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A copper refinery produces a copper ingot weighing 75 kg. the density of the copper is 8.94 g/cm^3. if the copper is drawn into a wire whose dimeter is 8.250mm,how many feet of copper can obtained f
It the acetylene was collected over water at 17 Celcius and .974 atm, how many milliliters of acetylene were produced.
Determine the number of moles of O2 produced by the decomposition of 639 g of NaClO3.
Which pair would be least diffcult to separate by fractional precipitation?
Consider a sample that is a mixture composed of biphenyl, benzoic acid, benzyl alcohol. Predict the relative Rf values for the three components in the .
one hundred grams of water is saturated with NH4CLat 50 degrees C. According to table G, if the temperature is lowered to 10 degrees , what is the total amount of NH4CL that will precipitate?
If an iron scoopula, instead of a plastic one, is used to add unknown metal to HCl solution, will it affect the calculated molar mass of the unknown metal?
How many grams of ethylene glycol (automobile antifreeze, {rm C_2H_6O_2}) dissolved in 3.30 {rm kg} of water is needed to lower the freezing point of water in an automobile radiator to 24.5^circ {rm
How does [HCl] Affect the Change in Temperature at Constant Volume in NaOH Solution? What kind of relationship? Linear or power or exponential etc.
A 4.80 g nugget of pure gold absorbed 298 J of heat. What was the final temperature of the gold if the initial temperature was 24.0°C? The specific heat of gold is 0.129 J/(g·°C).
A 2.40-g sample of a large biomolecule was dissolved in 12.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolec
If, in a certain experiment, over a specific time period, 0.0045 mol PH3 is consumed in a 1.9 L container each second of reaction, what are the rates of production of P4 and H2 in this experiment?
It takes 49.0 to raise the temperature of an 8.00 piece of unknown metal from 13.0 to 24.5. What is the specific heat for the metal?
0.01M HCl reacts with 3.18 g Na2CO3. Here 50 mL of HCl is required for the reaction. Calculate the volume of CO2 produced at 273 K and 1 atm.
What volume of oxygen, measured at 0.891atm and 18 degrees Celsius is needed to burn completely 4.18L of butane measured at 1.34atm and 38 degrees celsius?
The heat of formation of liquid aluminum, Al (l) is about 10.7 kJ/mol. The entropy of solid aluminum is 28 J/mol K and the entropy of liquid aluminum is 40 J/mol K. Based on these data, at what tem
When a 5.00 g sample of NaOH dissolves in 100.0 g of water in a "coffee cup" calorimeter, the temperature rises from 28.3 degrees C to 39.6 degrees C. Calculate the heat energy for the reaction of 5
What is the percent yield of a reaction in which 262 g phosphorus trichloride reacts with excess water to form 102 g HCl and aqueous phosphorus acid (H3PO3)?
A 2.89 g sample of solid calcium carbide (CaC2) reacted with water to produce acetylene gas (C2H2) and aqueous calcium hydroxide. If the acetylene was collected over water at 16.3 C and 0.973 atm, h
What is the mol fraction Na2SO4 in a solution which is 11.5% by weight Na2SO4 (molar mass Na2SO4 = 142.06 g/mol and H2O = 18.016 g/mol)?
Magnesium hydroxide is 54.87% oxygen by mass. How many grams of oxygen are in 175g of the compound? how many moles of oxygen is this.
A + B unstable helix (fast, k1 and k-1) Unstable helix stable double helix (slow, k2). write pre-equilbrium and steady-sate approximation.
A solution of ethanol (C2H5OH) in water is prepared by dissolving 73.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 235.0 mL of solution. What is the molarity of the ethanol in this
How Many moles of CO2 when 15.5 ml of a 3.00 M HCI reacts with excess CaCO3? The calcium carbonate in limestone reacts with HCl to procduce a calcium chloride solution and carbon dioxide.
A 25.0 cm3 portion of this solution required 0.10 mol of NaOH for neutralisation. What is the number of moles of SO2Cl2 dissolved in water?