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Calculate the amount of heat needed to change 1.0 g ice at 0 degrees C to water vapor at 100.0 degrees C.
How many kilojoules of heat are absorbed when 7.20g of MgO(s) is decomposed into Mg(s) and O2 (g) at constant pressure?
Explain what happened by using structures and chemical explanation of what did or did not happen.
Have you observed that when you spill water over your skin on a hot day it will cool you down but if you spill vegetable oil in place of water it will not cool you down give explanation for this difference?
Calculating new pH, a). How many mL of each of 0.10M lactic acid solution and 0.10M NaOH solution are needed to make 800mL of a buffer of pH 3.50?
Calculate the heat of formation, Hof, of pentane given that the Hof of H2O(l) is -285.3 kJ mol-1 and Hof of CO2(g) is -393.5 kJ mol-1.
what will be the temperature of the system when equilibrium is established? (sp Heat of H2O(s) = 2.09j/g . c (sp heat of H2O (l) = 4.18 J/g.c) Heat of Fus. of H2O(s)=333j/g
Calculate the weight percent composition of the mixture (hexane, heptanes, hexanol, and toluene). b. Calculate the mole percent composition of the mixture.
A 0.15 M solution of chloroacetic acid has a pH of 1.86. What is the value of Ka for this acid?
What is the purpose of Sodium phosphate dibasic when used to make ethanol via fermentation?
A 75.0 mL sample of acetic acid (HC2H3O2) is titrated to the equivalence point with 25.0 mL of 0.400 M NaOH. What is the molarity of the acetic acid solution?
Calculate the values of the rate constant k assuming that the reaction is first order
In clavulanic acid there is a carbon-atom that that has an oxygen-atom, a nitrogen-atom, and a carbon atom attached to it
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