Calculate heat released by metal
An iron bar of mass 869 - g cools from 90 oC to 5 oC > Calculate the heat released (in kilojoules) by the metal. ( specific heat = 0.44 J/(g. c)
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How many kilojoules are needed to raise the temperature of 325 g of water from 15.0C to 77.0C? How many kilojoules are needed to raise the temperature of 325 g of water from 15.5C to 77.5C?
Based on mole ratios. A sample is 59.53% C, 5.38%H, 10.68%N, and 24.40%O what is its empirical formula. A 0.2000 gram sample of a compound (vitamin C) composed of only C, H, and O is burned completely with excess O2 . 0.2998 g of CO2 and 0.0819 g of
A piece of copper wire is 25 feet long and has a diameter of 2.0mm. Copper has a density of 8.92g/cm^3. (a) how many mols of copper are there in this wire?
What percent of each reactant will remain at equilibrium? What is the free energy change for the reaction after 10% of the reactants have been converted to products?
A 4.22g sample of CuS was added to excess HCl, and the resulting H2S was collected over water. What volume of H2S was collected at 32 degrees celsius when the atmospheric pressure was 749 torr (1atm=760torr)? The vapor pressure of water at this t
The molecular weight of citric acid is 0.030M. How many grams of citric acid (molecular weight = 192) are present in a 120ml serving assuming its density is the same as that of water?
Methyl alcohol (CH3OH) is made by reacting carbon monoxide with H2. Starting with 2.5 g of H2 and 30 L of CO, what mass of methyl alcohol could be produced at STP? which is the limiting reactant?
Draw three simple molecules that illustrate the geometry of each states.Define" reduction" with reference to organic reactions.
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