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A standardized solution that is 0.0100 M in Na is essential for a flame photometric determination of the element. Explain how many grams of primary-standard-grade sodium carbonate are necessary to prepare 700.0mL of the solution?
what molar ratio of benzoate ion to benzoic acid would be required to prepare a buffer with a ph of 5.20? kac6h5cooh
From data below, calculate the total heat (in J) associated with the conversion of 0.499 mol ethanol gas (C2H6O) at 301°C and 1 atm to liquid ethanol at 25.0°C and 1 atm.
The enthalpy of combustion for propane is -2044 kJ/mol. How many liters of propane (at STP) must be burned in order to convert 400 grams of ice initially at -9°C to liquid water at 84°C
A 50.0-mL solution of 0.031 9 M benzylamine was titrated with 0.050 0 M HCl. Calculate the pH at the following volumes of added acid: Va = 0, 12.0, 30.0,0.5 Ve, Ve, and 35.0 mL.
Assuming that the electrical conductivity of a FCC unit cell of copper depends on the path of electricity along cube. Would this also be true if a multiple crystal sample of copper was used instead of the single crystal used in the above assumptio..
What pressure of O2 would be required to have a solution of 1.5X10^-3g of O2 in 250g of H2O at 298K?
How many non-bonding valence electrons are there in a molecule of citric acid? please show how to calculate/count them up.
a) What are the mole fractions of each component in a mixture of 5.10 g of O2, 7.44 g of N2, and 1.26 g of H2. O2 Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully.
compound q has a molecular formula c6h10. q reacts rapidly with br2ccl4 and also reacts rapidly with cold concentrated
The Kingston Steam Plant burns 14,000 tons of coal each day and generates 1010 kilowatts-hours of electricity each year (enough for 700,000 homes). Coal is primarily carbon which undergoes combustion in the following reaction
Exhaling during breathing is doing work since air is moved against atmospheric pressure. Calculate the work done in J when 0.500L of air is exhaled into an empty balloon at an atmospheric pressure of 1.00 atm.
Rates of reactions: Rate = k [A]^m [B]^n where the reaction time = 1 / Rate. Two chemical experiments were performed to determine the exponent "n". (We will assume that "m" is known).
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