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Explain what mass of NaOh is required to precipitate the Cd+2 ions from 40.0Ml of 0.460M Cd(NO3)2 solution?
a balloon is inflated with 0.2492 grams of helium to a pressure of 1.26 atm. if the desired volume of the balloon is
at 25degc k 0.090 for the following reaction.h2og cl2og 2 hoclgcalculate the concentrations of all species at
Calculate the pH of a solution formed by mixing 65 mL of 0.30 M NaHCO3 with 75 mL of 0.30 M Na2CO3
The Ka for boric acid is 7.3 x 10-10. What is the pKa of boric acid?
what is the mol fraction na2so4 in a solution which is 11.5 by weight na2so4 molar mass na2so4 142.06 gmol and h2o
Identify compound Z in the following sequence. (CH3)2CHCH2CN ---HCl, H2O, heat---> compound X ---1. LiAlH4, diethylether, 2. H20 ---> compound Y --- PCC, CH2Cl2 ------> compound Z 1. (CH3)2CHCH2COH (the O is double bonded to the C)
If a student weighed out a 500. mg tablet of vitamin C, measured to the nearest 0.001g and recovered 0.254g of ascorbic acid. What is the percent mass of vitamin C in the tablet
a cube of solid benzene c6h6 at its melting point and weighing 8.37 g is placed in 19.3 g of water at 38.8 degc. given
What does the angular momentum quantum number determine. Check all that apply. A.) the overall size of an orbital B.) the energy of the electron on the outer shell
1. In a Lineweaver-Burk plot of 1/v versus 1/[S} what are the units for the slope. 2. In a Lineweaver-Burk plot of 1/v versus 1/[S} what are the units for the y intercept
The freezing point of ethanol (C2H5OH) is -114.6 degrees C and the molal freezing point depression constant for ethanol is 2.00 degrees C kg mol-1. What is the freezing point (in C) of a solution prepared by dissolving 57 g of glycerin (C3H8O3) in..
A reverse osmosis unit is used to obtain drinkable water from a source that contains 0.570 g NaCl per liter. What is the minimum pressure (in torr) that must be applied across the semipermeable membrane to obtain water.
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