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Define a 0.1747-g sample of solid magnesium is burned in a bomb calorimeter that has a heat capacity of 1769 J/°C.
The calorimeter contains exactly 361 g of water and the temperature increases by 1.126°C. Compute the heat given off by the burning Mg, in kJ/g and in kJ/mol.
Number of Moles and Conversion, a) Number of moles of carbon atoms in 0.585 moles C4H10
aqueous HF and treated with nitron solution to precipitate a mixture of nitron tetrfluoroborate and nitron nitrate weighing 1.322 g. Find the weight percent of Mg in the original mixture.
when 100g Mg3N2 reacts with 75.0g H20, 15.0g of NH3 is formed. What is the percent yield? Mg3N2+6H2O-->3Mg(OH)2+2NH3
A restriction enzyme has a recognition seuence between G and C in a palindrome. Show the products of the followling double stranded DNA upon treatment with the enzyme
Explain why a hydroxyl group in the para position (p-hydroxybenzoic acid, pKa=4.48) decreases the acidity while a hydroxyl group in the meta position (m-hydroxybenzoic acid, pKa=4.07) increases the acidity relative to benzoic acid (pKa=4.19).
what is the composition in atom percent of an alloy that consists of a 91.5 wt ag and b 8.5 wt cu? assume that the
For 1.000 kg of CH4, Compute the change in entropy when the temperature is raised from 300 K to 1000 K at 101 kPa. Over this temperature range, Cp = 14.15 + 75.5x10-3T - 180x10-7T2, where Cp is in units of J K-1 mol-1
The vapor pressure of liquid Ni is 0.100 torr at 1606 degrees C and 1.00 torr at 1805 degrees C. The molar heat of fusion of Ni is 3.25 kcal/mol. Determine the vapor pressure of solid Ni at 1200 degrees C.
Many gases are shipped in high-pressure containers. Consider a steel tank whose volume is 65.0L and which contains O2 gas at a pressure of 16,500kPa at 23°C.
Suppose you measured the pressure with a barometer which was not vertical. You measured the pressure to be 752mmHg and then noticed the barometer
A solution of calcium ions contains 5 meq/650. cm3 of calcium ion. How many moles of calcium ion does this solution contain?
The drying oven, although thought (and assumed) to be set at 125 degrees C, had an insie temperature of 84 degrees C. How will this error affect the reported percent by mass of the limiting reactant in the salt mixture
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