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flask of nitrogen is collected over water at a total pressure 765.0 mm Hg. If the partial pressure of the water vapor is 25.0 mm Hg, what is the pressure exerted by the nitrogen?
Calculate the concentrations of all species in a 1.73 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10-2 and Ka2 = 6.3× 10-8.
What is the percent yield of CaO in the reaction CaCO3 yield CaO + CO2 if 5.33 g of CaO are obtained when 10.0 g of CaCO3 are used?
What mass of Fe(OH)3 would be produced by reacting 75.0mL of a 0.0810M Fe(NO3)3 solution with 125 mL of a .150 M NaOH solution.
a sample of a gas has a mass og 0.311g. its volume is 0.225 L at a temperature of 55 degrees C and a pressure of 886 mmHg. find its molar mass
What volume of 0.150 mol /L Ba(OH)2 is needed to neutralise 476 mL of 0.178 mol/L HCl?
NaOH to achieve a phenolphthalein end point. Express the acidity of the wine in terms of grams of tartaric acid (H2C4H4O6, fw 150.09) per 100 mL of wine.
consider a major oil spill in a lake ( a prototype situation related to Alaska Oil Spill few years ago and many subsequent spills) Amount of oil spilled is 2.9 mega gram (Mg).
Calculate the empirical formula and then determine the molecular formula of this compound using the given molar mass. b) Draw three lewis structures for molecule that satisfies the octet rule for each atom.
The % mass composition of 0.1458g sample of a compound was measured by burning the compound in an excess of oxygen.
Which metal hydroxide will precipate first? Why? Ksp Ni(OH)2 = 6.0x10-16 Ksp Ce(OH)3 = 6.0x10-22 Ksp Cu(OH)2 = 4.8x10-20
1) Why is it important to clean up any spills immediately, wash hands frequently, and wash glassware thoroughly when working with crystal violet solutions?
The temperature inside my refrigerator is about 40 Celsius. If I place a balloon in my fridge that initially has a temperature of 220 C and a volume of 0.59 liters, what will be the volume of the balloon when it is fully cooled by my refrigerator?
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