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Some commercial drain cleaners contain two components: sodium hydroxide and aluminum powder. When the mixture is poured down a clogged drain, the following reaction occurs NaOH (aq)+Al (s) + H2O (l)-->NaAl(OH)4 (aq) + H2 (g). The heat generated in this reaction helps melt away grease and the dihydrogen gas released sirs up the solids clogging the drain. Calculate the volume of H2 formed at 20celsius and 750 torr if 3.12 g of Al is treated with excess NaOH.
In a typical mass spectrum, a smaller signal is observed at a mass 1 amu higher than the molecular ion peak. Why? A) Due to small impurities in the sample
blood has normal glucose levels varies from 70 to 110 mg glucose per 100 ml of blood. brain damage may occur if the
What is the concentration of TCE that moves though air only by diffusion at a distance of 10 m if the initial particle concentration at the point of generation are 100 µg/m3?
A student is standardizing her NaOH solution as described in this experiment. She obtains the following results: mass of KHP=0.5438 g initial buret reading=3.22 mL final buret reading=20.46 mL What is the concentration of her NaOH solution
Problem- what is the solubility of AgI in 0.010M KCN solution. How does it compare to the solubility of AGI in water. Ksp of AGI=8.3x10^-17 and Kf of Ag(CN)2=5.3x10^18.
How much heat is required to vaporize 25.0g of water at 100C. The heat of vaporization of water at 100C is 40.7 kJ/mole.
HClO is a weak acid (Ka = 4.0 × 10-8) and so the salt NaClO acts as a weak base. What is the pH of a solution that is 0.087 M in NaClO?
How many grams of lithium are required to completely react with 60.7 mL of N2 gas at STP?
Is second order (in A) with rate constant 0.0006 L mol-1 s-1. At infinite time [A] = 0. How long will it take a solution with [A] = 79.2 M to decompose such that [A] = 17.2 M? Give your answer in seconds.
At 25 c and 1.0 atm, 0.25 g of a gas dissolves in 1.00 L of water. What mass of the gas dissolves in 1.00 L of water at 25 c and 3.0 atm?
One molecular form of elemental sulfur is a ring of eight sulfur is a ring of eight sulfur atoms. As one molecule of this element is burned to make sulfur trioxide, how many oxygen molecules are used?
If Delta H = -80.0 KJ and Delta S = -0.200 KJ/K, the reaction is spontaneous below a certain temperature. Calculate that temperature.
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