Afeed of 22.2 mole% ethanol and the balance water, at 1 atm and an enthalpy of 4,860 btu/lbmole, is to be separated by distillation in a plate column with open steam (at an enthalpy of 1,200 btu/1b) and a partial condenser. the bottom product is to contain 3.8 mole% ethanol and the distillate product (saturated vapour) 78 mole% ethanol. 10.0 lb of steam are used per lbmole of feed. (a) what is the condenser duty per mole of distillate product? (b) what are the co-ordinates of the δ point associated with the bottom of the column? (c) how many ideal stages are required? (d) how many actual plates are required, if the partial condenser is equivalent to one ideal plate and the rest of the tower has an overall efficiency of 75%?

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

answerapplication program;