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For the reaction represented by the equation Cl2 + 2KBr ® 2KCl + Br2, calculate the percentage yield if 200. g of chlorine react with excess potassium bromide to produce 410. g of bromine.
The specific heat capacities of Fe(s) and water are 0.45 J/g? and 4.184 J/g?, respectively. What is the final temperature of the system?
1. calculate the mass in grams for a sample of al that absorbs 1.70kj when the temperature increases from 56 degree
compute the activation energy for the flashing process. when at 29o c the average rate is 3.3 flashes every 10 seconds
The gravitational force exerted on a solid object is 5 N. When the object is suspended from a spring scale and submerged in water, the scale reads 3.5 N. What is the density of the object
a radioisotope used to evaluate heart function in exercise stress tests, decays by capturing one of its own core electrons. it also emmits gamma rays. write an equation for its nuclear decay, then identify the daughter isotope
For each of the compounds below, first write a structural formula and then indicate which of them is likely to absorb in the UV region. Briefly explain your reasoning. A. cyclohexanol B. 2,4-hexadienal C. 2-methyl-5-vinylpyridine
An aqueous solution is 33.0% by mass methylamine (CH3NH2) and has a density of 0.85 g·cm-3. a) If 48.7 mL of this solution is diluted to 1009.0 mL, what is the pH of the resulting solution
Find the amount of thermal energy produced in kilojoules when 18.9 g of water is heated from 16°C to 98.0°C.
the freezing point of a CaCl2 solution is -25 degrees C. a) what is the molality(m) of the CaCl2 solution? b) what is the boiling point of the CaCl2 solution
Dolomite is a mineral consisting of calcium carbonate (CaCO3) and magnesium carbonate (MgCO3). When dolomite is strongly heated, its carbonates decompose to their oxides (CaO and MgO) and carbon dioxide is expelled.
What is the concentration of the chloride ion (in M) in a solution which contains 57.6 g aluminum chloride in 501 mL of solution
Why is the dissolving of salt sometimes an exothermic and sometimes an exothermic process
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