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Butane has a heat of vaporization of 22.44 kj/mol and a normal boiling point of -0.4 C. A 250 ml sealed flask contains 0.6 g of butane at - 22C. How much butane is present as a liquid
When a glow stick is placed in a freezer, its chemiluminescence lasts a significant time longer. How might this come about?
If the Ka of a monoprotic weak acid is 1.4 × 10-6, what is the pH of a 0.33 M solution of this acid
A 1.30 M solution of citric acid (H3C6H5O7) in water has a density of 1.10 g/cm3. Calculate the mass percent, molality, mole fraction, and normality of the citric acid. Citric acid has three acidic protons.
how many grams of calcium hydroxide will be needed to react with 10.0g of phosphate acid(h3PO4). how many grams of calcium phosphate will form?
A volume of 95.0 ml of H2O is initially at room temperature (22.0 C). A chilled steel rod at 2.00 C is placed in the water. If the final temperature of the system is 21.1 C .
Total heat evolved by the reaction by adding the heats required to raise both the solution and the calorimeter to the maximum temperature. 5). Heat evolved per mole of Mg 6) Change in enthalpy for the following specific reaction. Be sure to indica..
the liberated CO2 was collected on calcium oxide and found to weigh .0515g. Calculate the percentage of aluminum in the sample
In oxidation of benzoin to benzil with nitric acid, why it is important to avoid heating the mixture above 70 °C? What is the possible side product if this happens
what is the limiting reactant when 3.41g of lithium with 2.79g of copper II nitride?predict the products, write a balanced equation, calculate the limiting reactant.
the reaction a->b=c is found to be a zero order. If it takes 4.3 x 10^2 secounds for an initial conventration of A to go from .50 M to .25 M, what is the rate constant for the reaction
If the water in your house has 1000.0 mg/L of calcium carbonate dissolved in it, How many grams of sodium oxalate could you mix with 100.0 mL of that water before a precipitate would form.
Calculate the pH of 0.500L of a buffer solution composed of 0.20 M butyric acid (CH3(CH2)2)2COOH, Ka = 0.000015) and 0.10 M sodium butyrate, (NaCH3(CH2)2COO).
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