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A solution of sodium chloride in water has a vapor pressure of 20.3 torr at 25°C. What is the mole fraction of NaCl in this solution?
The mercury in a 0.7325 gram unknown sample was precipitated with excess par aperiodic acid, H6IO5, according to the following balanced chemical equation:
Determine the mass of H 2 O in the flask and it's the true volume at 20° C?(at 20°C the Density g/mL=0.9982071,20°C the volume of 1g of water (mL) corrected for buoyancy is 1.0029 )
From the same container under the same conditions--same temperature and initial pressure, it takes 385 s for 7.00 L of O2 gas to effuse. Calculate the molar mass (in grams/mol) of the unknown gas.
given the balanced equation representing a reacction: 2C2H6+7O2=4CO2+6H2O determine the total number of moles of oxygen that react completely with 8.0 moles of C2H6
A 25.0 mL sample of a solution of the weak base aniline, C6H5NH2, requires 25.67 mL of 0.175 M HCl to reach the equivalence point. (Kb for aniline = 4.0 x 10-10)
how many grams of methanol (CH3OH) is required to prepare a 0.112 m solution in 440 g of water? answer in units of g.
What is the change in pH after addition of 10.0 mL of 1.0 sodium hydroxide to 90.0 mL of a 1.0 M NH3/1.0 M NH4+ buffer? [ Kb for ammonia is 1.8 x 10^-5]?
What is the concentration of the AgNO3 solution. How many grams of AgNO3 are precipitated.
2NOCl(g) = 2NO + Cl2 When 3.00 mol of NOCL is heated to a given temp. in a 2.00 L container, 1.70 fol NOCL remain at equilibrium. a.) Calculate the equilibrium concentration of each substance in the reaction
According to Avogadro's law, how many liters of hydrogen are required to react with 1.9L of oxygen at STP.
How much heat is absorbed when 45.00 g of C(s) reacts in the pressence of excess SO2(g) to produce CS2(l) and CO(g) according to the following chemical equation?
When a solution of A is mixed with one containing B- ions, the color changes from green to red. Which species is oxidized?
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