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0.020 mole of Ca(OH)2 is added into 400 mL of buffer solution with 0.40 M of NH3 and 0.60 M of NH4Cl. Calculate the pH of the solution. Kb=1.8*10^-5.
determine the molarity of a solution formed by dissolving 15.79 grams of cacl2 calcium chloride in 200.grams of h2o
what is the molarity of a saturated solution of AgOH with a Ksp = 2.0 x 10^ -8
A graduated cylinder contains 148 mL of water. A 11.0 g piece of iron (density = 7.86 {g/cm^3}) and a 19.0 g piece of lead are added. What is the new water level in the cylinder? Density of the lead is 11.3g/ml
Starting with 1 liter of 2.0 M CH3COOH (acetic acid) we wish to make a buffer solution of pH=4.00. Consider the following to make the buffer: One way would be to add sodium acetate. How many moles must be added (assume no volume change)
A nonmetal oxide dissolves in water to give an acid. Show this for gaseous carbon dioxide by writing a balanced chemical equation. (b) A metal oxide dissolves in water to give a base. Show this for solid potassium oxide by writing a balanced chemi..
celsius absorbs 281kJ of heat from a mountain climber's stove at an elevation where the boiling point of water is 89 degrees celsius, how many kJ are required to boil the water?
when a metal at a higher temperature is transferred to water at a lower temperature heat is inevitably lost to the
what volume of 0.240 m cacl2 must be added to 335 ml of 0.189 m kcl to produce a solution with a concentration of 0.245
Which one of the following substrates is found in both gluconeogenesis and the citric acid cycle? Answer A. isocitrate B. pyruvate C. phosphoenolpyruvate D. oxaloacetate
Examining the two components in your mixture below, which component would you expect to come off the column first? Which component will come off the chromatotron first
What does the volume correction constant (b) in the van der Waals equation represent? Why is b for helium small (b = 0.0238 L /?mol) compared to b for decane (C10H22, b = 0.3043).
Geologist can estimate the age of rocks by their uranium-238 content. The uranium is incorporated in the rock as it hardens and then decays with first-order kinetics and a half-life
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