Chemistry, 06.09.2019 21:20 villafana36
The complete oxidation of one mole of a sugar produces carbon dioxide and water. 2000 kj of heat is transferred from the system to the surroundings. the rearrangement of bonds as 0.5 moles of the sugar are oxidized generates heat in an open test tube (101 j•l–1 pressure and 300 k temperature). what is the change in internal energy of the system (δu)? what is the change in enthalpy of the system(δh)?
Answers: 1
Chemistry, 21.06.2019 20:50
Which real-world scenarios below represent physical and chemical changes? -running a car -exploding fireworks -mixing water and powdered drink mix -combining oil and vinegar to make salad dressing -taking aspirin for a headache -diluting bleach with water-digesting dinner-spreading peanut butter on bread
Answers: 2
Chemistry, 22.06.2019 07:30
The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н,о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.
Answers: 2
Chemistry, 22.06.2019 17:00
Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness
Answers: 1
The complete oxidation of one mole of a sugar produces carbon dioxide and water. 2000 kj of heat is...
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