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The rate of a chemical reaction can sometimes be determined by measuring the change in mass of the reaction flask and its contents with time. For which of the following reactions would this technique be most successful and why? A. magnesium oxide and dilute sulfuric acid B. aqueous sodium chloride and aqueous silver nitrate C. copper (II) carbonate and dilute hydrochloric acid D. zinc and aqueous copper (II) sulfate
if you had excess chlorine how many moles of of aluminum chloride could be produced from 17 grams of aluminum
How many grams of precipitate will form from 100mL solution that is both 0.90 M in Na2S and 0.20 M in PbCl2?
The concentration of Mg2+ in a sample of water is 262 mmol/L At what pH will 99% of the Mg2+ be precipitated as Mg(OH)2? Ksp = 8.9 x 10-12
Ethylene gycol has a density of 1.11g/mL. What is the volume of 30.0 g of ethylene glycol?
How many grams of methane gas (CH4) need to be combusted to produce 18.2 L water vapor at 1.2 atm and 275 K? CH4 (g) + 2 O2 (g)-> CO2 (g) + 2 H2O (g)
Lakes that have been acidified by acid rain can be neutralized by liming, the addition of limestone (CaCO3 ). How much limestone in kilograms is required to completely neutralize a 3.8 x109 lake with a pH of 5.5.
A 29.0-g sample of water at 270. K is mixed with 48.0 g water at 340. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
Which corresponds to approximately 2.65 * 104 mol of electrons at the voltage of a fuel cell and calculate how much heat energy is absorbed?
How much ammonium hydroxide is needed to react completely with 75.0g of copper (2) nitrate in a double replacement reaction.
When 0.549 moles of a certain gas fill a balloon the volume is 75 mL. If enough of the same gas is added to the balloon until 1.44 moles of gas are present, what is the new volume of the balloon?
A helium balloon at a high altitude has 2.1 × 104 L of helium at 0.40 atm and -13°C. If the balloon descends to an altitude in which the atmospheric pressure is 1.00 atm and the temperature is 20°C.
If 1.56g of a gas has a volume of 1.00 L at .984 atm and 50 degrees Celcius, what is the molar mass of the compound
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