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Both magnesium and alumnium react with an acidic solution to produce hydrogen. Why is that only one of the following equations correctly describes the reaction?
Mg(s) + 2H+(aq) --> Mg2+(aq) + H2(g)
Al(s) + 2H+(aq) --> Al3+(aq) + H2(g)
a certain first-order reaction has a rate constant of 7.20times10-3 at 45 . how many minutes does it take for the
The pH of a 0.55 M aqueous solution of hypobromous acid, HBrO, at 25.0 °C is 4.48. What is the value of Ka for HBrO.
Calculate the de Broglie wavelength for each of the following. a) a proton with a velocity 95% of the speed of light. b) a 160 g ball with a velocity of 10. m/s
which one of the following best describes the c3-c4 bond in 1-butene? a sp3-sp3 and sigma b sp2-sp2 and sigma c sp2-sp3
What is the molarity of a solution in which 4.00 moles of potassium chloride is dissolved in 3.00l of solution
a buffer solution is prepred by adding 5.50g of ammonium chloride and 0.0188 mol of ammonia to enough water to make 155mL of solution a) What is the pH of the buffer
What units do chemistry normally use for density of liquids and solids? for gas density? Explain the differences
A gas evolved during the fermentation of glucose ( wine making) has a volume of1.60 L when measured at 22.0 degree C and 1.00 atm. what was the volume of this gas at the fermentation temperature of 38.0 degree C and 1.00 atm pressure
the oxidation of copper 1 oxide cu2o s to copper 2 oxide cuo s is an exothermic process2cu2o s o2 g -gt 4cuo s deltah
calculate the mass in grams of solid benzoic acidc6h5cooh you would need in order toprepare 1.0 liter of benzoic
A 25.35g piece of iron and a 27.40g piece of gold at 100C were dropped into 920ml of water at 19.45C. The molar heat capacities of iron and gold are 25.19 J/(mol C) and 25.41 J/(mol C). What is the final temperature of the water and pieces of meta..
a sample of 4.5g of methane occupies 12.3l at 305k. calculate the work done when the gas expands isothermically
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