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Calculate a change in pH when 10 mL of 0.2 M LiOH is added to the buffer made by mixing 50mL of 0.1 M hydrobromous acid (HOBr) and 40 mL of 0.2 M of sodium hydrobromide (NaOBr), Ka(HOBr)=2.0E-9.
A manufacturer of bicycles has 4819 wheels, 2305 frames, and 2250 handlebars. How many wheels are left over? How many frames are left over? How many handlebars are left over? Which part limits the production of bicycles?
Sketch a cylinder with ten molecules of helium (He) gas. The cylinder has a movable piston. Label this sketch before. Make an after sketch to represent
what is the molecular geometry around each central atom: CH2CH2(double bond) C=? C=? Also, for CH3 O CH3 C-O-C C=? O=? C=.
Calculate What will be the volume of this gas sample at standard atmospheric pressure and
How many liters of liquid nitrogen are produced when 982.0 L of nitrogen gas is liquefied at 77.36K?
The half-cell is a chamber in the voltaic cell where one half-cell is the site of the oxidation reaction and the other half-cell is the site of the reduction reaction.
how many meters away is a cliff if an echo is heard one half second away? assume that sound ws traveled at 343 m/s on that day.
Standard Atmos. Pressure is 90.0 atm. What are the Partial Pressures of the Gases in mmHg?
Furoic acid, HC5H3O3, has a Ka value of 6.76 10-4 at 25°C. Calculate the pH at 25°C for each of the following.
How many mmoles of HCl reacted with the Na2CO3? c. Calculate the molarity of the HCl solution.
How many total atoms are there in each unit cell? (b) What is the volume of one unit cell in Å3? (c) Assuming that the atoms are spheres and the radius of each sphere is 1.64 Å
how many ml of concentrated sulfuric acid would be required to mae 1 L of 0.2N solution
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