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In a certain experiment, 137 g of Al2O3 are produced from 75.6 g of Al and 124 g of O2. What is the theoretical yield of Al2O3? What is the percent yield of Al2O3?
For each of the given combinations of reactants, decide which is limiting reactant. 1.25 moles of N2 and 3.65 moles of H2.
Sample of potassium hydrogen oxalate, KHC2O4, weighing 0.832 g, was dissolved in water and titrated with 25.80 mL of NaOH solution. Compute molarity of NaOH solution.
What would be molarity of the solution made by dissolving 4.50 g of KCl to make 250.0 mL solution? How many milliliters of 0.500 M solution prepared by dissolving 7.00 g of NaCl in water?
Dr. Brown has radioisotope source comprising 1.2 x 106 (also written as 1.2E+06) atoms of Plutonium-238 in 1985, how many atoms will remain in 352 years?
How could bomb have been detonated? What actions must the exposed person take during immediate aftermath of explosion?
Why the active on-duty firefighters likely to experience adverse health effects from inhaling 300 ppm of carbon monoxide faster than nonactive off-duty firefighters.
Given the following heat of formation values, compute heat of reaction for: If DG° (in kJ/mol) for: C2H6(g) = -32.9, O2(g) = 0, CO2(g) = -394.4, and H2O(l) = -237.2; compute DG° for reaction.
If lighter contains 2.5 mL of liquid butane (den = 0.8 g/cm3), how much potential energy does lighter contain according to combustion of butane.
Synthesis of ammonia via Haber reaction follows balanced equation: How much heat is created from synthesis of 7.38 metric tons (1 metric ton = 1000 kg) of ammonia?
How much energy is needed to warm 175 mL of water at 18.5°C to 85.0°C? Suppose specific heat of water to be 4.18 J/ g°C.
If 136.51 g Al rod (c = 0.900 J/g°C) is at 100.0°C and placed into 250.0 g of water at 21.8°C, find temperature of system (rod + water) at equilibrium assuming no losses to surroundings?
During the acid-base titration, 23.3 mL of HCl completely neutralized 19.5 mL of potassium hydroxide 0.315 M. Find concentration of hydrochloric acid.
To completely neutralize 20 mL of solution of HCl 0.1 M, 40 mL of a solution of NaOH should be added. Find the concentration (in M) of the NaOH solution?
During lab, you mix 2 solutions: a 100 ml solution containing 0.40 g of NaOH and 100 mL solution containing 0.73 g of HCl. Find the concentration of H+ ions in new solution?
For the ideal diatomic gas, which of the given properties will be in error if symmetry number in rotational partition function is not specified correctly?
How many liters of carbon dioxide can be produced? How many grams of Carbon dioxide could be made? Which molecule is limiting reactant?
Explain current global availability of rare earth elements. Analyze which nations are top producers and implications of rare earth element mining in the nations.
Write the effects histamines can have on body. Write the purpose of the antihistamine? Write at least 2 examples of antihistamine.
What health problems arise from regularly consuming excess dietary servings of carbohydrates? Write the chemical formula to show how carbohydrate can be thought of as "carbon plus water".
If connected such that one cell acts as the battery to power other as electrolytic cell, which two metals are plated, and find the total potential?
A current of 4.85 A is passed through Cu(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 7.60 g of copper?
The Sb3 (aq) is completely oxidized by 30.4 mL of a 0.120 M aqueous solution of KBrO3(aq). Unbalanced equation for reaction is: Compute amount of antimony in sample and its percentage in ore.
Electrode composed of copper in a 1.0 M copper(I) ion solution, connected by the salt bridge. Compute standard potential for this cell at 25 °C.
Write the names and chemical formulas for five bases of choice. Write chemical equation which shows release of hydroxide ions as each of the bases dissolves in water.