Get college assignment help at uniessay writers A sample of a new compound is burned in an excess of air to produced CO2 and H2O. If 0.468 g of the sample produce 0.458 g of CO2 and 0.094 g of H2O and the molar mass is about 230, what is the likely molecular formula of this compound?
Determine whether the entropy of the system increases or decreases in SO2(g) Br2(g) 2H2O(ℓ) —> H2SO4(aq) 2HBr(aq) 1. increases 2. Unable to determine 3. The entropy does not change. 4. decreases
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For a given transfer of energy, a greater change in disorder occurs when the temperature is high. 1. True 2. False
explain how to find distinct terminal alkynes: c3h4 c5h8 c6h10
Draw both extended and Fischer representation of each of these compounds. citric acid: 2-hydroxy-1,2,3-propanetricarboxylic acid ( )-isocitric acid: 1R, 2S-1-hydroxy-1,2,3-propanetricarboxylic acid (-)-isocitric acid: 1S, 2R-1-hydroxy-1,2,3-propanetricarboxylic acid ( )-alloisocitric acid: 1S, 2S-1-hydroxy-1,2,3-propanetricarboxylic acid (-)-alloisocitric acid: 1R, 2R-1-hydroxy-1,2,3-propanetricarboxylic acid
Starting with an alkane or alkene, show how you could synthesize the following compounds using a nucleophilic substitution reaction for the final step. Be sure your method will give a pure product, not a mixture of isomers. a. CH3(CH2)4CH2SCH3 b. CH3(CH2)3CHCH3 | CN c. CH3CH2CHCH2CH2CH3 | OCH3 d. (CH3CH2CH2CH2CH2)2O O || e. (CH3CH2)3COCCH3
A common industrial unit for expressing the concentration of hydrogen peroxide is to state the relative volume of oxygen gas at 0 Cand 1 atm, produced per volume of hydrogen peroxide solution that decomposes. For example, when 1 L of a 20-volume solution of hydrogen peroxide decomposes, 20 L of oxygen gas at 0 C and 1 atm is produced. a. Calculate the concentration of a 27. volume in units of mass percent b. Calculate the concentration of a 27. volume in units of molarity Concentration Density (at 0 C) V27 1.026 27 mass% 1.110 pure 1.471
A gaseous reaction occurs at a constant pressure of 35.0 and releases 70.0 of heat. Before the reaction, the volume of the system was 8.00 . After the reaction, the volume of the system was 3.00 . Calculate the total internal energy change, , in kilojoules.
draw the structure(E)-2, 4-dimethyl-2-hexenoyl chloride
Get college assignment help at uniessay writers 1. How would you change the procedures in this experiment if you wished to synthesize benzalacetone, C6H5CH=CHCOCH3? Benzalacetophenone, C6H5CH=CHCOC6H5?
Calculate the amount of heat necessary to raise the temperature of 8.50 kg of water from 12.5°C to 84.0°C
Ammonia gas is synthesized according to the balanced equation below. N2(g) 3 H2(g) 2 NH3(g) If 2.50 L N2 react with 7.00 L H2, what is the theoretical yield (in liters) of NH3? Assume that the volumes of reactants and products are measured at the same temperature and pressure.
write a balanced chemical equation showing how you could prepare salts from an acid base reaction Kno3, NaBr, cas
For the second-order reaction below, the concentration of the product, B, after 444 seconds is 0.0730 M. If no B is initially present, and the initial concentration of A is 0.744 M, what is the rate constant? 2A ® B rate = k[A]2
wats the name for Hg22
The enthalpies of combustion are −1401, −1550, and −286 kJ mol−1 respectively for C2H4(g), C2H6(g), and H2(g). What is the enthalpy change for the reaction below? (Show how the combustion reactions combine to give the reaction below!) C2H4(g) H2(g) → C2H6(g) ?
A gas temperature at 100C occupies a volume of 154 mL. What will the volume be for the same amount of gas at a temperature of 10C, assuming no change in pressure?
What is the molarity of a solution that contains 58.0 of vitamin B1 hydrochloride (molar mass = 337 ) in 350 of solution?
Holt Chemfile Lab Program: Reactivity of Halide Ions Experiment A3
The temperature of a 500. ml sample of gas increases from 150. K to 350. K . What is the final volume of the sample of gas. If the pressure in the container is kept constant.
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