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Determine the of a solution that is 1.85% by mass. Assume that the solution has density of 1.01
yellow-gold is an alloy that is 75.00% gold,16.00% silver and 9.00% copper (by mass). calculate the cost of the gold in a cube of the alloy 1.00 ft on a side.
The standard cell potential for the reaction below is +0.63 V. The cell potential for this reaction is __________ V when Zn2+ = 3.5M and Pb2+ = 2.0x10^-4 M. Pb2+ (aq) + Zn (s) --> Zn2+ (aq) + Pb(s)
a student dissolves two moles of mgno32 into a beaker of water. how many nitrate ions are present in the
In a concentration cell established using 0.150 M Ag+ solution and a saturated AgCN solution, the measured Ecell is 0.8520 V. Calculate the molarity of the Ag+ ion in the saturated solution.
The solubility of radium oxalate RaC2O4 in warm water is 0.0174 mols/Liter. Calculate Ksp for this compound. Radium is a 2nd column element somewhere below calcium.
To identify a diatomic gas (X2), a researcher carried out the following experiement. She weighed an empty 4.2L bulb, then filled it with the gas at 1.30atm and 23.0C and weighted it again. The difference in mass was 6.3 g. Identify the gas
When aluminum is placed in a concentrated hydrochloric acid, hydrogen gas is produced. 2Al (s) + 6HCl (aq) ------> 2AlCl3 (aq) + 3H2 (g) What Volume of H2 (g) is produced when 4.10 g of Al (s) reacts at STP
List the similarities and differences between the classical - and - quantum-mechanical equations of motion. How does the latter account for the quantization of energy and wave-particle duality
After carrying out the reaction, why does a precipitate (solid) form when you pour the reaction mixture on ice
Iodine-131 is used in the form of sodium iodide to treat thyroid cancer. The isotope has a 1/2 life of 8.05 days
When Mg-EDTA is added to a sample to compensate for a lack of Mg^+2, why is no blank correction necessary
Kr (g) in a 18.5 L cylinder exerts a pressure of 11.2 atm at 28.2 °C. How many grams of gas are present
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