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What is the [H3O+] for a buffer solution that is 0.250 M in acid and 0.600 M in the corresponding salt if the weak acid Ka = 5.80 x 10-7? Use as example the following equation of a conjugate acid-base pair
HA(aq) + H2O (l) <-> H3O+ (aq) + A- (aq)
Determine the pH of each solution a solution that is 0.028 M in HClO4 and 0.030 M in HCl a solution that is 1.06% HCl by mass
2C4H10 + 13O2 → 8CO2 + 10H2O The equation shows the combustion of butane (C4H10). How many moles of water can be produced by 12.5 moles of C4H10 with excess oxygen.
Ethylene is supplied by a 60.9-L gas cylinder initially at 2200.0 psig and 25.0°C. Once leaving the cylinder, a regulator reduces the pressure to 15.0 psig, and a valve allows 1.000 mL/s of ethylene at 25.0°C to flow into the reactor
How many milliliters of O2 gas at 25 C and 1.00 atm pressure are obtained by the thermal decomposition of 0.470g of KMnO4? The balanced equation for the reaction is:
How many hours are required for 0.100 mol of electrons to flow through a circuit if the current is 1.00 A
Find the velocity of an electron emitted by a metal whose threshold frequency is 2.47 x 10^14 s^-1 when it is exposed to visible light of wavelength 5.02 x 10^-7 m
A 4.10 g nugget of pure gold absorbed 292 J of heat. The initial temperature was 28.0°C. What was the final temperature.
Consider the reaction CaCN2 + 3H2O ->CaCO3 + 2NH3 . How much NH3 is produced if 187 g of CaCO3 are produced?
what is the total volume occupied by the metal and the water in the graduated cylinder? 2.How could the density of a substance that was soluble in water, be determined?
Assume ^35^Cl_2_ is a harmonic oscillator( it is slightly anharmonic). If K=329 N/m compute the zero-point energy for this molecule. ^35^Cl= 34.9688g/mol.
what is the presentage compostition of both of the components, which is the limiting reagent (if there is) and what is the theoretical yeild of each of them.
Working with ideal gas law, The pressure of a sample of gas at a constant temperature of 25 degrees C is increased from 1.0atm to 1.3atm
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