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Evaluate the effect on yourself and on the environment of switching a constantly used security light outside your home from an incandescent light bulb to a more efficient bulb.
water for the temperature of the trapped gas, will the calculated mass percent of metal in the sample be greater than, less than, or equal to real mass percent?
A silver plating cell operates with a steady current of 30.0 A for 20.0 minutes. What mass of silver is plated on the object of the cathode?
a cylinder measuring wide and high is filled with gas and the piston pushed down with a steady force. calculate the
Water (2330 g ) is heated until it just begins to boil. If the water absorbs 5.89×105 J of heat in the process, what was the initial temperature of the water?
A 45.5 g sample of copper at 99.8 degrees celsius is dropped into a beaker containing 152 g of water at 18.5 degrees celsius. What is the final temperature when thermal equilibrium is reached?
The central atom in a molecule has three regions of high electron-pair density. What type of hybrid orbitals are formed by the central atom
hydroquinone is an antioxidant that is also used as a photographic reducer and developer. the normal boiling point of
Strontium sulfate is also an insoluble sulfate. Knowing barium sulfate is insoluble, why is it not surprising that strontium sulfate is also insoluble
An ore was found to contain 32.0% Fe2O3 (ferric oxide) and no other iron. What mass of iron can be obtained from 64.0g of this ore
What is the mole fraction of Xe in the mixture?
Cl2+2KBr yields 2KCl+Br2- how many moles of potassium chloride are produced from 119 g of potassium bromide
consider a stone column 3.00 ft in diameter and 10.00 ft high. What is is mass in pounds if its density is 3.50 g/mL.
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