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WorksheetsChemistry Quiz
Total questions: 12
Worksheet time: 3hrs 46mins
Which of the following is NOT a step in gravimetric analysis?
Precipitation
Titration
Filtration
Drying
Bohr’s model of the atom was successful in explaining:
The spectra of multi-electron atoms
The shape of electron orbitals
The quantization of electron energy levels in hydrogen
The uncertainty principle
Which of the following elements has the highest electronegativity?
Sodium
Carbon
Oxygen
Fluorine
The wavelength of light emitted when an electron transitions from n=3 to n=2 falls in which region of the electromagnetic spectrum?
Infrared
Ultraviolet
visible
X-ray
In the reaction: 2H₂ + O₂ → 2H₂O, which substance is the oxidizing agent?
H₂
O₂
H₂O
None
What is the standard enthalpy change of formation (ΔHf°) of an element in its most stable form?
0 kJ/mol
1 kJ/mol
-100 kJ/mol
Depends on the element
Compare the Bohr model and the quantum mechanical model of the atom. What key improvements does the quantum model offer?
Explain two possible sources of error in gravimetric analysis and how they affect the final result.
Does Bohr’s model correctly explain the spectra of all elements in the periodic table?
Yes
No
Can the dilution formula M1V1=M2V2M_1V_1 = M_2V_2M1V1=M2V2 be used to find the final concentration after mixing two different solutions?
Yes
No
A sample contains 1.25g of Cl⁻ ions, and the total sample mass is 5.00g. What is the %Cl⁻ in the sample?
25.0%
12.5%
30.0%
25.5%
What is the ionization energy of a hydrogen atom in its ground state?
2.18 × 10⁻¹⁸ J
1.097 × 10⁷ m⁻¹
13.6 eV
6.022 × 10²³ J
