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Acetylene gas, C2H2(g), is used in welding.
(a) Write a balanced equation for the combustion of acetylene gas to CO2(g) and H2O(l).
(b) How much heat is produced in burning 1 mol of C2H2 under standard conditions if both\ reactants and products are brought to 298 K?
(c) What is the maximum amount of useful work that can be accomplished under standard conditions by this reaction?
Problem 1: Which is the stronger acid, HF or HBr (EN of = 4.0, EN of Br = 3.0)? Problem 2: Place the following compounds in order of increasing acidity (1 = least acidic, 5 = most acidic).
Write a balanced equation for the acid-base reaction that occurs when each of the following substances is dissolved in water. Explain why you chose the reaction that you did. Write the expression for K for each reaction. Explain whether K is a Ka ..
if 60 ml of a 1.6 m nacl solution is evaporated to dryness how many grams of salt will remain? a solution is prepared
Calculate the osmotic pressure at 20C of the solution 0.050M C12H22O11; assume complete dissociation for an ionic solutes.
What is the percent yield of CaO in the reaction CaCO3 yield CaO + CO2 if 5.33 g of CaO are obtained when 10.0 g of CaCO3 are used?
42 kg of graphite is added to 1 metric ton of iron and the mixture is heated to 1300 then slowly cooled to room temperature. Calculate the mass of each microstructure and the mass and composition of each phase within each microstructure at the fol..
Suppose you prepare a 500 ml of .10 M solution aqueous solution of some salt and let it sit out uncovered and some water evaporates. What happens to the concentration of salt
Sucrose , which is commonly known as table sugar, reacts in dilute acid solutions to form two simpler sugars, glucose and fructose, both of which have the formula At 23 and in 0.5 , the following data were obtained for the disappearance of sucrose
in an standardization process of 0.5000g KHP khc8h4o4 =MM 204.23g/mol was neutralize with 28.9mL of NaOH. Determine the molarity of NaOH
The reaction 2NO2 -> 2NO + O2 has the rate constant k= 0.65 M-1s-1. If the initial of NO2 is 7.30 x 10-2 M, how would you determine how long it would take for the concentration to decrease to 1.70 x 10-2M
Lithium will react with oxygen in a pressurized container to produce solid lithium oxide at 25°C. if 0.130 g Li(s) is placed in a 0.500 L container filled with oxygen at 1.90 atm
A subatomic particle created in an experiment exists in a certain state for a time of Δt = 5.0 × 10-20 s before decaying into other particles. Apply both the Heisenberg uncertainty principle and the equivalence of energy and mass to determine the mi..
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