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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.
CFCs were used in hair sprays, air conditioners, refrigerators, and plastic foams. Which properties of CFCs made them desirable for the uses?
Coal can be used to make hydrogen gas (a potential fuel) by given endothermic reaction. If the reaction mixture is at equilibrium, forecast effect (shift right, shift left, or no effect) of adding mo
HNO3 concentration by mass and density of 1.41 g/mL. How much of concentrated solution in milliliters must you use to make 2.5L of 0.500 M HNO3?
If 84.8 L of 02(g), measured at 35C and 632mm Hg, is permitted to react with 158.2 g of NO, determine limiting reagent. If 97.3 L of NO2 forms, measured at 35C and 632mm Hg, find the percent yield?
Explain the difference between "crystal lattice", arrangement of lattice points in space, and "crystal structure", arrangement of atoms in space.
Explain the importance of a limiting reactant? Explain how it is found and what it tells us about amount of product that can be formed.
The Ksp for magnesium fluoride is 3.7 x 10-8. Equilibrium is: MgF2(s) ? Mg2+ + 2F-. compute the solubility of magnesium fluoride in mol/L.
NO2 reacts with F2 to give NO2 according to the given overall reaction: Find equilibrium constant for this reaction given.
Describe how society depends on accuracy and precision of measurements for products sold by retail industry, like a gallon of gasoline, a bushel of corn, or liter of bottled water.
The chemical formula of hemoglobin is C2952H4664O832N812S8Fe4. Compute formula mass of hemoglobin. Calculate generated model of hemoglobin.