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A source of energy releases 3000 calories. This changed the temperature of a mass of water from 25 C to 55 C. What is the mass of the water?
Explain why a buffer made of equal concentrations of CH3COOH and CH3COO- does not change in pH when a small amount of NaOH (a strong base) is added to the solution. Does the NaOH dissociate into ions when it is added to the solution?
Draw the structure of the compound identified by the following simulated 1H and 13C NMR spectra.
How much heat is required to raise the temperature of 5.5 x 10^2 g of aluminum by 10°C?
Calculate the molarity of 52.56 grams of Al2(SO4)3 in 1.80 L of solution.
What is the standard change in Gibbs free energy of this reaction at 25 °C. Hint: The equilibrium constant is related to the change in Gibbs free energy
A closed container holds 3.14 mol of C(s) and 12.3 mol of O2(g) at 4.94 atm and -4°C. After the reaction has been run to completion (the only product is CO2(g)).
potassium hydrogen phthalate, a monoprotic acid with a molecular weight of 132 g/mol
A sample of neon is collected at 2.7 atm and 12.0 C. it has a volume of 2.25L.What would be the volume of this gas at STP?
calculate how many moles of KIO3 are needed to make 50 ml of 0.20 M solution?
What are most important organelles? Is How does biochemistry describe life processes? there a simple basis for classifying organisms?
How many milliliters of a 9.0 M H2SO4 solution are needed to make 0.25 L of a 3.5 M H2SO4 solution?
How much heat is required to warm 227 g of ice from -44.5°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C.
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