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Question: A sucrose (table sugar, molar mass 342 g/mol) solution was made by dissolving 68.2g of sucrose in 800 g of water. What is the freezing point of this solution if Kf of water is 1.86 degrees C/Molal?
A mixture of 4.50 g of He, 12.0 g of Ne, and 29.0 g of Kr is placed in a cylinder at STP. Calculate the partial pressure of each gas.
water flowing through pipes of carbon steel must be kept at PH 5 or greater than limit corrosion if an 8.0 *10^3 Ib/hr water stream contains 10 ppm sulfuric acid and 0.015% acetic acid
at 25degc k 0.090 for the following reaction.h2og cl2og 2 hoclgcalculate the concentrations of all species at
The first-order decomposition of phosphene to phosphorus and hydrogen 4PH3(g) → P4(g) + 6H2(g)
In temperature dependance of reaction rates, if you use R=8.314 J/molxK, what should the units be for Ea in the absence of conversions
calculate the pH of a solution contaning 0.2m acetic acid (pka=4.7) and 0.1 m sodium acetate? a. write the equation ph=pka+log [A-]/[HA]
a vessel of 1.000 l is filled with 1.000 mole of h2 2.000 moles of n2 and 2.000 moles of ammonia. nbspconcentration of
Write the balance equation and predict the moles of ammonia that can be made using usng 22.4g of nitrogen and an unlimited amount of hydrogen
Assume that the amino acids with ionizable side chains have the following pKas: Asp 3.65; Glu 4.25; His 6.0; Lys 10.53, Arg 12.48; Cys 8.18; Tyr 10.07. Also Assume that the a-amino group has a pKa of 9.62, and the a-carboxyl group has a pKa of 2.3..
The acid-dissociation constant for an acid-base indicator HIn is 0.0000438. At 600 nm, the molar absorptivities are 2230 for HIn and 8900 for In-. Calculate the absorbance at 600 nm of a 1.00 x 10-4 M solution of the indicator at pH 4.81 in a 1.00..
the crucible is handled with oily fingers after its mass measurement but before the 3g sample of the hydrated salt is
The mass of a cube of iron is 439 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
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