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How many moles (mol) are in 6.3 ml of a 0.25 M solution of NaOH? your answer must include units
how much of the excess reactant remains after the limiting reactant is completely comsumed?
How much limestone must be decomposed by heating to produce 250.0 grams of lime, CaO?assuming that the limestone contains 95.0% pure CaCO3.
A solution of ethanol (C2H5OH) in water is prepared by dissolving 57.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 255.0 mL of solution.
calculate the amount of heat transfered when 24.0 g of CH3OH decompose at constant pressure. delta H is 126.4 kJ
What is the pH at the point during a titration when 34 mL of 0.200 M HCl has been added to 33 mL of 0.0500 M NH3 solution? HCl is strong acid, Kb = 1.8 × 10-5 for NH3.
What is the volume of 295 mL of a sample of gas at 52.0°C and 710. mm Hg if the conditions are adjusted to STP
A 98 L sample of dry air cools from 138°C to -30.°C while the pressure is maintained at 2.85 atm. What is the final volume?
What conclusions can you draw concerning structures of species containing the same number of atoms and the same number of valence electrons?
A flexible container initially holds 2.0 moles of an ideal gas at 293K and 1.0 atm. The container is compressed isothermally
The hydrogen gas generated is collected over water at 25.0°C. The volume of the gas is 535 mL measured at 1.00 atm. Calculate the number of grams of sodium used in the reaction. (Vapor pressure of water at 25°C = 0.0313 atm.)
How much energy (in kilojoules) is required to convert 285 ml of diethyl ether at its boiling point from liquid to vapor if its density is 0.7138 ?
Hydrocyanic acid (HCN) is a weak acid with Ka = 4.9 x 10-10. The pH of a solution that contains equal numbers of moles of HCN and KCN is closest to
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