Adam observed properties of four different waves and
recorded observations about the frequency and volume of
each one in his chart.
Which statement could Adam declare based on the data in
the table?
Wave
Observations
250 hertz
12 dB
250 hertz
76 dB
1000 hertz
81 dB
250 hertz
81 dB
O Only the sound quality of waves Y and Z can be
compared.
O. The sound quality of all of the waves can be compared.
O The sound quality of waves W and X can be compared.
O The sound quality for these waves cannot be compared.

In numbering carbon atoms in the parent chain of a hydrocarbon, why would you number from right to left, rather than left to right

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

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