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1. According to the Bronsted-Lowry definition, which chemical in the following reaction is the base? H3PO4 + H2O -> H3O+ + H2PO4- (Points : 5) H2O H3O+ H3PO4 H2PO4- None of the above 2.Which is reduced in the following reaction? 2 Bi3+ + 3 Mg -> 2 Bi + 3 Mg2+ (Points : 5) Mg Bi Mg2+ Bi3+ None of the above 3. Which is the pH of a solution with a [H3O+] of 1 × 10-9 M? (Points : 5) -9.0 5.0 -5.0 9.0 None of the above 4. A sample of helium gas occupies 1,521 mL at 719 mmHg. For a gas sample at constant temperature, determine the volume of helium at 745 mmHg. (Points : 5) 5. A gas at a temperature of 85 degrees C occupies a volume of 175 mL. Assuming constant pressure, determine the volume at 15 degrees C. (Points : 5) 6. For a gas at standard temperature and pressure with a density of 1.75 g/L, determine its molar mass. (Points : 5) 7. Calculate the pressure, in atmospheres, of 3.94 mol CO(g) in a 4.25 L tank at 31 degrees C. (Points : 5)
Calculate the heat that must be supplied to 10.8 g of Ne at .15 atm to raise its temperature from 28C to 51C at constant pressure. Assume that neon behaves as an ideal gas.
what is the volume percent of a solution prepared by dissolving 43 g of NaOH in enough water to make a final volume of 120 ml.
How many simabonds are there in a C60 molecule? 2. Which has stronger carbon-carbon bonds: graphite, diamond or C60? Please explain
When iron chloride FeCl3 is dissolved in water the solution becomes acidic. The preparation of the Fe(NO3)3 solution and the KSCN solution used 0.5 M HNO3 as the solvent instead of water. Explain why this was done
Calculate the maximum amount of thorium ion that could be present in a waste water, if it is made 0.1500 M in oxalate ion. Assume the oxalate is present in stoichiometric amount, compared to the thorium.
Boron has two naturally occurring isotopes, 10B (19.9%)and 11B (80.1%). Although the B2 moleculedoes not exist naturally on Earth, it has been produced in the laboratory and observed in stars. (a) How many differentB2 molecules are possible? (b) W..
Calculating standard enthalpy change, heat, and mass of a reaction, Methanol (CH3OH) is used as fuel in race cars. Calculate the standard enthalpy change for the reaction, assuming H2O(g) as a product.
The % ionization of a weak acid always declines in a solution that contains the salt of the anion relative to a solution of the acid alone. For example the % dissociation of the acetic acid is less in a solution that contains sodium acetate than i..
What is the molarity of sulfuric acid in the solution? How long (in seconds) would it take to fill a 55 gallon drum, and how much sulfuric acid (lb_m) would the drum contain? (use two dimensional equations)?
When a solution of copper(II) sulfate is mixed with a solution of sodium carbonate, a precipitate forms. Write each of the following equations for the reaction between copper(II) sulfate and sodium carbonate.
A patient needs to take 625 of ibuprofen twice daily. The pills in the bottle are each 250. . How many pills does the patient need to take each time she wants the 625 dosage? Assume that these pills are scored and can be cut in half if necessary.
determine the specific heat capacity of a metal that has a mas of 14 grams. As the metal cools from 400 degrees celcius to 200 degrees celcius, 364 joules of heat is released
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