Problems (Chapter 7)

1- (a) What is the frequency of light having a wavelength of 456 nm? (b) What is the wavelength (in nanometers) of radiation having a frequency of 2.45 × 109 Hz. 

2-The first line of the Balmer series occurs at a wavelength of 656.3, what is the energy difference between the two energy levels involved in the emission that results in this spectral line.

      3.027× 10-19 J

3- An electron in the hydrogen atom makes a transition from an energy state of principle quantum number ni to the n = 2 state. If the photon emitted has the wavelength of 434 nm, what is the value of ni.

4- Write the ground state electron configurations for the following

K       Pr      Mo      Te        Kr

Problems (Chapter 5)

1- A sample of air occupies 3.8L when the pressure is 1.2 atm

  (a)What volume will it occupy at 6.6 atm.

  (b)What pressure is required in order to compress it to 0.075 L

     in both case the temperature is kept constant.

2- The temperature of 2.5 L of a gas initially at STP is raised to 250°C at constant volume. Calculate the final pressure of the gas in atm.

3- At 741 torr and 44°C, 7.10 g of a gas occupy a volume of 5.40 L, what is the molar mass of the gas.

4- Calculate the density of hydrogen bromide (HBr) gas in grams/litters at 733 mmHg and 46°C.

5- A compound has the empirical formula SF4. At 20°C, 0.100 g of the gaseous compound occupies a volume of 22.1 ml and exerts a pressure of 1.02 atm. What is the molecular formula of the gas.

خطة تفويج شعب الكيمياء

تفويج الساعة 12:30
نور باسودان	AA1, CA, EA1, HA1	القاعات 1 و 2 و 3 و 4 و 6 و 7	مبنى 4
ريما الحارثي	DA3, and 35 from GA1	القاعات 101 و 102 و 103	مبنى 1
ريما الحارثي	30 from GA1	القاعة 106	مبنى 3
تفويج الساعة 1:40
سهير جنبي	JA1, FA1, HA1	القاعات 1 و 2 و 3 و 4 و 5	مبنى 4
ضحى الهاشمي	IA1	القاعات 6 و 7	مبنى 4
ضحى الهاشمي	KA1	القاعات 102 و 103	مبنى 1
عزة شكري	BA6 و OA1	القاعات 101 و 102	مبنى 1
ليلى الحربي	VA	القاعة 106	مبنى 3
زهراء العمشاني	WA1	القاعة 106	مبنى 3
تفويج الساعة 2:30
عائشة مباركي	AA6, BA1, CA5, DA5	القاعات 1 و 2 و 3 و 4 و 5 و 6 و 7	مبنى 4
دلال زين العابدين	MA	القاعات 101 و 102	مبنى 1
ضحى الهاشمي	LA	القاعات 102 و 103	مبنى 1