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The decomposition reaction is at equilibrium, how would the following changes affect the total quantity of ammonia in the flask once equilibrium is re-established?
a 12.6 g sample of NH4NO3 is dropped into a constant-pressure calorimeter containing 175 g of water at 23.5 C. What temperature will the water reach, assuming that the calorimeter container does not
For the equation 3Fe+4H2O=4H2+Fe3O4 If 625 g of Fe3O4 is produced in the reaction, how many moles of hydrogen are produced at the same time?
Given the following equation, what volume of hydrogen gas, H2, is released at STP conditions by the action of 8.18 g of Zinc;
Diethyl ether is a volatile organic compound. the vapor pressur of diethyl ether is 401 mmhg at 18 degrees C and th hat of vaporization = 26.o kJ/mol. calcuate the vapor pressure of diethyl ether at
A mixture of CO, CO2 and O2 is contained within a 275 mL flask at 0C. If the total pressure is 780 torr, the CO has a partial pressure of 330 torr and the CO2 has a partial pressure of 330 torr, wh
Write a chemical equation for this process, which occurs in an acidic environment. (b) Estimate the values of E⊕, ΔrG⊕, and K for the reaction at 25°C.
how much energy is liberated when 366 g of mercury (c=0.139j/g degrees celsius)cools from 77.0 to 12.0 degrees celsius?
How many moles of phosphine (PH3) are produced for every 4.0 moles of hydrogen that react according to the chemical equation below? Hint: Mole-Mole Cal.
suppose a can contains gas at a pressure of 755 mm Hg and a temperature of 25 degrees celsius, what would be the pressure if the can was heated to 1155 degrees celsius .
A rectangular block has dimensions 2.9 cm . 3.5 cm . 10.0 cm. The mass of the block is 615.0 g. What are the volume and density of the block?
A sample of He gas has a volume of 900 mL and a pressure 2.50 atm at 298 K. What is the new pressure when the temperature is changed to 336 K and the volume is decreased to 450 mL?
a 70g piece of ice at 0c is added to a sample of water at 6 c, all of the ice melts and the temp of the water decreases to 0 c, how many grams of water were in the sample?
Calculate the mass percentage of hydrogen peroxide in the solution. What is the concentration of hydrogen peroxide in parts per million? What is the molarity?
What is the pressure of 170. mL of oxygen gas at 76.0°C and 170. mm Hg if the conditions are adjusted to 450. mL and 127°C? Assume the amount of gas is held constant.
What will be the volume of the gas sample if the pressure increases to 780 mm and the temperature increases to 35°C?
225.0 mL of ethanol (density = 0.789 g/mL) initially at 7.4°C is mixed with 32.1 mL of water (density = 1.0 g/mL) initially at 25.3°C in an insulated beaker. Assuming that no heat is lost, w
The heat of hydrogenation of X is less than that of Y. X and Y react with HBr to form a mixture of the same bromoalkanes, and they both undergo hydroboration/oxidation to give a mixture of the
Assume that the density of all solutions is 1.00 g/mL and the specific heat of the mixed solution is 4.18 J/goC. What is the heat of neutralization of 1 mol of hydrochloric acid?
Silver consists of two major isotopes with the following percent abundances and atomic masses: 107Ag (51.84% and 106.90509 amu) and 109Ag (48.16% and 108.90476 amu). Calculate the average atomic mas
An acid solution is 0.100 M in HCl and 0.190 M in H2SO4.What volume of a 0.150 M KOH solution would have to be added to 550.0 mL of the acidic solution to neutralize completely all of the acid?
if 25.0 milliliters of .2oo molar BrO3- is mixed with 30.0 milliliters of .450-molar Br- solution that contains a large excess of H+, the amount of Br2, formed, according to the equation above, is ?
What is the pH of a solution prepared by mixing 25 mL of 0.10 M methylamine with 25 mL of 0.10 M methylammonium chloride?
how many moles of oxygen are consumed each time 0.500 mole of P2O5 is formed?