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Get college assignment help at uniessay writers A beaker with 105 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 5.50 mL of a 0.300 it M rm HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760.

It takes 51.0 J to raise the temperature of an 11.0 g piece of unknown metal from 13.0 degrees celcius to 24.0degrees celcius What is the specific heat for the metal? Express your answer numerically, in Joules/gram Degrees celcius

what is Au electron configuration?

a 102 gram sample of an unknown hydrocarbon is burned in oxygen to produce carbon dioxide and water. if 322 grams of carbon dioxide are produced what was the weight percent of carbon in the original sample?

If a bottle of nail polish remover contains 183 of acetone, how much heat would be released by its complete combustion? The density of acetone is 0.788 .

A 2.50-g sample of a large biomolecule was dissolved in 19.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule. For carbon tetrachloride, the boiling point constant is 5.03°C · kg/mol, and the boiling point of pure carbon tetrachloride is 76.50°C.

A 4.2-g sample of Colorado oil shale is burned in a bomb calorimeter, which causes the temperature of the calorimeter to increase by 5.0 degrees C. The calorimeter contains 1.00 kg of water (h20=4.184J/gC) and the heat capacity of the empty calorimeter is .10 kJ/C. How much heat is released per gram of oil shale when it is burned?

A spherical glass container of unknown volume contains helium gas at 25°C and 1.900 atm. When a portion of the helium is withdrawn and adjusted to 1.00 atm at 20.°C, it is found to have a volume of 2.00 cm3. The gas remaining in the first container shows a pressure of 1.710 atm. Calculate the volume of the spherical container.

A cube of gold-colored metal with a volume of 59cm^3 has a mass of 980 g. The density of pure gold is 19.3 g/cm ^3. Is the metal pure gold? Show calculations to justify your answer.

Use the data in Table 5.4 to calculate the partial pressure of NO in dry air assuming that the total pressure is 2.9 atm. Assuming a temperature of 0°C, calculate the number of molecules of NO per cubic centimeter. Table 5.4 is attached. It says that the mole fraction for NO is 5e-7.

Get college assignment help at uniessay writers (a) Calculate the pressure (in atm) exerted by 0.5180 mol N2 in a 1.0000 L container at 25.2°C using the ideal gas law. (b) Calculate the pressure (in atm) exerted by 0.5180 mol N2 in a 1.0000 L container at 25.2°C using the van der Waals equation. (c) Compare the results. (Write the percentage difference between the results, based on the higher value result.)

Which of the following diatomic species are paramagnetic and which are diamagnetic? A blank molecular orbital diagram (Part B 1 figure) has been provided to help you. Drag the formulas to the appropriate magnetic bin :C2^2 ,Li2^2-,B2^2-

determine the molar solubility of CaCl2 is Ksp=2.5X10^2

How many grams of Na3PO4 is needed to produce 575mL of a solution that has a concentration of Na ions of 1.50M?

explain the hazards associated with 1.0M CH3COOH solution, .10M BaCl2 solution, and .10M Na2C2O4

P4(s) 6F2(g) –> 4PF3(g) How many grams of fluorine are needed to react with 6.20g of phosphorus?

How much heat is required to warm 1.20 of water from 20.0 to 100.0 ? (Assume a density of for the water.)

The following system is at equilibrium: Classify each of the following actions by whether it causes a leftward shift, a rightward shift, or no shift in the direction of the net reaction. 1) Add more X 2) Decrease X 3) Decrease Volume 4) increase volume

A beaker with 180ml of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100M. A student adds 5.00ml of a 0.270M solution to the beaker. How much will the pH change? The of acetic acid is 4.760.

A nitrogen atom is the central atom in laughing gas, N2O, dinitrogen oxide, which has the following characteristics: a. Bent, polar b. Bent, nonpolar c. Linear, polar d. Trigonal planar, nonpolar e. Linear, nonpolar

How much heat is required to raise the temperature of 73.5 g of water from its melting point to its boiling point?

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November 3, 2019