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200 mL sample of lake water is contaminated with a single monoprotic acid. titrating this sample with a .005 M NaOH required 7.3 mL of the NaOH solution to reach the endpoint. what is the concentration of H in the lake
A gas occupies a volume of 925mL at 30 degrees celcius and 1.2atm. What volume will it occupy at STP?
Calculate the cell potential (emf) for a galvanic cell at 298 K composed of a standard aluminum electrode (Al metal and Al 3+ ions at 1.0 M) and a standard cadmium electrode (Cd metal and Cd 2+ ions at 1.0 M.)
solution of an unknown acid has a ph=1.776. What is the value of acid dissociation constant?
Magnesium hydroxide (Mg(OH)2) reacts with hydrochloric acid to produce magnesium chloride and water. How many liters of 0.8 M HCl react with 0.25 grams of magnesium hydroxide
Assume that a particular reaction evolves 245kJ of heat and that 24kJ of work is gained by the system what is the delta H inside and the surroundings
A 1.800 g sample of octane, C8H18, was burned in a bomb calorimeter whose total heat capacity is 11.66 kJ/°C. The temperature of the calorimeter plus contents increased from 20.01°C to 29.99°C. What is the heat of combustion per gram of octane?
Why is water a reactant in the fermentationof sucrose? Enter the solubility-product expression
How much heat is evolved when 1259 g of water condenses to a liquid at 100°C? ΔHcond = -40.7 kJ/mol.
A sculptor has prepared a mold for casting a bronze figure. The figure has a volume of 225 mL. If bronze has a density of 7.8 g/mL
What is the freezing point of a solution containing 5.43 grams of butane (molar mass = 58.8 g/mole) dissolved in 50.0 grams of octane? The freezing point of pure octane is 25oC and the freezing point depression constant kfp is 3.42 oC/m.
As a chemist for an agricultural products company, you have just developed a new herbicide,"Herbigon," that you think has the potential to kill weeds effectively
A gaseous mixture contains 420.0 Torr of H2(g), 391.3 Torr of N2(g), and 79.5 Torr of Ar(g). Calculate the mole fraction, X, of each of these gases.
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