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Does caffeine or chlorophyll have a higher Rf value? Briefly explain why by discussing the intermolecular forces present in the molecules
Helium gas is heated at constant volume from a state of 100 kPa, 300 K to 500 K. A following process expands the gas at constant pressure to four times the initial volume.
Calculate the amount (in grams) of N-methylmaleimide and 9-(hydroxymethyl)anthracene that are required in a reaction utilizing 0.5mmol 9-(hydroxymethyl)anthracene (208.26 g/mol) and 3 molar equivalents of N-methylmaleimide (111 g/mol)
If it takes 34.0 mL of 0.0250 M K2Cr2O7 to titrate 10.0 mL of a solution containing Fe2+, what is the molar concentration of Fe2+.
If the final solution has a bromide ion concentration of 1.26 M, what was the concentration of the SrBr2 solution? (the volumes are additive) I dont understand how to write the reaction
a sample of HCI is placed in a 256ml flask where it exerts a force of 67.5 mmHg. What is the pressure of the gas if it is transfered to a 135mL flask?
A 0.0100 molal aqueous solution of a weak acid freezes at -0.0205 oC. Calculate the percent ionization of the weak acid, HA.
Estimate the uncertainty in the position of one Nitrogen molecule (N2) traveling 300 +/- 0.2 (meters per second) Assume the mass of the nitrogen molecule is 4.65x10^-23 grams
Calculate the pH during the titration of 100.0 mL of 0.200 M HCl with 0.400 M NaOH. First what is the initial pH (before any NaOH is added)? What is the pH after 31.9 mL of NaOH are added?
Al(OH)3 + 3HCl ---> AlCl3 + 3H2O Determine the moles of acid neutralized if a tablet contains 0.200 mol Al(OH)3
Calculate the oxygen content of the plasma in mM! 1 ml plasma dissolves 24 uL oxygen at 38 degrees C if the partial pressure is 103 kPa.
Give the structure that corresponds to the following molecular formula and 1H NMR spectrum:
what the volume of 0.109m HNO3 that is required to reat completely with 2.5g Barium hydroxide
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