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30.0 mL of a 0.20 M solution of the weak base methylamine is titrated with 0.10 M HNO3. Calculate the pH after 20.0 mL and 60.0 mL acid addition (HNO3).
show how to solve each pH after each acid addition step-by-step.
A certain laser uses a gas mixture made up of 9.00 g HCL, 2.00g H2, and 165.0g Ne. What pressure is exerted by the mixture in a 75.0 L tank at 22 degree C?
Determine the number of ammonia molecules in 4.85g of ammonia (NA= 6.022 x 1023 mol-1).
What volume of ammonia at 25 °C and 1.5 atm pressure is needed to produce 500 g of urea?
How many liters of 13.5 molar HCl stock solution are needed to make 10.5 liters of a 1.8 molar HCl solution?
the volume of a gas is 93 mL when the temperature is 91C. If the temperature is reduced to 5C without changing the pressure, what is the new volume of the gas?
Consider the reaction 4 Fe(s) + 3 O2(g) → 2 Fe2O3(s). If 12.5 g of iron(III) oxide (rust) are produced from 8.74 g of iron, how much oxygen gas is needed for this reaction?
A 496-mL sample of a gas at 263 oC is cooled at constant pressure until its volume becomes 241 mL. What is the new temperature in oC?
A plot of ln[AV] versus t (s) gives a straight line with a slope of -0.32s^-1. What is the value of the rate constant (k) for this reaction?
Determine the expression for the rate of reaction with respect to each of the reactants and products
A 75.0 mL sample of acetic acid (HC2H3O2) is titrated to the equivalence point with 25.0 mL of 0.400 M NaOH. What is the molarity of the acetic acid solution?
A scuba diver with a lung capacity of 5.2 L inhales a lungful of air at a depth of 45 m and a pressure of 5.5 atm. If the diver were to ascend to the surface (where the pressure is 1.0 atm) while holding her breath.
suppose you have 10 ml of 0.10m sucrose solution. you add 90 ml of water to the solution.Do the number of sucrose change? Does the molarity change?
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