10 Which of these steps could be used in an investigation about the effect of gravity?
OA. testing which surface is easier to slide a wooden block across
OB. measuring the time it takes for a ball to fall a certain distance
OC. measuring the distance a toy car moves after it is pushed
OD. counting how many paper clips stick to a magnet in a chain
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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

Which is the most concentratic acid

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