succinic acid and two equivalents of formic acid.
A skyscraper in Pittsburg, built in the early 1970's, is supported by water filled columns. Potassium carbonate was added to the water to precent freezing during cold weather. If the solution is 40.0% K2CO3 by mass, what is the predicted freezing ..
The equation for the complete combustion of ethene (C2H4) is C2H4(g) + 3 O2(g) ==> 2CO2(g) + 2H2O(g) If 2.70 mol C2H4 is reacted with 6.30 mole O2,
Write a balanced equation for the conversion of C6H5CHOHCH3 to methyl ketone in the presence of I2 and NaOH. Identify which is being oxidized and which is being reduced.
Substances A, B, and C can all act as oxidizing agents. In solution, a is green, B is yellow, and C is red. In the reactions in which they participate, they are reduced to A^-, B^-, and C^- ions, all of which are colorless.
When solid copper is added to nitric acid, copper(II) nitrate, nitrogen dioxide, and water are produced. Write the balanced chemical equation for the reaction. (Use the lowest possible coefficients. Use the lowest possible coefficients. Include st..
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