6. Acetylene gas (C2H2) reacts with oxygen to produce carbon dioxide and water. When 30.0 g of acetylene is reacted with O2, 18.5 g of water is formed.
2 C2H2 (g) + 3 O2 (g) → 2 CO2 (g) + 2 H20 (1)
a) What type of reaction is this?
b) What is the percent yield of this reaction?

Compare the equilibrium constants for the systems shown in the table. which favors products the most? which favors products the least? rank these systems in order from most to least in terms of favoring products rather than reactants. d > b > a > c c > a > b > d b > c > d > a a > d > c > b

Compare and contrast physical changes with chemical changes.

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next