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The concentrations of Al and K in a sample of riverwater are 0.050 mg/kg and 1.3 mg/kg, respectively. Express the concentration in molality.
1. Al =
2. K =
The following oxidation/reduction reaction of copper and tin has an equilibrium constant equal to 1.48 at 300 Kelvin. At this temperature the equilibrium concentrations are measured to be [Sn^2+]=0.124 M, [Cu+]=0.148 M and [Sn^4+]=0.176.
A student mistakenly added concentrated (12M) HCl to a sample of unknown, instead of adding 6M hcl as directed. (1) at first, a large amount of light-colored precipitate formed
How many molecules of ice at 0 degrees celsius can be melted from the complete transfer of the heat involved when 25.6 Grams of nitrogen is reacted with 34.5 L Of hydrogen gas at STP.
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 to 650psi at a temperature of 26oC?
What is the equilibrium concentration of fluorine if the initial concentrations of bromine and fluorine were 0.113 moles/liter in a sealed container and no product was present initially
A gas sample containing 1.35 mol at 25°C exerts a pressure of 405 torr. Some gas is added to the same container, and the temperature is increased to 50.°C. If the pressure increases to 800. torr, how many moles of gas were added to the container?
Is sodium prechlorate an aques solution. And also, how do you differentiate a solid, liquid, gas, and aquesous solution just by the equation
Calculate the delta H reaction for the combustion of glucose (C6H12O6) using delta H(f knot) values. Calculate the delta H(f knot) of glucose to be used in the above calculation using the following information.
At high temperatures, ammonia can react with oxygen according to the following unbalanced reaction: NH3 + O2 ---> NO + H2O If 5.76 moles of NH3 react with 12.2 moles of oxygen
What is the nickel ion concentration in a solution prepared by mixing 451 mL of 0.414 M nickel nitrate with 465 mL of 0.364 M sodium hydroxide?
How much heat is produced in burning 8 mol of CH4 under standard conditions if reactants and products are brought to 298 and H2 O(l) is formed. What is the maximum amount of useful work that can be accomplished under standard conditions by this sy..
Benzyl bromide reacts rapidly with sodium iodide in acetone, and also reacts rapidly with ethanol and silver acetate. Bromobenzene doesn't react under either of these conditions. Explain.
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