Unit 1 and 2
Unit 3 and 4
Unit 5 and 6
Unity 7 and 8
Unit 9
100
What is the ability to do work
Energy
100
._______ determines the stability of the atom
What is Neutrons
100
Draw the dot diagram for Ca〖Cl〗_2
[ca]2+ [Cl]1- [Cl]1-
100
Name the reaction of MgC0_3 MgO + CO_2
Decomposition
100
Avogadro’s number is?
22.4L
200
Convert 8.144061 Mg to dg and round to four sig figs.
8.144e7dg Explanation: 8.144061 Mg 10^7 1 Mg =8.144061810^7, rounding to four sig figs =8.144*10^7
200
Electron capture of Aluminum 26:
What is (_12^26)MG Explanation: (_13^26)AL-(_-1^0)E= (_12^26)MG
200
indicate which of the following drops would release ultraviolet light and why. N=6N=2 N=4 N=1 N=4N=2
N=4 N=1 Explanation: any drop to level one will result in light
200
Name the reaction….. of Iron (III) oxide reacts with Hydrogen gas to produce iron and water.
Single replacement Explanation: 2Fe_(2 ) O_3+ 6H_2 4 Fe + 〖6H〗_2O
200
The limiting reactant is…
The smallest number in relation to the mole ratio
300
What is The proper scientific notation for 0.000687 is-
6.87*10^-4 Explanation: move the decimal place to the right 4 times anytime you go right it becomes negative.
300
what are the quantum numbers for the 17th electron of argon?
N-3 m_s-1/2 m_l -0 l-1 explanation: Ms- is the spin n- is the period l-group Ml-the range
300
What is the frequency of light with an energy of 3.40e-19.
5.13e14hz Explanation: E=hv h=6.626e-34 E=3.40e-19 V=E/h V=3.40e-19/6.626e-34 V=5.13e14hz
300
find the percentage of salt in MgSO_4*7H_2O
48.83% Explanation: Mass of salt= 24.31+32.06+ 4(16.00)= 120.37 Mass of water= 7(18.02)=126.49 % of salt= 120.14/246.51=48.83%
300
what is the volume of 5.68 moles of butane at STP
127 L Explanation: 5.68 moles of butane 22.4 L = 127 L 1 mole of butane
400
Classify the following properties as chemical or physical, if physical is it intensive or extensive: solubility
Physical, Intensive Explanation- solubility is the ability to dissolve in water, so physical and since size doesn’t matter it is intensive
400
What atom is largest? a.Na b. K c. Rb d. cs
What is d. cs Explanation: Atomic Radius is measured by the most left and downward element
400
What is the VESPER geometry of CCLf_3
Tetrahedral Explanation: It has 4 bonds because of carbon and 0 lone pairs so it must me tetrahedral.
400
What is the empirical formula of a compound that is 79.9% carbon and 20.1% hydrogen?
C_2 H_3 Explanation: 79.9g 1 Carbon 12.01 = 6.65/6.65=1*2=2 Hydrogen 20.1 1 2.02 =9.95/6.65=1.5*2=3 C_2 H_3
400
What mass of nitrogen is required to react with 16 grams of oxygen?
5.6 g of nitrogen Explanation: 16g 1 mole 2 mol 28.02 =5.6 g 32.00g 5 mol 1 mol
500
If you live 4.2 miles from your best friend and the speed lime is 25 miles per hour, how many seconds will it take you to drive from your house to your friends house?
6.0*10^2 Explanation 4.2miles 1 hour 60 min 60 sec 25 miles 1 hour 1 min =6.0*10^2
500
The half-life of plutonium(239) is 24,100 years. If an original mass is 100g how much remains after 96,440 years.
What is 6.25 Explanation: Mo(1/2)^n=Mf T/T(1/2)=N
500
Calculate the energy associated with yellow light with a wavelength of 589nm.
3.37*10^-19J Explanation: 589nm 1 m =5.89*10^-7m 10^9 nm Frequency= light (3.00*10^8)/ wavelength 3.00e8/5.89e-7=5.09e14 E=hv E=6.626e-34*5.09e14 E=3.37e-19J
500
How many molecules are in 112.5g of dinitrogen tetroxide
7.360e23 molecules Explanation: 112.5g 1 mole 6.02e23 molecules =7.360e23 molecules 92.02 g 1 mole
500
how many grams of water will be produced if there are 3.5 moles of oxygen? 〖2H〗_2O +O_2 〖2H〗_2O
130g of water Explanation: 3.5 moles 2 moles water 18.02 g =130g of water 1 mole O 1 mole water
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