Lee heats up a saucepan of water to make some macaroni and cheese. He places the saucepan on the stove, turns on the burner, walks away and is distracted by a phone call. He returns one hour later, turns off the stove, and finds the saucepan is now empty. Which statement below explains why the saucepan is empty?

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

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?

How does a noncompetitive inhibitor reduce an enzyme’s activity?