New Hampshire NH SAS Science - High School Practice Questions - New Hampshire Statewide Assessment System Science - High School (Second Year of High School) Exam - New Hampshire NH SAS Science - High School Practice Questions - New Hampshire Statewide Assessment System Science - High School (Second Year of High School) Exam

Question 1

A student stirs powdered calcium carbonate into 50 mL of dilute hydrochloric acid and observes bubbles of carbon dioxide. Which change to the reaction conditions would most directly increase the rate of gas production by increasing the frequency of effective collisions between reacting particles?

Grinding the calcium carbonate into a finer powder before adding it Cooling the acid to 5 °C before adding the carbonate Using a larger flask with the same volumes of acid and carbonate Diluting the acid with an equal volume of water

Correct Answer:

Grinding the calcium carbonate into a finer powder before adding it

Question 2

In the reaction 2 H2 + O2 → 2 H2O, how many molecules of water can be produced when 4 molecules of hydrogen react completely with 1 molecule of oxygen?

2 molecules of water 4 molecules of water 6 molecules of water 8 molecules of water

Correct Answer:

2 molecules of water

Question 3

A chemist needs 0.500 mol of sodium chloride for a solution. Using Avogadro's number (6.02 × 10^23 particles per mole), how many formula units of NaCl should the chemist measure out?

3.01 × 10^23 formula units 1.20 × 10^24 formula units 6.02 × 10^23 formula units 3.01 × 10^24 formula units

Correct Answer:

3.01 × 10^23 formula units

Question 4

Which statement best explains why sodium (Na, group 1) and chlorine (Cl, group 17) form the ionic compound NaCl with a 1:1 ratio rather than covalent molecules?

Sodium readily donates one electron and chlorine readily accepts one electron, giving both a filled outer shell. Sodium and chlorine share a pair of valence electrons equally between the two atoms. Sodium accepts seven electrons from chlorine to complete its outer shell. Both atoms have equal electronegativity, so neither attracts the bonding electrons more strongly.

Correct Answer:

Sodium readily donates one electron and chlorine readily accepts one electron, giving both a filled outer shell.

Question 5

Moving from left to right across a period in the periodic table, atomic radius generally decreases. Which factor best accounts for this trend?

Increasing nuclear charge pulls the same-energy-level electrons closer to the nucleus. Adding electron shells increases the distance of outer electrons from the nucleus. Electrons are removed as you move right, reducing atomic size. Atomic mass increases, so atoms become physically heavier and smaller.

Correct Answer:

Increasing nuclear charge pulls the same-energy-level electrons closer to the nucleus.

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Prepare with the New Hampshire NH SAS Science - High School Practice Questions - New Hampshire Statewide Assessment System Science - High School (Second Year of High School) Exam practice quiz. This question bank includes 100 questions covering energy, light, explains, change, and describes. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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New Hampshire NH SAS Science - High School Practice Questions - New Hampshire Statewide Assessment System Science - High School (Second Year of High School) Exam

This practice set contains 100 questions from the matching question bank and focuses on energy, light, explains, change, and describes. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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New Hampshire NH SAS Science - High School Practice Questions - New Hampshire Statewide Assessment System Science - High School (Second Year of High School) Exam

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