In an energy diagram for an endothermic chemical reaction which of the following

Question

In an energy diagram for an endothermic chemical reaction which of the following is true? a The energy of the products is lower than that of the reactants. b. The energy of the transition state is higher than that of the reactants. c. both a and b d neither a nor b A stockroom attendant has a 15.0% (w/v)solution of KOH. What volume of this solution should she use if she needs to prepare 20.0 mL of a 10.0 % (w/v) solution? a 667 ml. b. 7.50 mL. c. 133 ml d. 15.0 mL A chemist has a sample which is known to be a solution. Which of the following might be used to separate the components of the solution? a distillation b filtration c. either a or b d. neither a nor b

Explanation / Answer

ANSWER ==

1 ..OPTION B IS CORRECT

2.. N1V1=N2V2 ==> 13.3 ML

3.. DISTILLATION USE FOR SOLUTION SEPARTION

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