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A 100.0-g sample of copper is heated from 10.0 degrees Celsius to 100.0 degrees Celsius.
Determine the number of calories needed. (The specific heat of copper is 0.0921 cal/g degrees Celsius.)
The same amount of heat is added to 100.0 g of Al at 10.0 degrees Celsius. (The specific heat of Al is 0.215 cal/g degrees Celsius. Which metal gets hotter, the copper or the aluminum?
What concentration of the salt NaC2H3O2 must be added to shift the equilibrium toward the reactants so that the [H3O+] concentration is reduced to pH = 5.5
What volume of a 0.1 M ClO- solution reacts stoichiometrically with a 10 mL solution of 0.2 M CrO2-? Use the reaction 2 CrO2- + 3 ClO- --> 2 CrO4-2 + 3 Cl- to assist in the calculation.
a piece of paper is spotted with a solution containing a mixture of 2 components, A and B. the chemical affinity of A for the stationary phase is less than that of B, and the chemical affinity of A for the mobile phase is greater than a of B.
How much energy (in Joules) is required to heat 10.99 g of water from 12.9 Celsius to 42.4 Celsius?
What is the concentration of the compound in a solution whose absorbance at 291 nm is A = 0.095 with a sample pathlength of 1.00 cm?
Question: Why is it that that cinnamic acid and urea have similar melting point ranges when pure, why do the impure mixtures have a lower melting point?
What percent error results from the assumption that the density of water is 1.000 g/ml at 20 C
A 500.0-g iron bar at 212 degrees Celsius is placed in 2.0-L if water at 24.0 degrees Celsius. Explain what will be the change in temperature of the water. Presume no heat is lost to the surroundings.
Why do sigma bonds have lower energy than pi bonds and are stronger if bond strength increases with bond energy?
A solution is prepared by dissolving 35.0 g of hemoglobin (Hb) in enough water to make up 1 L in volume. If the osmotic pressure of the solution is found to be 10.0 mmHg at 25 oC, calculate the molar mass of hemoglobin
In the electrolysis of KI, NaBr, pure elemental iodine potassium, and soduim cannot be isolated. Discuss by using equation I2(s) I^-(ag)>I3^-(ag) Iodine equation
The zinc in a 1.274g sample of foot powder was precipiated as ZnNH4PO4. Strong heating of the precipiate yielded 0.4089g Zn2P2O7. Calculate the mass percent of zinc in the sample of foot powder.
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