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Imagine that you have a 6.50 gas tank and a 2.00 gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 115 , to what pressure should you fill the acetylene tank to ensure that you run out of each gas at the same time? Assume ideal behavior for all gases.
Calculate the mass of formed from the unbalanced reaction? A solution is prepared by mixing 100.0 mL of 0.45 M NaCl, 100 mL of 0.082M, and enough to bring the total volume to 400.0 mL
The mass of a cube of iron is 439 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
Calculate the amounts of Na2HPO4 and NaH2PO4 (in grams) needed to prepare 200 mL of a buffer with pH = 8.25 so that the sum of concentrations
A solution is prepared by mixing 63.0 mL of 5.00 M HCl and 20.0 mL of 8.00 M HNO3. Water is then added until the final volume is 1.00 L. Calculate [H+], [OH -], and the pH for this solution.
A sample of gas confined in a 2.0L container at 930 Torr and 25oC was heated to 45oC. What was the final pressure?
A 54.7-g sample of aluminum at 95.0 oC is dropped into 35.0 g of water at 40.0 oC. What is the final temperature of the mixture? (specific heat capacity of aluminum = 0.89 J/goC; specific heat capacity of water = 4.184 J/g degreesC)
Will the temperature of the water be greater than or less than 20 C when thermal equilibrium is reached? Calculate the final temperature
The total pressure in a flask containing air and ethanol at 257C is 878 mm Hg. The pressure of the air in the flask at 257C is 762 mm Hg. If the flask is immersed in a water bath at 350C
A 248 gas sample has a mass of 0.433 g at a pressure of 745 mm Hg and a temperature of 28 C. What is the molar mass of the gas?
Calculate the change in pH when 7.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
A mixture of 4.50 g of He, 12.0 g of Ne, and 29.0 g of Kr is placed in a cylinder at STP. Calculate the partial pressure of each gas.
Why do aldehydes undergo nucleophilic addition faster than ketones? Explain based upon the transition state (applying Hammond's principle) and electronic and steric actors.
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