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You are asked to determine if phenol would be better to use in barbeques than propane. To test this, you burn 120 mg of naphthalene in a calorimeter and the temperature of the calorimeter rises by 3.05 oC. Determine the calorimeter heat capacity. You now burn 100 mg of phenol using the same conditions and the temperature rises by 2.05 oC. Using this data, make a comparison of phenol and propane and discuss which might be better for use in barbies. Assume that phenol and propane are the same price per unit of mass.
water's heat of fusion is 80 cal/g and is specific heat is 1.0 cal/g degree celcius. Some velmobile set have been designed to hold ice packs inside their cushions.
If you had excess aluminum, how many moles of aluminum chloride could be produced from 28.0 grams of chlorine gas
solution of an unknown monoprotic acid with 23.68 mL of .9721 M NaOH results in a solution pH of 3.74 Calculate the Ka of the acid.
Problem- 1) Determine the identity of the following excited element. Explain 1s^22s^22p^23d^1 2) Write the ground state electron configuration and the corresponding orbital diagram.
which is limiting reagent when 42.0g of propane , C3H8, is burned with 115g of oxygen ? how many liters gaseous water are produced at STP
three solutions are mixed to form a single solution. one contains 0.2 mol pbc2h3o22 the second contains 0.1 mol na2s
Problem- A constant electric current deposits 0.365 g of silver metal in 12960 seconds from a solution of silver nitrate. What is the current. What is the half reaction for the deposition of silver. Molar mass of Ag is 107.9
If the water in your house has 1000.0 mg/L of calcium carbonate dissolved in it, How many grams of sodium oxalate could you mix with 100.0 mL of that water before a precipitate would form.
calculate the quantity in grams of formic acid and sodium formate necessary to make 500 mL of a buffer that has a formic acid concentration of .75 M and a sodium formate concentration of .75 M
Problem- We mix 50.00 mL of 0.050 M HNO3 and 25 mL of 0.10 M NaCH3COO. What is the pH of the resulting solution? Ka (CH3COOh)=1.8x10-5
A star is estimated to have a mass of 2x10 to 36 kg. Assuming it to be a sphere of average radius 7.0x 10 to 5 km, calculate the average density of the star in units of grams per cubic centimeter.
if the empty cylinder has the mass of 94.2g and the cylinder with water has the mass of 138.7 what is the mass of water
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