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Making ice cream involves surrounding the ice cream canister with a bath of salted ice water. To get the mix to freeze at 7.00ºC, how many grams of salt (NaCl; molar mass = 58) will you need to add to 3.5 kg of ice water bath? (Kf of water = 1.86ºC/m)
Determine the Ka of the ethylammonium ion (C2H5NH3+). [Kb of ethylamine (C2H5NH2) = 8.6 x10^-4]
200 million over a five year period. how many dollars is that paid per second?
A 125-g piece of metal is heated to 288 oC and dropped into 85.0 g of water at 26 oC. If the final temperature of the water and metal is 58.0 oC, what is the specific heat of the metal (J/goC)
The most accurate values of absorbance are obtained in the range of A = 0.3-2. Which of the following reasons account for lowered accuracy at higher or lower absorbancy values? (Check all that apply).
For the complete neutralization reactions between the following pairs of acid and bases, which pair is a soluble, strong base and a weak acid that react to form an insoluble salt?
What is the theoretical yield (in grams) of gold when 1.378 L of hydrogen gas (density = 0.0902 g/L) reacts with 20.14 g of gold(III) chloride in solution
the diffusion coefficient for nitrogen in the metal at 1150 C is 1x10^-11 m^2/s and the end is 3.5 kg/m^3, what is the nitrogen concentration at a position 2mm into the sheet away from higher concentration end?
125 mole of oxygen gas is added to carbon in a .25L container. The mixture equilibriates at 500K. Calculate the equilibrium concentration of carbon monoxide, knowing that K=.086 at 500K.
Draw a titration curve for both of these peptides. Be sure to label the axes properly, indicate the pKa values, the equivalence points and the buffering regions.
What is the heat of vaporization(kJ/mol) if it takes 3,452 J of heat to completely vaporize 2.68 moles of the liquid at its boiling point?
Equivalence point was 18.46 mL and my second equivalence point was 33.185 mL. How to find the percent weight of Na2CO3 in the unknown using these two values?
calculate mass of KHC8H4O4 (molar mass = 204.44 g/mol) that reacts with 15 ml of the NaOH solution
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