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An oxide of copper is decomposed forming copper metal and oxygen gas. A 0.500 g sample of this oxide is decomposed, forming 0.444 g of copper metal. What is the empirical formula of the gold oxide?
Enough of a monoprotic acid is dissolved in water to produce a 0.0177 M solution. The pH of the resulting solution is 2.65. Calculate the Ka for the acid.
If you wanted to know how much carbon there is in a 100kg person, what information would you need? Try to calculate the amount of carbon in a 100kg person.
Consider the hydrazinenitrogen tetroxide rocket fuel reaction: 2N2H4 + N2O4 3N2 + 4H2O How many grams of N2H4 will be consumed by 46 g of N2O4?
Determine whether a solid forms when solutions containing the following salts are mixed. If so, write the ionic equation and the net ionic equation. NaF and AgNO3 . Write the ionic equation.
Is the wave behavior of light adequate to explain all phenomena? Give three examples of cases
What is the density (in grams per liter) of a gas mixture that contains 20.5% F2 and 79.5% He by volume at 793mm Hg and 28.5C
assuming no energy is transferred to or from the surroundings, calculate the final temperature of the water after all the ice melts heat capacity(s) 37.7 jmolk
A silver electrode is placed in a saturated solution of AgBr. This half-cell is connected to a standard hydrogen electrode and the voltage is found to be +0.437 V. Calculate Ksp for AgBr.
Sodium-24 has a half-life of 15.0 hours and is used to study blood circulation. If a patient is injected with 20.0 grams of Na-24 (usually done in the form of 24NaCl), how much is still present in the patient after 4.0 days?
analyze run-off water for the presence of a.) heavy metals; b.) BTX( Benzene-toluene-xylenes); and c.) PNA ( polynuclear aromatic compounds).
How many grams of KCl would be required to react with 420 mL of 0.42 M AgNO3 solution?
Calculate the pH of a buffer that contains 0.270 M hydrofluoric acid (HF) and 0.180 M cesium fluoride (CsF). The Ka of hydrofluoric acid is 6.80 x 10^-4.
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