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Potassium sulfate is commonly used in fertilizers. An agricultural researcher in alaboratory measures and weighs a 150.0-g sample of potassium sulfate for herexperiment. The solid sample is dissolved in enough water to make an 800.0 mLsolution. How many potassium ions (in mol) are contained in the 150.0-g sample?
C6H6 gas is burned in the presence of excess oxygen. What volume of liquid water could be condensed from combustion of 12.0 moles of Benzene (C6H6)? Assume density of water 1.0 g/mol.
Imidazole is a weak acid, and thus reacts with strong bases to form the corresponding anion. Show this reaction, and draw resonance structures that account for the stability of conjugate base.
Determine the pH of a 0.075 M aqueous solution of magnesium fluoride. For hydrofluoris acid the Ka is 7.0 x 10^-2.
15.0 mL of 0.50 M HCl is added to a 100.-mL sample of 0.496 M HNO2 (Ka for HNO2 = 4.0 × 10-4). What is the equilibrium concentration of NO2- ions?
A buffer solution is made by making a 100 mL aqueous solution containing 2.6 grams of citric acid (C6H8O7) and 6.4 grams of potassium citrate (C6H7O7K). What is the pH of this buffer solution
burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 4.701 °C. What is the heat capacity (calorimeter constant) of the calorimeter?
Explain the metabolism of a protein polymer include both the catabolic and anabolic pathways. Comprise any substrates or metabolic intermediates. Classify whether there is energy output or energy input
Determine ΔHvap for a compound that has a measured vapor pressure 24.3 torr at 273 K and 135 torr at 325 K: 1. 34 kJ/mol, 2. 13 kJ/mol, 3. 24 kJ/mol, 4. 79 kJ/mol, 5. 41 kJ/mol
A gaseous compound containing hydrogen and carbon is decomposed and found to contain 85.63% C and 14.37% H by mass. The mass of 258 mL of the gas, measured at STP, is found to be 0.646 g. What is the molecular formula of the compound?
The Orsat analysis of the flue-gas gives 13.9% CO2, 0.8% CO, 4.3% O2, and 81.0% N2. Calculate the percent of excess air based on complete combustion of the coke.
which gas sample contains the largest number of mole?
Question- Write the balanced equation for the reduction of 2,6 dimethylnitrobenzene to give 2,6-dimethylaniline using stannous chloride, snCl2 in concentrated hydrochloric acid
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