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Assume that you dissolve 10.2 g of a mixture of NaOH and Ba(OH)2 in 227.0 mL of water and titrate with 1.47M hydrochloric acid. The titration is complete when 107.8 mL of the acid has been added.
What is the mass (in grams) of NaOH in the mixture?
What is the mass (in grams) of Ba(OH)2 in the mixture?
A sample of aluminum metal absorbs 9.86J of heat,upon which the temperature of the sample increases from 23.2 C to 39.5 C. SInce the specific heat capacity of aluminum is 0.90 J/g-K, the mass of the sample is what in grams
Calculate the expected change in temperature for 1.7 g of NH NO dissolved in 50.0 2 cal mL of H O. Assume that the calorimeter absorbs no heat. (ie. C =0)(Remember to use dimensional analysis
A weather balloon containing 605 L of He is released near the equator at 1.01 atm and 305 K. It rises to a point where conditions are 0.489 atm
modern seawater is 0% while the average value of the polar ice cap is -45%. The ice cap holds 2wt% of the oceanic water. Calculate the delta 18 O value of an ice-free ocean.
Plutonium-239 has been used as a power source for heart pacemakers. What is the energy obtained from the following decay of 215mg of plutonium-239
find the molarity of an unknown NaOH solution if 0.5536 g of the KHP required 37.00 mL of a NaOH solution.
Ignoring activities find out the molar solubility of copper (I) aside (CuN3) in a solution with a pH of 12.04. Ksp (CuN3) = 4.9 × 10-9; Ka (HN3) = 2.2 × 10-5.
Ethanol is alcohol in alcoholic beverages. Many wines have ethanol contents of about 12% by volume. Although ethanol is not a natural nutrient, it is metabolized by the body and has a caloric value of 7 cal/gram
Problem- When 1318 J of heat energy is added to 40.4 g of ethanol, C2H6O, the temperature increases by 13.3 °C. Calculate the molar heat capacity of C2H6O.
Calculate the pH at 25°C of an aqueous solution that is 0.320 M in ethylamine and 0.140 M in ammonia (i.e. the solution contains both compounds). The pKa of the conjugate acid of ethylamine is 10.65 and the pKa of the conjugate acid of ammonia is ..
a bottle containing 315 g of cleaning solution is used for carpets. if the cleaning solution has a specific gravity of
Determine the entropy change for heating nitrogen gas from 25 oC to 100oC under the following conditions. Cp =29.1J·K?1 ·mol?1.
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