Part F - 406.31 cal/gram
Part G - fat contains more calories per gram
Fat = 9 cal/g
Sugar = 3.76 cal/g
Palmitic acid (CH3202) is a dietary fat found in beef and butter. The caloric content of...
One tablespoon of peanut butter has a mass of 17 g. It is combusted in a calorimeter whose heat capacity is 110 kJ/degrees C. The temperature of the calorimeter rises from 22.0 degrees C to 25.2 degrees C. Find the food caloric content of peanut butter. Express your answer using two significant figures.
explosive nitroglycerin (C3 HN3 O9) decomposes rapidly ignition or sudden impact according to the following balanced equation: 4CaHsN3 Os (12CO2 (g) 10H2O(g) 6N2(g) + O2(g) AHpR=-5678 kJ You may want to reference (Pages 277-280) Section 6.9 while completing this problem. Part A Calculate the standard enthalpy of formation (A Hë) for nitroglycerin. Express your answer using four significant figures. ν0 ΑΣφ kJ/mol ΔΗ- Submit Request Answer
A 15.00 g milk chocolate bar is found to contain 9.500 g of sugar. Part B What will be the amount of sugar in milligrams if the size of the milk chocolate bar is reduced from 15.00 g to 5.000 g? Express your answer in milligrams to four significant figures. ► View Available Hint(s) IVO AED – O ? mg Submit Part C Given that a 15.00 g milk chocolate bar contains 9.500 g of sugar, calculate the percentage of...
solve A, B
Part A Calculate the H3 0 of the following polyprotic acid solution: 0.360 M H3 PO4 Express your answer using two significant figures. |V ΑΣφ H3O+]0.36 М Previous Answers Request Answer Submit X Incorrect; Try Again; 5 attempts remaining Part B Calculate the pH of this solution Express your answer using one decimal place - ν ΑΣφ pH0.44 Previous Answers Request Answer Submit
Review Constants Periodic Table Benzoic acid of mass 1.45 g is reacted with oxygon in a constant volume calorimeter to form H20(l) and CO2 (g) at 298 K The mass of the water in the inner bath is 1.70 x 10g The temperature of the calorimeter and its contents rises 2.82 K as a result of this reaction. Part A K Cp.m(H2O,1) - 75.3 J. mol Calculate the calorimeter constant. The standard enthalpy of combustion of benzoic acid at 298...
Calculate the standard cell potential (Eo) for the reaction X(s)Y (aq)X (aq)Y(s) if K 4.12x10-3 Express your answer to three significant figures and include the appropriate units. View Available Hint(s) HA ? Value Units Eo Previous Answers Submit If the equilibrium constant for a two-electron redox reaction at 298 K is 1.4x10-4, calculate the corresponding AG° and Ec under standard Express your answer using two significant figures. cel ΑΣφ conditions. ? AG0 = kJ Request Answer Submit Part B Express...
Our atmosphere is composed primarily of nitrogen and oxygen, which coexist at 25 °C without reacting to any significant extent. However, the two gases can react to form nitrogen monoxide according to the following reaction: N2 (g)O2(g) 2NO(g). Part D Estimate AG at 2050 K Express your answer using four significant figures. ΑΣφ ? AG° = kJ Previous Answers Request Answer Submit x Incorrect; Try Again; 7 attempts remaining
H2 reacts with the halogens (X2) according to the reaction: H2(g)+X2(g)⇌2HX(g) where X2 can be Cl2, Br2, or I2. Reactant/Product ΔH∘f(kJ/mol) ΔS∘f(J/mol⋅K) H2(g) 0 130.7 Cl2(g) 0 223.1 HCl(g) -92.3 186.9 Br2(g) 30.9 245.5 HBr(g) -36.3 198.7 I2(g) 62.42 260.69 HI(g) 26.5 206.6 Part A Calculate ΔH∘ for the reaction between hydrogen and Cl2. Express your answer using four significant figures. ΔH∘ Δ H ∘ = kJ Previous AnswersRequest Answer Incorrect; Try Again; 11 attempts remaining Part B Calculate ΔS∘...
Hydrogen and methanol have both been proposed as alternatives to hydrocarbon fuels. Part A Write balanced reactions for the complete combustion of hydrogen. Express your answer as a chemical equation. Identify all of the phases in your answer. 2H2 (8)+O2(g)+2H2O(1) Submit Previous Answers Request Answer * Incorrect; Try Again Part B Use standard enthalpies of formation to calculate the amount of heat released per kilogram of the fuel. Express your answer using four significant figures. DAXO amount of heat released...
Methanol (CH3OH) is used as a fuel in race cars. Part A Write a balanced equation for the combustion of liquid methanol in air, assuming H2O(g) as a product. Express your answer as a chemical equation. Identify all of the phases in your answer. SubmitPrevious AnswersRequest Answer Incorrect; Try Again; 5 attempts remaining Part B Calculate the standard enthalpy change for the combustion of 1 mol of liquid methanol, assuming H2O(g) as a product. Express your answer using four significant...