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30 g of silicon at 80.0 degrees Celsius is added to 70 mL of water at 20 degrees Celsius. Calculate the final temperature after the two substances are mixed together. The specific heat of water is 4.184 J/ g *c and the specific heat for silicon is 0.7121 J/ g*c.
Calculate K for the reaction between glutamate and ammonia. (The standard free energy change for the reaction is +14.2 . Assume a temperature of 298 K.
What are the concentrations of HSO4-, SO42-, and H+ in a 0.14 M KHSO4 solution? (Hint: H2SO4 is a strong acid; Ka for HSO4- = 1.3 10-2.)
determine the net change of oxidation number of each of the elements in the redox equations.
What is the boiling point of acetone at an elevation where the external pressure is 323 torr?
The handling of sodium bicarbonate is difficult due to the release of co2 during the adjustment of the pH, why can't other bases known be be easy to handle such as sodium hydroxide be used
How many minutes would be required to electroplate 25g of chromium by passing a constant current of 4.80 amperes through a solution containing CrCl3
The pressure inside a hydrogen-filled container was 2.10 atm at 21 C . What would the pressure be if the container was heated to 85 C
Give the structure that corresponds to the following molecular formula and 1H NMR spectrum: C7H12Cl2: ? 1.07 (integral = 6203, s); ? 2.28 (integral = 1402, d, J = 6 Hz)
What is the molar concentration of the solution of 37.5g Ba(MnO4)2 per Liter? What is molar concentration with respect for each ion, Ba2+ and MnO42-
Draw structure of the product(s) (show stereochemistry) of bromine addition to fumaric acid assuming that bromine adds to this compound the same way it does to cinnamic acid.
The vapor pressure of pure methyl alcohol at 19 degrees celcius is 90.0 torr and that of pure ethyl alcohol is 40.0 torr. Assume a mixture of methyl alcohol and ethyl alcohol is ideal.
For the reaction 2Na(s) + Cl2(g) -> 2NaCl(g), how many grams of NaCl could be produced from 103.0g molecules of Na and 13.0 of Cl2 (at STP)?
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