Miscellaneous
According to Heisenberg's Uncertainty Principle, the more certain you know the __________________ of the electron, the less certain you can know its _________________________
Position, velocity
An element consists of 69.17% of an isotope with a mass of 62.930 amu and a second isotope with a mass of 64.928 amu. Identify the element
Copper or Cu
T/F An element with the electron configuration of [Ar]4s23d6 is a main group element
False; transition element
The density of iron is 7.87 g/mL. What is the mass 4.00 cm x 3.00 cm × 2.00 cm block
of iron? 1 mL = 1 cm3
188.88 g
What orbitals do the different values for l correspond to?
l=0 --> s
l=1 --> p
l=2 --> d
l=3 --> f
According to ________________________________, no two electrons in an atom can have the same ________ quantum numbers
Pauli exclusion principle, 4
Uranium has three naturally occurring isotopes: Uranium-238 (mass 238.05 amu), Uranium-235 (mass 235.04 amu), and Uranium-234 (mass 234.04 amu). Their respective fractional abundances are 99.27%, .719%, and .011%. Find the atomic mass of Uranium.
238.03 amu
What periodic table grouping is the first column and what charged ion does it form
Alkali Metals, +1
How many cubic centimeters are there in 5.78 yd3? 1 in = 2.54 cm, 1 yard = 3 feet, 1 foot = 12 in
4.42 x 106 cm3
Write the full electron configuration for Ti (atomic number 22)
1s22s22p63s23p64s23d2
What mass of iron (Fe) in pg contains 2.39x1011 atoms Fe? Give your answer to 3 significant figures.
22.2 pg
Boron (B) has an average atomic mass of 10.81 amu and has two naturally occurring isotopes. Isotope 1 has an atomic mass of 10.013 amu and Isotope 2 has an atomic mass of 11.009 amu. What are the relative abundances of the respective isotopes? Give the answer as a percent.
Isotope 1 = 19.98%
Isotope 2 = 80.02%
Which of the following is considered a halogen?
Na
I
Ca
Kr
I
In Europe, gasoline efficiency is measured in km/L. If your car's gas mileage is
40.0 mi/gal, how many liters of gasoline would you need to buy to complete a 142-
km trip in Europe? Use the following conversions: 1km=0.6214mi and 1gal=3.78L
8.35 L
How many electrons can have the quantum numbers: n = 3, ml = +1
4
Calculate the de Broglie wavelength in pm of a xenon gas atom (Chemical symbol: Xe)
moving 498 m/s. Give your answer to 3 significant figures
6.07 pm
An element has four naturally occurring isotopes. The first isotope has a mass of 83.9134 and abundance of 0.56%. The second isotope has a mass of 85.9093 and abundance of 9.86%. The third isotope has a mass of 86.9089 and abundance of 7.00%. The fourth isotope has a mass of 87.9056. Find the atomic mass of the element, giving your answer to 4 significant figures. Identify the element.
87.62, Sr
Which of the following ions is the most likely to be found in practice:
Fe2-
Sr2+
P3+
Pb4-
Sr2+
You own a mini-cupcake shop and must consider your inventory. You currently have 8
50.0-lb bags of flour. Your mini-cupcake recipe requires 5.00 cups of flour and makes
173 mini-cupcakes. 1 pound of flour is 4.00 cups of flour. On average, each customer
purchases 78 mini-cupcakes. How many customers can you serve with your current stock
of flour? Round to the nearest whole number of customers
710 people
What is the shorthanded electron configuration of Bi (atomic number 83)
[Xe]6s24f145d106p3
A 575 ft3 backyard swimming pool is filled by a hose with water in 3.45 hours. How long in minutes will it take to fill a kiddie pool that is 2.00 m by 2.00 m by 0.850 m with the same water hose? Give your answer to 3 significant figures. 1 m = 3.281 ft
43.2 min
On earth, chlorine has two naturally occurring isotopes. Cl-35 with a mass of 34.9689 amu and Cl-37 with a mass of 36.9659 amu. What mass of Cl-35 will be in a sample of chlorine that is 41.24 grams? What mass of Cl-37 will be in a sample of chlorine that is 41.24 grams?
Cl-35 = 31.31 g
Cl-37 = 9.93 g
Which of the following is the biggest ion?
S2-
K+
Cl-
Ca2+
S2-
After seeing a physician, a patient decides to add regular exercise and adjust his daily
calorie intake to lose 24.3 lbs of body fat. If 1.00 lb of body fat is lost for every 1.46 x
104 kJ of energy burned beyond what is consumed, how many days will it take for the
patient to meet his goal if he burns an additional 412 Calories per day than he consumes?
Give your answer rounded to the nearest day.
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1 calorie (cal) = 4.184 J ; 1 Cal = 1000 cal
206 days
What is the angular momentum number for the last electron in Hf (atomic number 72)
2