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How many kJ are in 27.4 kcal?
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- Insoluble AgCl(s) precipitates when solutions of AgNO3(aq) and NaCl(aq) are mixed. AgNO3(aq) + NaCl(aq) AgCl(s) + NaNO3(aq) rH = ? To measure the energy evolved in this reaction, 250. mL of 0.16 M AgNO3(aq) and 125 mL of 0.32 M NaCl(aq) are mixed in a coffee-cup calorimeter. The temperature of the mixture rises from 21.15 C to 22.90 C. Calculate the enthalpy change for the precipitation of AgCl(s), in kJ/mol. (Assume the density of the solution is 1.0 g/mL and its specific heat capacity is 4.2 J/g K.)is 2 NO2(g) → N2O4(g) + 19 kcal a exothermic or endothermicHow many Joules are there in 54.0 kcal? (1 cal = 4.184 J)
- Classify each as exothermic or endothermic AND explain why. N2O4(g) + 19 kcal → 2 NO2(g) H2O(g) + CO(g) → H2(g) + CO2(g) + 10 kcal2. A patient receives 2.5 L of intravenous (IV) glucose solution. If the liquid contains 5.0 g glucose per 100.0 mL of solution, then calculate the number of kilocalories that the patient receives from the glucose solution. Note, the caloric value of glucose is 4 kcal/g.Part D Food calories D1 Name of food product Naked juice D2 Mass of food nutrients in one serving Serving size 240ml Carbohydrate 33 g, protein 2 g fat D3 Calculations for calories (cal) or kilocalories (kcal) per serving Carbohydrate protein 0 g kcal(cal) kcal (cal) kcal (cal) Fat D4 Total calories (cal or kcal) per serving kcal(cal) 140 kcal (cal) D5 Calories ( for one serving ) listed on the label D6 Percentage of total calories from carbohydrate D7 Percentage of total calories from protein D8 Percentage of total calories from fat Q4 How does your calculated number of calories in one serving compare to the calories listed on the food product nutrition label? Comment on it. % % stv 26 MacBook Air
- A serving of peanut butter contains 204 food calories. The serving contains 9 grams of protein, 16 grams of fat and 6 g of carbohydrate. What percentage of calories comes from fat? (1 g fat = 9 kcal) (1 g protein = 4 kcal) (1 g carbohydrate = 4 kcal)Perform the conversions between energy units. 663 kJ=663 kJ= JJ 2655 kcal=2655 kcal= kJkJ 9.49×106 J=9.49×106 J= kcalThe following chemical reaction is an/a _______ reaction? 2C2H5OH(l) + 7O2(g) → 4CO2(g)+ 6H2O(g)+ 654 kcal Exothermic or endothermic?
