In performing this week's reaction, 45 mg of 2,4-dinitrophenylthiocyanate (225.18 g/mol) was isolated. This product yield...
In performing this week's reaction, 45 mg of 2,4-dinitrophenylthiocyanate (225.18 g/mol) was isolated. This product yield resulted in a 65% yield for the reaction. What amount of 2,4-dinitrobromobenzene (247.01 g/mol), in mg was used for the reaction? Assume an excess of bromine. Enter your answer as digits only, no units, using the proper number of significant figures.
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In performing this week's reaction, 45 mg of
2,4-dinitrophenylthiocyanate (225.18 g/mol) was isolated. This
product yield...
In this week's isolation experiment, assume that 53 mg of pure caffeine is isolated following sublimation...
In this week's isolation experiment, assume that 53 mg of pure caffeine is isolated following sublimation of the crude extraction product. If 2.92 g of tea leaves were used, what is the percent by weight of caffeine in the tea leaves? Enter your answer as digits only, no percent sign, using the proper number of significant figures.
4. The accepted value for the enthalpy for the following reaction is 466.85KJ/mol Mg. (10pts) Mg...
4. The accepted value for the enthalpy for the following reaction is 466.85KJ/mol Mg. (10pts) Mg (s) +2HCI (aq)MgCl2(aq)+ H2(g) Calculate the heat that would be generated if 5.00g of magnesium reacts with excess hydrochloric acid. Include correct units and significant figures with your answer.
6) In the synthesis of bromopropane we used NaBr and H2S04. Why the reaction does not...
6) In the synthesis of bromopropane we used NaBr and H2S04. Why the reaction does not work with only NaBr? 7) The following is a reaction you will see in second semester organic chemistry. The molecular weight of methyl benzoate is 136.16 g/mol and the molecular weight of the product is 181.15 g/mol. COCH3 COCH3 HNO3 i H2SO4 NO2 methyl benzoate methyl 3-nitrobenzoate Assume you have excess acid and you start off with 2.4 g of methyl benzoate. What is...
7. Calculate the maximum amount of hexaphenylbenzene (molar mass = 534.7 g/mol) possible (theoretical yield) when 1...
7. Calculate the maximum amount of hexaphenylbenzene (molar mass = 534.7 g/mol) possible (theoretical yield) when 125 mg of diphenylacetylene (molar mass - 178.2 g/mol) reacts with 125 mg of tetraphenylcyclopentadienone (molar mass 384.5 g/mol). Give your answer in units of milligrams (mg). The reaction is given below. 8. Calculate the percent yield when 75.0 g of diphenylacetylene (molar mass = 178.2 g/mol) reacts with 75.0 g of tetraphenylcyclopentadienone (molar mass = 384.5 g/mol) and produces 75.0 g of hexaphenylbenzene...
For the reaction Ti(s)+2F2(g)→TiF4(s) compute the theoretical yield of the product (in grams) for each of...
For the reaction Ti(s)+2F2(g)→TiF4(s) compute the theoretical yield of the product (in grams) for each of the following initial amounts of reactants. 5.0 g Ti, 5.0 g F2 Express your answer using two significant figures. 2.5 g Ti, 1.6 g F2 Express your answer using two significant figures. 0.232 g Ti, 0.295 g F2 Express the mass in grams to three significant figures.
1. The reaction N2 + 3 H2 2NH3 is used to produce ammonia. When 450. g of hydrogen...
1. The reaction N2 + 3 H2 2NH3 is used to produce ammonia. When 450. g of hydrogen is reacted with nitrogen, 2550 g of ammonia should be produced. If a chemist actually obtains 1,977 g of ammonia in the lab, what is the percent yield of this reaction? Report your answer to the correct degree of certainty. Do not included units (% yield is understood). 2.Calculate the volume of 2.12 moles of nitrogen gas at temperature of 31.7 oC and a pressure of...
1. Precipitation reaction given two reactants containing appropriate cations and anions, predict the product solid...
1. Precipitation reaction given two reactants containing appropriate cations and anions, predict the product solid (precipitate) and the soluble second product. Write a balanced molecular equation, a complete ion ic equation, and/or a net ionic equation for the reaction. a.) MgC12 _NaOH b.) Pb(NO3)2_K2SO4 2. Mg 2 HCI MgCl2 H2. If a chemist uses 20 g Mg and excess HCI, what mass of MgC12 product would form? 3. Mg + 2 HCI MgC12 H2. If a chemist uses 20 g...
