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Why would it not be useful to just use pure ethanol or pure ethylene glycol as an antifreeze since their normal freezing points are -114.1oC and -12oC respectively?
What was the composition of the mixture of Mg and Zn expressed as percent by mass? If the volume of acid used was 100 mL, what were the final molar concentrations of MgSO4 and ZnSO4?
Atoms of different elements also have different average masses, just like kernels and marbles. Use the mass values from a periodic table to answer the following questions.
You have available at your lab bench a 0.1 M solution of TRIS in its protonated form, 0.1 M solutions of HCL and NaOH, and ample distilled water. Describe the preparation of a 1 L solution of 0.2 M TRIS buffer, pH 7.8
A dancehall contains 173 men and 238 women. A certain "promenade" calls for the formation of groups, with each group consisting of one man with two women.
The hydrogen gas generated is collected over water at 20.0 C. The volume of the gas is 246 mL at 760 mm Hg. What mass of zinc was used
Heating potassium chlorate KClO3, yields oxygen gas and potassium chloride. What volume, in liters, of oxygen at 23 degrees C and 760 torr is produced by the decomposition of 4.42 g potassium chlorate
an ideal gas at 25 ºC and 5 bar are expanded to a final pressure of 1.00 bar. Assuming Cv=3/2 R, calculate deltaU, deltaH, q, w, and DS if the process is
A solution contains 2.2 × 10-3 M in Cu2+ and 0.33 M in LiCN. If the Kf for Cu(CN)42- is 1.0 × 1025, how much copper ion remains at equilibrium
Explain why the radii of atoms do not simply increase uniformly with increasing atomic number.
When ammonia is added to nickel ions in aqueous solution, the water molecules bound to the Ni2+ are replaced by ammonia molecules.
Draw the structure of the major organic product you would expect from the reaction of 1-bromopropane with NaI.
Calculate the frequency of radiation that can induce a transition between the highest occupied and lowest unoccupied levels.
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