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At 2000°C the equilibrium constant for the reaction is Kc = 2.4 x 10^3. If the initial concentration of NO is 0.100 M, what are the equilibrium concentrations of NO, N2, and O2?
The reactant concentration in a zero-order reaction was 7.00×10-2 M after 155 s and 1.50×10-2 M after 370 s. What is the rate constant for this reaction?
A graduated cylinder contains 155 mL of water. A 15.0 g piece of iron (density = 7.86 ) and a 20.0 g piece of lead are added. What is the new water level in the cylinder?
A metal sample weighing 45.0 grams and at a temperature of 99.1 degrees Celsius was placed in 38.6 grams of water in a calorimeter at 25.0 degrees Celsius. The calorimeter reached a maximum temperat
How is the solubility of manganese(II) sulfide affected by the addition of aqueous potassium hydroxide to the system?
Calculate the molarity and mole fraction of acetone in a 1.82 molality solution of acetone in ethanol. Density of acetone is .788 g/cm^3.
Imagine that you have two iron blocks, one with a mass 226 g at a temperature of 46.0 oC, and another with a mass 380 g at a temperature of 134 oC.
compressed gas cylinder contains 1.00 x 103 g of argon gas. The pressure inside the cylinder is 2050 psi at a temperature of 18oC. How much gas remains in the cylinder if the pressure is decreased t
For the reaction 2A + B --> 2C, if B is initially 4.0M and 2min later is 3.0M, what is the rate of appearance of C?
The mass ratio of sodium to fluorine in sodium fluoride is 1.21:1. A sample of sodium fluoride produced 36.5 {rm g} of sodium upon decomposition. How much fluorine (in grams) was formed?
A particular equilibrium mixture at that temperature contains gaseous HI at a partial pressure of 0.500 atm and hydrogen gas at a partial pressure of 0.200 atm. What is the partial pressure of I2?
AlBr3 is sold as a solution in CH2Br2. This is a rather exotic solvent and somewhat difficult to work with as well, because of its relatively high boiling point. CH2Cl2 is much more convenient to us
How many liters of CH4 at 27 degrees C and 1.5 atm are required to react with 1 mole of oxygen? (13) (00821) (300K) / 1.5 atm = 320.19/1.5 = 213.46 liters CH4 Is this right?
A 670 mL gas sample at STP is compressed to a volume of 284 mL, and the temperature is increased to 20 C. What is the new pressure of the gas in Pa? Answer in units of Pa.
What would happen to the pressure of a confined gas sample if the volume of that sample was decreased while the temperature was held constant?
Calculate the mass/volume percent of a solution in which 168 of is dissolved in enough water to give a total volume of 1.28 .Express your answer numerically.
Propanoic acid (CH3CH2COOH) has a Ka of 1.34 × 10-5. A 25.00 mL sample of 0.1000 M propanoic acid (in flask) is titrated with 0.1000 M NaOH solution, added from a buret. Carry out the calculat
Helium gas at 25 oC filled a balloon to a volume of 2.25 L. What would the volume of this balloon be when cooled (at constant pressure) to liquid-nitrogen temperature (-196 oC)?
A syringe initially holds a sample of gas with a volume of 285 mL at 355 K and 1.88 atm. To what temperature must the gas in the syringe be heated/cooled in order to have a volume of 435 mL at 2.50
Explain how alkene/aromatic C-H stretches are distinguishable from alkane C-H stretches. DO the C-H stretch peaks in the IR spectra of triphenylmethanol, bromobenzene, and benophenone occur.
A solution of ethanol (C2H5OH) in water is prepared by dissolving 90.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 255.0 mL of solution. What is the molarity of the ethanol in this
A cylinder of compressed nitrogen gas contains 867 g N2. If the volume of the cylinder is 22.5 L, what is the pressure of the N2 if the gas temperature is 298K?
What will be the impact on mechanical properties of the blend if the components are immiscible?