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WorksheetsAP Chem Unit 1 Review (Long)
Total questions: 36
Worksheet time: 49mins
A compound contains 1.00 mol of Sb. 1.50 mol C and 4.50 mol of O What is the empirical formula?
SbCO
Sb2C3O9
SbC1.5O4.5
SbC3O9
Based on this mass spectrum, how many isotopes does Mercury have?
1
3
5
7
Determine the number of significant figures in 0.0019670
(a)
What is the molar mass for Na2O to 4 sig. figs. Do not include units.
(a)
What is the molar mass of HgHCO3
229.61 g/mol
287.65 g/mol
378.40 g/mol
261.6 g/mole
Which arrow points to a neutron?
Arrow A
Arrow B
Arrow C
Arrow D
Which shows the proper set up to calculate how many oxygen atoms are present in 20g of Ca(NO3)2
(20/164)×(6/1)×(6.02×1023)
(20/164)×(1/6)×(6.02×1023)
(164/20)×(6/1)×(6.02×1023)
(20/164)×(6/1)
How many valence electrons are in this atom? Enter just a number (The element in the picture has 13 p+, 14 n0, 14e- in 2:8:3 order on 3 rings)
(a)
Select all of the true statements
(The element in the picture has 13 p+, 14 n0, 14e- in 2:8:3 order on 3 rings)
This element has 13 electrons in total
This element forms a +13 ion
This element has a mass of 27
This element is in the 3rd period
This element is in Group 15
Which of the following nickle compounds contains the highest percentage nickle by mass?
NiCl2
NiO2
NiO
Ni3(PO4)2
A compound has the molecular formula of PBr5, it has a molecular formula mass of 431 g/mol. What is the molecular formula of this compound?
P2Br10
PBr5
P3Br15
P4Br20
Select all of the empirical formulas from this list.
CH2
C3H6
C5H10P
Na2O2
C4H8P2
For the compound whose formulas is C4H8P2, enter the mass % for Hydrogen, to 3 Sig. Figs. Enter just a number for your answer.
(a)
For the compound whose formulas is C3H6O, enter the mass % for Carbon, to 3 Sig. Figs. Enter just a number for your answer.
(a)
What is the mass of Na2CO3⋅7H2O
105.99 g/mol
741.963 g/mol
232.13 g/mol
1183.07 g/mol
The effective nuclear charge experienced by the outermost electron of Na is different than the effective nuclear charge experienced by the outermost electrons of Ne. This difference best accounts for which of the following statements.
Na has a higher melting point than Ne.
Na has a lower first ionization energy than Ne.
Na has fewer naturally occurring isotopes than Ne.
Na has a higher neutron-to-proton ratio than Ne.
The elements in which of the following groups have most nearly the same atomic radius?
Mg, Ca, Sr, Ba
C, P, Se, I
Cr, Mn, Fe, Co
Ne, Ar, Kr, Xe
What element is this the orbital diagram and electron configuration for?
Potassium
Aluminum
Neon
Argon
The ionization energies for element X are listed in the table. On the basis of the data, element X is most likely
Na
Mg
Al
Si
Which of the following best helps to account for the fact that the F⁻ ion is smaller than the O²⁻ ion?
F⁻ has a larger nuclear mass than O²⁻ has
F⁻ has a larger nuclear charge than O²⁻ has
F⁻ has a electrons than O²⁻ has
F⁻ is more electronegative than O²⁻ is
Which of the following best explains the deviation of the 1st IE of Oxygen from the over all trend in the table
The atomic radius of O is greater than the atomic radius of F.
The atomic radius of O is less than the atomic radius of N.
There is repulsion between paired electrons in O's 2p orbitals.
There is attraction between paired electrons in O's 2p orbitals.
Which of the following lists Mg, P, and Cl in order of increasing atomic radius?
Mg < P < Cl
Cl < Mg < P
Mg < Cl < P
Cl < P < Mg
For element X, which of the following is the most likely explanation for the large difference between the 2nd & 3rd IE
The effective nuclear charge decreases with successive ionizations.
The ionic radius increases with successive ionizations.
The e⁻ removed during the 3rd IE is, on avg, much close to the nucleus.
The shielding of outer electrons increases with successive ionizations.
Determine the electron configuration for N3-
1s22s22p5
1s22s22p6
1s22s22p3
1s22s2
Which of the following is the most electronegative element?
O
La
Rb
Mg
N
The energy required to convert a ground-state atom in the gas phase to a gaseous positive ion
activation energy
free energy
ionization energy
kinetic energy
lattice energy
Which two subatomic particles are in the nucleus?
Protons and Neutrons
Protons and Electrons
Neutrons and Electrons
Using electron configuration and your knowledge of ionization energy, which would you expect to have a higher second ionization energy: Na or Mg?
Na
Mg
Both would be expected to have the same second ionization energy
Cannot be determined
1s22s22p63s23p64s23d10
How many valance electrons are seen in this PES?
2
4
6
8
Which peak corresponds to the 1s orbital for boron as seen on this PES?
Peak 1
Peak 3
Peak 3
There isn't enough information to determine this.