What is the theoretical yield (in grams) of phosphorus pentachloride when 3.85 g of phosphorus reacts...
What is the theoretical yield (in grams) of phosphorus
pentachloride when 3.85 g of phosphorus reacts with 25.8 g of
chlorine according to the following reaction:
P4 (s) + 10 Cl2 (g) → 4
PCl5 (l)
Use the correct number of significant figures, fill in the
number ONLY!
lan 4 15 What is the mass of excess reactant (in grams) that remains after the limiting reagent produces the maximum amount of phosphorus pentachloride possible upon the reaction of 4.69 g...
What is the major product of the following condensation reaction? Heat A student investigated several esters, and made...
What is the major product of the following condensation reaction? Heat A student investigated several esters, and made octyl acetate, an ester with the fragrance of oranges. The student used the acid derivative, acetyl chloride and 1-octanol. Using the following information, calculate the theoretical yield for the student. (Hint: you need to calculate the molar masses and to identify the limiting reagent). Structural Equation OH + ~ octyl acetate Quantities used: acetyl chloride: 0.620 g 1-octanol: 1.303 g. Calculate theoretical...
The top loading balance is used to weigh out 1.13 g of salicylic acid as a...
The top loading balance is used to weigh out 1.13 g of salicylic acid as a reactant in the synthesis reaction. Given that the molar mass of salicylic acid is 138.1 g/mol, how many mmols is this equivalent to ? Enter a numeric answer only, to the correct number of significant figures. Do not include units.
4. The accepted value for the enthalpy for the following reaction is 466.85KJ/mol Mg. (10pts) Mg (s) +2HCI (aq)MgCl2(aq)+ H2(g) Calculate the heat that would be generated if 5.00g of magnesium reacts with excess hydrochloric acid. Include correct units and significant figures with your answer.
6) In the synthesis of bromopropane we used NaBr and H2S04. Why the reaction does not work with only NaBr? 7) The following is a reaction you will see in second semester organic chemistry. The molecular weight of methyl benzoate is 136.16 g/mol and the molecular weight of the product is 181.15 g/mol. COCH3 COCH3 HNO3 i H2SO4 NO2 methyl benzoate methyl 3-nitrobenzoate Assume you have excess acid and you start off with 2.4 g of methyl benzoate. What is...
7. Calculate the maximum amount of hexaphenylbenzene (molar mass = 534.7 g/mol) possible (theoretical yield) when 125 mg of diphenylacetylene (molar mass - 178.2 g/mol) reacts with 125 mg of tetraphenylcyclopentadienone (molar mass 384.5 g/mol). Give your answer in units of milligrams (mg). The reaction is given below. 8. Calculate the percent yield when 75.0 g of diphenylacetylene (molar mass = 178.2 g/mol) reacts with 75.0 g of tetraphenylcyclopentadienone (molar mass = 384.5 g/mol) and produces 75.0 g of hexaphenylbenzene...
1. Precipitation reaction given two reactants containing appropriate cations and anions, predict the product solid (precipitate) and the soluble second product. Write a balanced molecular equation, a complete ion ic equation, and/or a net ionic equation for the reaction. a.) MgC12 _NaOH b.) Pb(NO3)2_K2SO4 2. Mg 2 HCI MgCl2 H2. If a chemist uses 20 g Mg and excess HCI, what mass of MgC12 product would form? 3. Mg + 2 HCI MgC12 H2. If a chemist uses 20 g...
What is the theoretical yield (in grams) of phosphorus
pentachloride when 3.85 g of phosphorus reacts with 25.8 g of
chlorine according to the following reaction:
P4 (s) + 10 Cl2 (g) → 4
PCl5 (l)
Use the correct number of significant figures, fill in the
number ONLY!
lan 4 15 What is the mass of excess reactant (in grams) that remains after the limiting reagent produces the maximum amount of phosphorus pentachloride possible upon the reaction of 4.69 g...
What is the major product of the following condensation reaction? Heat A student investigated several esters, and made octyl acetate, an ester with the fragrance of oranges. The student used the acid derivative, acetyl chloride and 1-octanol. Using the following information, calculate the theoretical yield for the student. (Hint: you need to calculate the molar masses and to identify the limiting reagent). Structural Equation OH + ~ octyl acetate Quantities used: acetyl chloride: 0.620 g 1-octanol: 1.303 g. Calculate theoretical...
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