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What mass of ethylene glycol must be added to 1455 g of water to raise the boiling point to 104.7 degree Celsius ?
If the steel rods have a diameter of 60 mm and a length of 2.5 m, determine The time required to cool a steel rod from 900oC to 90oC in the water bath.
A solution composed of 50% ethanol (EtOH), 10% methanol (MeOH), and 40% water (H2O) is fed at the rate of 100 kg/hr into a separator that produces one stream at the rate of 60 kg/hr with he composi
How many grams of carbon dioxide can form when a mixture of 6.00 g ethylene (C2H4) and 2.50 g of oxygen is ignited, assuming complete combustion to form carbon dioxide and water?
The flask is removed from the bath and cooled, dried and reweighed. The new mass of the flask and condensed vapor is 115.23 g. Which of the following compounds could the liquid be?
A 105.5 mg sample of a white substance is suspected to be cocaine, C17H21NO4. The substance formed 279.3 mg of CO2 and 66.46 mg H2O on combustion. The compound contains 4.680% N by mass. Is the whit
Consider the combustion of {rm{H}}_2 (g):2{rm{H}}_2 (g) + {rm{O}}_2 (g) rightarrow 2{rm{H}}_2 {rm{O}}(g). If hydrogen is burning at the rate of 0.61 {rm mol/s}, what is the rate of consumption of o
Metallic aluminum reacts with MnO_2 at elevated temperatures to form manganese metal and aluminum oxide. A mixture of the two reactants is 67.2% mole percent Al. Find the theoretical yield (in grams
Suppose the pH of the water is 3.67 and that the concentration of iron(II) in the water is 6.93x 10-5 M, what is the potential of the corrosion reaction under the above conditions at 298 K?
A box contains a mixture of small copper spheres and small lead spheres. The total volume of both metals is measured by the displacement of water to be 432 cm^3 and the total mass is 4.32 kg. What p
In a reaction between pure acetic acid and sodium bicarbonate, 26.6 grams of sodium bicarbonate was added to 12.0 mL of acetic acid. Which reactant is the limiting reactant in this reaction?
At what temperature in degrees Celsius will your food cook in this pressure cooker set on "high"? Express your answer numerically in degrees Celsius.
cyclopropane, C3H6, is converted to its isomer propylene, CH2=CHCH3, when heated. the rate law is first order in cyclopropane, and the rate constant is 6.0x10-4/sec at 500C. if the initial concentra
Citric acid (H3C6H5O7) is a product of the fermentation of sucrose (C12H22O11) in air. Determine the mass of citric acid produced when 4.60 mol C12H22O11 is used.
An analytical chemist has determined by measurements that there are moles of magnesium in a sample of talc. How many moles of silicon are in the sample?
The molar heat capacities of iron and gold are 25.19 J/(mol * degrees C) and 25.41 J/(mol*degrees C) respectively. What is the final temperature of the water and the metals?
If 37.0 grams of hydrogen sulfide gas (H2S; MM = 34.08 g/mol) react with 37.1 grams of oxygen gas (O2, MM = 32.00 g/mol), what is the mass of sulfur dioxide (SO2, MM = 64.06 g/mol) gas produced?
If 120.9 mL of water is shaken with a gas at 0.860 atm, it will dissolve 0.00286 g of the gas. Estimate the Henry's law constant for the gas in water in units of g L-1 atm-1.
If 488 g SO2 escaped into the atmosphere and all the escaped SO2 were converted to H2SO4. How many grams of H2SO4 would be produced in the atmosphere?
The element boron has two naturally occurring isotopes with masses of 10.0129 amu and 11.0093 amu. What is the percent abundance of the second isotope?
A patient weighs 146 pounds and is to receive a drug at a dosage of 45.0 mg per kg of body weight. The drug is supplied as a solution that contains 25.0 mg of drug per mL of solution. How many mL of
A solution of sodium formate having the same molarity. How many mililiters of the Nafor solution should she add to 25 ml of the Hfor solution to make the buffer?
If a piece of aluminum with mass 3.90 g and a temperature of 99.3 degrees celcius is dropped into 10.0 cm cubed of water at 22.6 degrees celcius, what will be the final temperature of the system?
A solution of ethanol (C2H5OH) in water is prepared by dissolving 65.8 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this
Three solutions are mixed together to form a single solution. One contains 0.2 mol Pb(CH3COO)2, the second contains 0.1 mol Na2S, and the third contains 0.1 mol CaCl2. Write the net ionic equations