HCHO Practice Exercise 1
We have just arrived at a bonding description for the formalde-
hyde molecule. Which of the following statements about the
molecule is or are true?

(i) Two of the electrons in the molecule are used to make the
Pie bond in the molecule.
(ii) Six of the electrons in the molecule are used to make the o
bonds in the molecule.

(iii) The C-O bond length in formaldehyde should be shorter
than that in methanol, H3COH.
(a) Only one of the statements is true.
(b) Statements (i) and (ii) are true.
(c) Statements (i) and (iii) are true.
(d) Statements (ii) and (iii) are true.
(e) All three statements are true

Achemist wants to extract copper metal from copper chloride solution. the chemist places 0.50 grams of aluminum foil in a solution containing 0.75 grams of copper (ii) chloride. a single replacement reaction takes place. (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction? a) approximately 0.36 grams, because copper (ii) chloride acts as a limiting reactant b) approximately 1.8 grams, because copper (ii) chloride acts as a limiting reactant c) approximately 0.36 grams, because aluminum acts as a limiting reactant d) approximately 1.8 grams, because aluminum acts as a limiting reactant

Define the kinetic molecular theory

40dm3 of gas at 760 torr are heated from 5°c to 50°c what is the new volume