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The drinking water standard for dissolved Mn2+(aq) is .05 mg/L. Assuming dissolved Ca2+=10-3.00 M and CO2-3 = 10 -5.48 M compute Mn2+(aq) at equilibrium with this solid solution.
Magnesium metal burns in the presence of gaseous oxygen to produce solid magnesium oxide. If 12.5 moles of magnesium reacts with 5.25 moles of oxygen, how many moles of magnesium oxide can be produc
Liquid Hexane, C6H14, undergoes combustion. If 93.1 g of hexane combusts in the presence of excess oxygen, how many g of carbon dioxide will be produced?
If 0.701 g of aluminum reacts with an excess of HCl at 25 degrees C and 753 mm Hg, how many mL of hydrogen gas will be produced?
If 3.670g of nitrogen combines with 0.5275g of hydrogen to yield compound , how many grams of nitrogen would combine with 1.575g of hydrogen to make the same compound?
An equilibrium mixture contains N204 (P= .28 atm), and NO2 (P= 1.1 atm) at 350K. The volume of the container is doubled at constant temperature.
Complete hydrolysis of 50 mM methyl butyrate in an enzyme (ie esterase)-catalyzed reaction is carried out in a 50 mM KCl solution buffered by 0.15M Tris-Cl, pH 8.1. What will the pH be at the end o
The molar heat capacity of ethane is represented in the temperature range of 298K to 400K by the empirical expression Cp,m/(JK-1mol-1)=14.73+0.1272(T/K).
The heat capacity of liquid water is 4.18 J/g·°C and the heat of vaporization is 40.7 kJ/mol. How many kilojoules of heat must be provided to convert 1.00 g of liquid water at 67°C in
What is the pH of rainwater (containing no buffering other than from water itself) if the current concentration of carbon dioxide in the atmosphere is 390 ppm. Show calculations.
A 53 g sample of impure KClO3 (solubility = 7.1 g per 100 g H2O at 20 degrees C) is contaminated with 13 percent of KCl (solubility = 25.5 g per 100 g of H2O at 20 degrees C).
In general, ionization energies increase across a period from left to right. Explain why the second ionization energy of Cr is higher, not lower, than that of Mn.
Gold can be hammered into extremely thin sheets called gold leaf. If a 211-mg piece of gold (density = 19.32 g/cm3) is hammered into a sheet measuring 2.4 1.0 ft, what is the average thickness of t
A calcium supplement is being analyzed for Calcium by gravimetric analysis. The initial mass of the tablet used was 0.5068g. The sample was dissolved and the calcium was precipitated by oxalate as C
When HCl is added to CaCO3, carbon dioxide gas is released. You place 100g of CaCO3 into a small vessel which is connected to a larger, empty tank via a pump (size of tank is 1L).
Two moles of an ideals gas at 500k and 10 atm pressure are contained in an insulated piston-cylinder arrangement. The gas is allowed to expand reversibly and adiabatecally.
The fizz produced when an Alka-Seltzer® tablet is dissolved in water is due to the reaction between sodium bicarbonate (NaHCO3) and citric acid (H3C6H5O5):
Suppose your bedroom is 18 ft long, 15 ft wide, and the distance from floor to ceiling is 8ft, 6 in. You need to know the volume of the room in metric units for some scientific calculations.
The law of corresponding states implies that all real gases act similarly under the same reduced conditions. Thus a plot such as the one below can be used to determine the compressibility factor for
A commercial cylinder contains 6.91 m3 of O2 at 15.18 MPa and 21oC. The critical constants for O2 are Tc = -118.4 oC and Pc = 50.1 atm. Determine the reduced temperature and pressure for O2 under t
If you used the 9000 kilojoules you expend in energy in one day to heat 51000 g of water at 16 degrees C, what would be the rise in temperature? What wouldbe the new temperature of the water?
What is the volume of distilled water that is needed to be added to 8g of sodium hydroxide to make it 0.4 mol dm-3 sodium hydroxide solution?
How many moles of sodium benzoate must be added to 2.5 L of .15 M benzoic acid to form a buffer whose pH is 4.46? Assume the addition of sodium benzoate does not change the total volume of the solut
When an ionic compound such as sodium chloride (NaCl) is placed in water the component atoms of the NaCl crystal dissociate into individual sodium ions (Na+) and chloride ions (Cl-).
2Al(s)+3Cl2(g)>2AlCl3(s)You are given 30.0 g of aluminum and 35.0 g of chlorine gas.If you had excess chlorine, how many moles of of aluminum chloride could be produced from&n