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A 1.70-g sample of a large biomolecule was dissolved in 11.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule. For carbon tetrachloride, the boiling point constant is 5.03°C · kg/mol, and the boiling point of pure carbon tetrachloride is 76.50°C.
The most common source of copper is the mineral chalcopyrite (CuFeS2) how many kilograms of chalcopyrite must be mined to obtain a 440 grams of pure copper.
Calculate ΔHo fusion and ΔSo fusion for the substance If the pressure is increased to 120 bar, the melting temperature increases to 375.88 K. ?
The concentrations of lead in blood samples are often reported in units of micromoles of lead per liter of blood. Calculate the value of the concentration in these units of a blood sample containing 45 ppb lead.
The concentration of phosphoric acid in Coke is approximately 106.0 mg/mL. Assuming phosphoric acid is the only acid in Coke, calculate the pH of a 355 mL can of Coke.
The decay constant for strontium- 90 is 0.0247 y^-1. how many grams of strontium-90 remain if 10.0g decay for exactly 60 years.
65.50 mL of 0.161 M HF is titrated with 0.1200 M NaOH. What is the pH at the equivalence point.
when 15.0g of steam drops in temperture from 275.0C to 250.0C how much heat is released csteam=2.01j/gC
Compute the ratio of the concentration of H 2 CO 3 to that of the HCO 3- if The pH of a bicarbonate-carbonic acid buffer is 8.50
You are required to prepare a review-type essay on Electrochemistry. Insert your completed review essay into a soft-bound cover with a clear plastic front.
Suppose you wanted to heat a mug of 250. mL water from room temperature, 25°C, to 100°C to make a cup of tea. How much energy (in joules and in calories) would you need from your microwave.
Consider the following reaction: CO + 2H2= CH3OH, kp= 2.26 x 10^2 at 25C . Calculate delta G for the reaction at 25C under each of the following conditions.
A gas occupying a volume of 248 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume.
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