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What was the rate of production of 24Na in a 30-m reactor irradiation of 23Na if the activity of 24Na was found to be 1.0 mCi 3 h after the end of irradiation?
Density and Identity, The mass of 5.00 mL carbon tetrachloride is 7.97g. What is the density of the carbon tetrachloride?
Use the values of Ka1 = 0.056 and Ka2 = 5.4 x 10-5 to calculate the [OH-] in a 0.456 M solution of oxalic acid (H2C2O4). Use E notation and 3 significant figures.
A 155-g piece of copper at 159oC is dropped into 250.0 g of water at 18.7oC. (The specific heat of copper is 0.385 J/goC.) Calculate the final temperature of the mixture.
CH3OH(g)-> CO(g) + 2 H2(g) H = +90.7 kJ Calculate E when 335.0 g of CH3OH(g) completely reacts at a constant temperature of 300 K and constant pressure of 0.95 atm. R = 8.314 J/mol*K and R = 0.08206 atm*L/mol*K
The rate constant at 25oC is 3.7×10^9 mol^-1 L s^-1. In an experiment, 0.500 L of 0.020 mol L ^-1 NaOH(aq) is rapidly mixed with an equal volume of 0.020 mol L^-1 HCN(aq). Calculate the time, in seconds, required for this [OH] to decrease to 1.0×1..
A 4.16 g sample of ascorbic acid is titrated with 0.83 M red dye. What volume of red dye is required to reach the endpoint? Molar mass of red dye =267.08 g/mol; molar mass of ascorbic acid =176.12 g/mol
Lakes that have been acidified by acid rain can be neutralized by liming, the addition of limestone (CaCO3 ). How much limestone in kilograms is required to completely neutralize a 3.8 x109 lake with a pH of 5.5.
When butane (C4H10) reacts with oxygen, ... carbon dioxide and water are produced. The balanced equation for this reaction is
Estimate the temperature where ?G=0 for the following reaction: (giving ?H= -176 kJ, and ?S= -284.5 J/K) CAUTION Beware of units. NH3(g)+HCl(g)--->NH4Cl(s)
how many grams of KO2 are needed to produce 180.0 L of O2 at 18.0 C and 1.00 atm
What mass (in grams)of KNO3 would have to be decomposed to produce 27.1 L of oxygen measured at STP?
A solution of NaOH(aq) contains 7.4 g of NaOH(s) per 100.0 mL of solution. Calculate the pH and the pOH of the solution at 25 °C.
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