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What is the safest metal to use with a number of cleaning agents; even just H.2 0.; The heavier it is the better the resolve. A substance other then a metal with a comparable comparison would be nice. preferably something non corrosive.
After careful consideration, the student decides to se the method of recrystallization. What should be the characteristics for a good solvent that the student should consider? Identify them by circling those that apply:
a solution is made by dissolving 1.00 moles of sodium chloride nacl in 155 grams of water. if the molal boiling point
Determine what mass of titanium displaces 65.6mL of H 2 O at the temperature 25 degree Celsius if the density of titanium metal is 4.51 g/cm 3 at the temperature of 25 ° C .?
The rate constant k for a first order reaction is 1.36 * 10 -3 s -1 at 90 degrees Celcius and the activation energy is 78.4 kJ/mol. What is the rate constant for this reaction at 50 degrees Celcius?
jacob couldnt find the 6 m h2so4 so instead substituted the 6 m hno3 that was available. what change was most likely
From the same container under the same conditions--same temperature and initial pressure, it takes 40 s for 1.00 L of O2 gas to effuse. Calculate the molar mass (in grams/mol) of the unknown gas.
The high-field:low-field integration ration is 2:1. Deduce the structure of the organic hald and explain the NMR signals. I'm thinking it's 1,1-dichloropropane.
A 25-g sample of an alloy at 98 C is placed in 50. g water at 17 C: If the final temperature reached by the alloy sample and water is 27 C, what is the specific heat (cal/gC) of the alloy?
A 200 MHz proton NMR instrument is used to obtain a ^13C spectrum. calculate the energy difference that will develop between teh two spin states of the ^13C nuclei.
Exposure to high doses of microwaves can cause damage. Estimate how many photons, with wavelength = 12 cm, must be absorbed to raise the temperature of your eye by 3 degrees celcius
If a sample of Al2(SO4)3 is found to contain 863 mol of Al3+ ions how many moles of Al2(SO4)3 formula units are present?
One beaker contains 10.0 mL of acetic acid/sodium acetate buffer at maximum buffer capacity and another contains 10.0 mL of pure water. Calculate the hydronium ion concentration and the pH after the addition of 0.25 mL of .10 M HCl to each one.
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