General Chemistry Flashcards
7 cards from real OAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 General Chemistry flashcards as text
Which of the following is the correct electron configuration for Fe²⁺?
Answer: [Ar] 3d⁶
Fe is [Ar]3d⁶4s²; Fe²⁺ loses the two 4s electrons first, giving [Ar]3d⁶.
The Nernst equation is used to calculate:
Answer: Cell potential under non-standard conditions
The Nernst equation relates cell potential to concentration: E = E° - (RT/nF)ln(Q).
Which of the following statements about enthalpy (ΔH) is correct?
Answer: ΔH of formation for an element in its standard state is zero
By definition, the standard enthalpy of formation for any element in its standard state is zero.
In the reaction 2H2O2 → 2H2O + O2, hydrogen peroxide acts as:
Answer: Both an oxidizing and reducing agent
H2O2 undergoes disproportionation: one molecule is oxidized (O goes from -1 to 0) and another is reduced (O goes from -1 to -2).
Which of the following acids is considered a strong acid?
Answer: Nitric acid (HNO3)
Nitric acid (HNO3) is one of the seven strong acids that dissociate completely in aqueous solution.
What is the de Broglie wavelength of a particle?
Answer: Inversely proportional to its momentum
The de Broglie wavelength λ = h/mv, so wavelength is inversely proportional to momentum (mv).
Which of the following compounds exhibits the greatest degree of ionic character?
Answer: NaCl
NaCl has the greatest ionic character because it involves a metal and nonmetal with a large electronegativity difference.