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When a 1.50x102 g strip of zinc is dropped into a large beaker containing excess hydrochloric acid, how many grams of gas are formed?
How much heat in is evolved or absorbed in the reaction of 2.28 grams of sodium ( Na) with water( H 2 O), express your answer in kilocalories?
A certain first-order reaction (A products) has a rate constant of 4.80×10-3 s^-1 at 45 C. How many minutes does it take for the concentration of the reactant, [A], to drop to 6.25% of the original concentration?
A 4.30 g nugget of pure gold absorbed 293 J of heat. The initial temperature was 29.0°C. What was the final temperature?
How much energy would be required to melt 48 g of HCl at its melting point of -110.8C? Hfus for HCl is 14.2 cal/g and Hvap for HCl is 98.7 cal/g.
a first order reaction has a rate constant 0.00510.if we begin with 0.10 M concentration of the reactant , how much of the reactant will remain after 3 hrs?
An unknown amount of water is mixed with 370mL of a 6M solution of NaOH solution. A 75mL sample of the resulting solution is titrated to neutrality with 50.7mL of 6M HCl.
Express your answer to three significant figures and include the appropriate units. 0.037 Correct Part B What pressure is required to achieve a concentration of 7.10×10?2 at 20?
At constant pressure and 25 degrees celcius a sample of gas occupies 4.5 liters. At what temperature will the gas occupy 9.0 liters?
a sample of gas occupies 12 liters under a pressure of 1.2 atm. what would its volume if the pressure were increased to 2.4 atm? assume the the temperature of the gas does not change.
Calculate the mass of urea that should be dissolved in 225 g of water at 35°C to produce a solution with a vapor pressure of 37.1 mmHg.
Estimate dissociation energy of HF using simpe additivity rule If given that d(H-H) and D(F-F) IN H 2 is 336kj/mol and F2 is 258 kj/mol
Rhodium has a density of 12.45 g/cm3. This metal crystallizes in a face-centered cubic unit cell. Calculate the diameter of a rhodium atom?
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