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calculate the mass of silver chloride and dihydrogen monosulfide formed when 85.6 grams of silver sulfide reacts with excess hydrochloric acid.
what is the volume of 45.6g of silver if the density of silver is 10.5g/ml?
the enthalpy of formation of ethanol, C2H5OH, is -277.0 kJ/mol at 298.15k. calculate the enthalpy of combustion of one mole of ethanol, assuming that the products are CO2 (g) and H2O.
A buffer is made using 45.0 mL of 0.750 M HC3H5O2 and 55.0 mL of 0.700 M NaC3H5O2.What volume of 0.10 M NaOH must be added to change the pH of the original buffer solution by 2.5%? Ka for this acid is 1.3 x 10
Calculate w (in kJ) when 422 g iron (III) oxide (MM = 159.7 g/mol) reacts with excess carbon to produce carbon dioxide gas at 445 K:
A 37.4-L volume of methane gas is heated from 22 degrees C to 78 degrees C at constant pressure. What is the final volume of the gas?
A 2.32 L balloon contains helium at 1.00 atm and 25°C. How many grams of helium are contained in the balloon.
Calculate the pH of a system composed of 0.135 M HC7H5)2, benzoic acid and 0.176 M KC7H5O2, potassium benzoate.
Consider the following observations taken on successive, cloudless autumn mornings. On the first day, a considerable amount of frost is on the grass at sunrise. On the second day, only dew appears on the grass. On which day is the temperature incr..
A rigid flask is initially filled with 4.00 atm of NO2(g) and no N2O4(g) at 100 C. After equilibrium is achieved, the pressure of NO2 is 1.56 atm.
Q 3: The salt NaBrO(3) oxides Sn^2+ to SnCl(6)^2- in the presence of hydrochloric acid according to the equation
10.9g of ice at 0.00 degrees C is mixed with 50.0g of water at 32.0 degrees C. What is the final temperature of the mixture? (heat of fusion=333J/g; specific heats: ice=2.09J/gK; water=4.184J/gK
Consider a lake containing 39 ppb (parts per billion) of parathion, which has a log Kow = 3.8. If a sample of lake water was mixed with octanol, what is the expected concentration of parathion in the octanol?
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