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What is the freezing point of a solution prepared by dissolving 11.3 g of Ca(NO3)2 in 115 g of water? (The molal freezing point depression constant of water is 1.86 degreesC/m) A) -3.34 C B) -1.11 C C) 3.34 C D) 1.11 C E) 0.00 C
A set of data gave an average unpopped kernel of 0.12 grams. How many kernels are in a pound of unpopped corn?
when a metal was exposed to light at a frequency of 4.63*10^15 Hz, electrons were emitted with a kinetic energy of 3.10*10^-19 J.
How many grams of H2 are needed to react with 3.10 g N2?
If a raindrop weighs 57 mg on average and 5.1 X 10^5 raindrops fall on a lawn every minute, what mass of rain falls (in kg) on the lawn in 1.5 hours?
When 50.0 mL of water containing 0.50 mol HCl at 22.5°C is mixed with 50.0mL of water containing 0.50 mol NaOH at 22.5°C in a calorimeter, the temperature of the solution increases.
Draw a three-dimensional structure of CH3CL. Include all non-bonding pairs in your drawing. Shoe the direction of the molecular dipole and indicate bond angles.
provide the structures for the two products indicate two features of the spectrum (ie hydrogen ratio, peaks, classification of peak (singlet doublet etc) that would justify assigning the structure.
A volume of 80.0 mL of a 0.520 it M HNO_3 solution is titrated with 0.590 it M KOH. Calculate the volume of KOH required to reach the equivalence point?
If B gas at 0.221 bar is injected into a container at 665 °C that contains excess A, what are the partial pressures of all gases present at equilibrium?
Iron has a density of 7.87 g/cm3. What mass of iron would be required to cover a football playing surface of 120 yds × 60 yds to a depth of 10 mm? (1 inch = 2.54 cm; 1 lb = 453.6 g)
It takes 55.0 J to raise the temperature of an 10.3 g piece of unknown metal from 13.0C to 24.7 C. What is the specific heat for the metal?
what are the structural formulas for the following compound : 6-bromo-2-methyl-3-heptyne
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