REVIEW WEEKREVIEW WEEK

Day 3Day 3

Average Atomic MassAverage Atomic Mass

• What is the average mass of Vanadium?

Vanadium – 51 is 90% Vanadium – 50 is 7% Vanadium – 49 is 3%

Molar ConversionsMolar Conversions

• 760.92g Os --------> Moles Os

• 7.829 × 1024 atoms Pb --------> Moles Pb

• 294g Tc ----------> Atoms Tc

Molar Conversions cont.Molar Conversions cont.

1. A Miner finds a 200g nugget of copper. Given that copper’s atomic mass is 63.54, how many atoms of copper did he find?

2. A chemist needs 17 mol of Mg for an experiment, how many grams does her sample need to weigh?

1. Light, x-rays, radio waves, etc all have the same _______

2. Frequency is measured in ______

3. The distance between peaks of a wave is its ______

4. For an electron to go into an excited state energy must be ______

5. P orbitals are shaped like _______

• A line on the emission spectrum has a wavelength of 999nm, what is its frequency?

1 meter = 1,000,000,000 nm