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Draw a dot and cross diagram to show the bonding in CH2F2. Your diagram only needs to show the outer shell electrons.
How would the Rf values change if you used pure dichloromethane ( no methanol ) as the mobile phase for the TLC separation of curcumin
what is the ph solution obtained by mixing 25.00 ml of 0.250 ml HCl and 25.00ml of 0.125M NaOH
Calculate the energy per photon of electromagnetic radiation, for a photon having a frequency of 5.16 X 10^19 Hz (h = 6.626x10^-34 J s):
if 2000 l of hard water contains 0.022 m ca2+ and 0.0070 m mg2+, how many moles of na+ are needed to replace these ions?
Determine the amount of heat energy is needed to raise the temperature of 0.362 kilograms of Cu from 23. Degree Celsius to 60 degree Celsius?
Water (2290 ) is heated until it just begins to boil. If the water absorbs 5.43×105 of heat in the process, what was the initial temperature of the water?
has a volume of 58.0L and a pressure of 645mmHg. What is the temperature, in kelvins and degrees Celsius, of the gas?
Its undissociated form is red and its anionic form is yellow. What color would a methyl red solution have at pH = 7.0 ? Show your calculations. Hint: Determine the concentration ratio of methyl red and its conjugate.
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 ? NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5. Enter your answer with 2 decimal places.
The concentration of the first ion to precipitate (either Al3+ or Ca2+) decreases as its precipitate forms. What is the concentration of this ion when the second ion begins to precipitate
a sample of nitrogen gas kept in a container of vulume 2.43 L and temp 27degree C exerts a pressure of 4.83 atm. calculate the number of moles of gas present
Pd has a FCC lattice in which hydrogen atoms occupy octahedral holes. If 70% of the holes are filled by hydrogen atoms and the lattice does not expand upon hydrogenation, how many grams of hydrogen will be contained in one cubic centimeter of the ..
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