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The normal freezing point of water H2O is 0.00 oC and its Kf value is 1.86 oC/m. Assuming complete dissociation of the electrolyte, if 11.07 grams of potassium bromide (KBr, 119.0 g/mol) are dissolved in 266.7 grams of water what is the freezing point of the solution?
Determine the freezing point of a solution which contains 0.31 mol of sucrose in 175 g of water. Kf = 1.86°C/m
For the reaction: N2(g) + 2 O2(g) ? 2 NO2(g), Kc = 8.3 × 10-10 at 25°C. What is the concentration of N2 gas at equilibrium when the concentration of NO2 is twice the concentration of O2 gas.
A 248 gas sample has a mass of 0.433 g at a pressure of 745 mm Hg and a temperature of 28 C. What is the molar mass of the gas?
Consider the following reaction, where X represents and unknown element. 6X(s) + 2B2O3(s0 = B4X3(s) + 3XO2(g) If 165 grams of X reacts completely with diboron trioxide to rproduce 2.29 mol of B4X3.
95.0 mL of H_2O is initially at room temperature (22 C). A chilled steel rod at 2 C is placed in the water. If the final temperature of the system is 21.4 C, what is the mass of the steel bar?
when 7.00 moles of gas A and 3.00 moles of gas B are combined, the total pressure exerted by the gas mixture is 1.0 atm. What is the partial pressure exerted by gas a in this mixture
Find the volume and the intermolecular force present in ammonia at STP in the following reaction and What is the intermolecular force is present in NH3(g).
Naming compounds containing double as well as triple bonds, Alkenes contain double bonds while alkynes contain triple bonds. How do you name a compound that has both a double and a triple bond
A particular coal contains 2.92% sulfur by mass. When this coal is burned, the sulfur is converted into sulfur dioxide gas. The sulfur dioxide gas then reacts with calcium oxide to form solid calcium sulfite
Calculate the mass of urea that should be dissolved in 187 g of water at 35C to produce a solution with vapor pressure of 37.7 mmHg
ond weighs 44.0 carats. Determine the volume occupied by the diamond, given that its density is 3.5 g/cm3 at 20°C, and that 1 carat = 0.200 g.
For the isoelectronic series[V(CO)6]-, Cr(CO)6, and [Mn(Co)6]+, does the energy of the metal to ligand charge-transfer bands increase or decrease with increasing charge on the complex? Why?
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