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Manganese IV oxide is an even stronger oxidizing agent than Mn(OH)3. it oxidizes zinc in the dry cell or flashlight baterry found in very home. Such a baterry has a cell voltage of 1.5 V. Calculate the electrical work done buy a dry cell in 1.00 H if it produces a steady current of 0.70 A at 1.5 V. Answer expressed in jeules.
Determine the boiling point of a solution of 22.5 g of fructose, C6H12O6 , in 294 g of phenol.
It takes 55.0 J to raise the temperature of an 11.7 g piece of unknown metal from 13.0 C to 25.0C. What is the specific heat for the metal?
Calculate the mass of propylene glycolC3H8O2 that must be added to 0.320kg of water to reduce the vapor pressure by 2.88torr at 40C Pressure H2O 40C 55.3torr
What is the percent by mass of sulfur trioxide (SO3) if oleum is expressed as 3H2SO4 . 5SO3?
A 486 mL sample of water was cooled from 50.0°C to 10.0°C. Assuming a specific heat of 4.184 J/K g and a density of 1.00 g/mL, find the amount of heat transferred from the water to the surroundings.
A mixture of table salt and ice is used to chill the contents of hand-operated ice-cream makers. What is the melting point of mixture of 2.00 lb of NaCl and 12.00 lbs of ice if exactly half of the ice melts?
calculate the pH of 50 ml of .15 M HCHO2 with 75 mL of .13 M NaCHO2
The best means of personal protection from radiation for emergency responders is the implementation of three basic principles: time, distance and shielding. Please show your work when answering the following questions.
How much heat is absorbed by 15.5g of water when its temperature is increased 20.0C to 50.0C?The specific heat of water is 4.184J/(g.C)
A saturated solution of unknown metal hydroxide M(OH)2 has a measured pH of 8.91. Determine the value of Ksp for the compound.
Determine the molarity of this solution. (b) If I use 1 cup of vinegar (236.588 mL) to help create a cleaning solution for my windows, how many molecules of acetic acid is this?
In a second experiment, I(electric current) broke down a sample of H 2 O into 1.45 grams of hydrogen and 11.51 grams oxygen. Are these results reliable with the law of exact extent?
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