HESI A2 Version 1 Chemistry

Correct Answer: C

Rationale: The correct answer is C: Neutral. A pH of 7 is considered neutral on the pH scale, which ranges from 0 to 14. A pH of 7 indicates a balance between acidic and basic properties in a solution, making it neither acidic nor basic. Values below 7 are acidic, above 7 are basic, and 7 is the midpoint representing neutrality. Therefore, a solution with a pH of 7 is neutral.

Correct Answer: B

Rationale: Chemical equations are typically written with reactants listed on the left side of the arrow and products on the right side. This convention signifies the progression of reactants transforming into products during a chemical reaction. Therefore, the correct way chemical equations are typically written is 'Reactants ā†’ Products.'

Correct Answer: A

Rationale: The periodic table serves as a fundamental tool in chemistry, organizing elements based on their atomic number, electron configuration, and recurring chemical properties. Through the arrangement of elements, one can predict various properties of each element. Periodic trends such as atomic radius, electronegativity, and ionization energy allow for the anticipation of element characteristics like reactivity, boiling point, and other physical and chemical properties. Hence, the correct answer is A: The properties of each of the elements can be successfully predicted using the periodic table.

Correct Answer: A

Rationale: The correct answer is a mass spectrometer. A mass spectrometer is a device specifically designed to separate gaseous ions based on their mass-to-charge ratio. The separation occurs as ions pass through the mass spectrometer, allowing for the identification and quantification of compounds present in a sample. This analytical instrument is widely used in chemistry and other scientific fields due to its ability to provide detailed information about the composition of substances.