Fractional distillation of a mixture of 1: 1 ethyl acetate (b. p. 77.5°c) and 1-butanol (b. p. 117.0 °c) was performed, and differecns were collected. describe in detail, how many different fractions you will collect collect. pure or not? b. plot a graph for the fractional distillation data you will c. how can you use ir to check if the final fraction is pure or not?

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.

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)

If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted