1. Scientists believe they know the average global temperature over the last 160

ID: 821716 • Letter: 1

Question

1. Scientists believe they know the average global temperature over the last 160,000 years. Which property of

the ice core samples from Antarctica provides this information?

A. the thickness B. the carbon dioxide concentration

C. the 1H/2H ratio D. the temperature

Think about which of these would be a component of rain and snow.

2. Determine the shape or geometry of NH3. (Hint: Use the Periodic Table to arrive at the electron

configuration for Nitrogen.)

A. tetrahedral B. trigonal pyramidal

C. bent D. trigonal planar

3. Which atmospheric component does not contribute to global warming?

A. H2O B. CO2

C. N2 D. CH4

4. Neither N2 nor O2 are greenhouse gases because

A. N2 and O2 react with one another, producing N2O2 when exposed to infrared radiation.

B. their overall electric charge distribution does not change when they vibrate.

C. infrared radiation causes their bonds to break.

D. their atmospheric concentrations are not changed by human activity.

Remember that greenhouse gases have a change in bond structure when interacting with infrared radiation.

5. Calculate the mass of 2.50

1). c is the correct answer...

The rate at which isotopes are exchanged depends on temperature..

2). b is the correct answer..

NH3 has the trigonal pyramidal structure.....

3). c is the correct answer...

All others have vibrations which distort electorn density..

6). c is the correct answer...

7). a is the correct answer..

9). c is the answer..

10). c

11). a

44). a

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