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Problem- A 5.50 L of sample of gas is cooled from 91 degrees Celsius to a temperature at which its volume is 4.10 L. What is this new temperature? Assume no change in pressure of the gas.
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the density of a particular brand of gasoline at room temperature is .70gml. if the gas tank of a car holds 10.0
when a 50.0-g nugget of pure gold is heated from 35.0 C to 50.o C, it absorbed 5200.0J of energy. find the specific heat of gold.
a balloon is inflated with 0.2492 grams of helium to a pressure of 1.26 atm. if the desired volume of the balloon is
A 25.0-mL sample of 0.35 M HCOOH is titrated with 0.20 M KOH. What is the pH of the solution after 25.0 mL of KOH has been added to the acid? Ka = 1.77 × 10-4
would a given amount of flourine react with different masses of the two hydrogen isotopes? Does this violate the law of definite proportions.
A reaction mixture initally contains 0.56 atm CO2 and 0.32 atm CO. Determine the equilbrium pressure of CO if Kp for the reactions at this temperature is 2.25?
1. how many grams of solute are needed to prepare a910.0 ml of a 6.75 x 10-3nbspm potassium carbonate solution?2. 320 g
A 4.16 g sample of ascorbic acid is titrated with 0.83 M red dye. What volume of red dye is required to reach the endpoint? Molar mass of red dye =267.08 g/mol; molar mass of ascorbic acid =176.12 g/mol
the same volume ofco2 at the same temp. and pressure is liberated from 1.000g of dolomite byadding an excess of hcl as
Compute the volume (in mL) of a 0.410 M KOH solution that must be added to 4.250 g of HEPES (MW=238.306 g/mol, pKa = 7.56) to give a pH of 7.36.
Complete and balance the following equation, and identify the oxidizing and reducing agent.(Write down each of the half reactions) Cr2O7^2-(aq)+Fe^2+(aq)-->Cr^3+(aq)+Fe^3+(aq) (acidic)
Copper is electroplated from CuSO4 solution. A constant current of 4.00 amp is applied by an external power supply. How long will it take to deposit 1.00 x 10^2 g of Cu. The atomic mass of copper is 63.546.
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