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How many mL of H2 (g) measured at STP are produced at a platinum cathode in the electrolysis of H2SO4 (aq) by 4.35 A of electric current in 6.00 min? a. 112 b. 16.3 c. 364 d. 182 e. 91.0
Standard Atmos. Pressure is 90.0 atm. What are the Partial Pressures of the Gases in mmHg?
A 5.645-g sample of a mixture of Fe and Al is treated with excess HCl(aq). If 0.2122 moles of H2 are obtained, then what is the percentage by mass of Fe in the original mixture? Give your answer accurate to three significant figures.
A compound is constituted by mass of 52.1% carbon and 13.1% hydrogen, the rest being oxygen. Given that a volume of 5.33 L of this gas has a mass of 11.5 g at 13 °C and 110 kPa, find the molecular formula for this compound.
Write the balanced chemical equation that represents the addition of CL2 to CH3CH=CH2.
consider 25.0 g of water at 21.7degc that are mixed with 25.0 g of water at 43.3degc in a foam cup calorimeter. the
dinitrogen monoxide gas and 3.41g of carbon dioxide gas. You can assume both gases behave as ideal gases under these conditions. Calculate the mole fraction of each gas. Be sure each of your answer entries has the correct number of significant digits..
If an air bubble was initially in the buret tip but was dispensed during the back titration of the unreacted HCl. As a result of this technique error
what is the ph of the 0.20 M NH3/0.20 M NH4Cl buffer after the addition of 10.0 ml of 0.10M HCl to 65.0 ml of the buffer.
there are 2.2 mg of lead in exactly 500 g of a water sample. what would the concentration of lead be in parts per
what mass of stomach acid will neturalise an antacid tablet containing 0.1g of magnesium hydrogen carbonate
which molecular species listed would be necessary for the formation of pentanol from the reaction of 4-methyl-2-pentene with sulfuric acid and water as the solvent
A compound used to treat manic depressives has the formula Li2CO3. Which of the following is the correct name for this compound
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