Exam 2 Form C Key fall 07CHEM103A Dr. Keller

Exam 2 Form C Key fall 07CHEM103A Dr. Keller - Chemistry...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Chemistry 103A Exam 2C Answer Key 1. (2) The formula of chromium(II) nitrite is (a) Cr 2 N (b) CrN 2 (c) Cr 2 (NO 3 ) 2 (d) Cr(NO 2 ) 2 (e) Cr 2 NO 3 2. (2) Shortest wavelength radiation (a) FM radio (b) ultraviolet (c) television (d) infrared (e) AM radio 3. (2) When a substance has a very large specific heat (a) it must be a metallic element with a small atomic weight (b) the molecular weight is very small (c) a lot of heat is needed to increase its temperature (d) a small amount of heat can cause a large temperature change (e) it must be a nonmetallic element with a large atomic weight 4. (2) A photon has an energy of 2.49 x 10 -20 J. Find the frequency. (a) 5.31 x 10 -13 Hz (b) 2.67 x 10 8 Hz (c) 3.75 x 10 13 Hz (d) 2.67 x 10 -8 Hz (e) 3.75 x 10 -13 Hz 5. (2) In an atom in an excited state an electron drops from an allowed energy of 2.00 x 10 -17 J to one of 5.00 x 10 -13 J. The wavelength of the emitted photon will be (a) 398 pm (b) 3.98 x 10 -8 m (c) 0.0398 nm (d) 3.98 x 10 -3 mm (e) none of these 6. (2) The formula of silver(I) carbonate is (a) Ag 2 CO 3 (b) AgCO 3 (c) AgC (d) SiCO 3 (e) none of these
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
7. (2) If the energy of a photon increases (a) the speed increases (b) the wavelength
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

Exam 2 Form C Key fall 07CHEM103A Dr. Keller - Chemistry...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online