HESI A2 CHEMISTRY NURSE HUB EXAM QUESTIONS

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HESI A2 CHEMISTRY NURSE HUB EXAM QUESTIONS

Qs and Ans Expert- Explanation

This Exam contains:

-Guarantee passing score -100 Questions and Answers -format set of multiple-choice -Expert- Explanation Question 1: In a redox reaction, oxidation is the _______ of electrons and reduction is the _______ of electrons.

Answer:

loss, gain Question 2: Which of the following pairs would result in an acid-base neutralization reaction?

Answer:

KOH + H2SO4

Question 3: Which element on the periodic table has 8 protons?

Answer:

Oxygen

Question 4: Which of the following best describes a cation?

Answer:

An atom that has more protons than electrons

Question 5: Which option correctly converts

4.51 × 10-5

to standard notation?

Answer:

0.0000451

Question 6: Which of the following options represents the SI base unit of mass?

Answer:

Kilogram Question 7: Which of the following phase transition describes the change from ice into steam?

Answer:

Sublimation

Question 8: Which of the following describes a non-polar covalent bond?

Answer:

An even sharing of electrons between atoms Question 9: What generally happens to a reaction when the temperature increases?

Answer:

The reaction rate increases.Question 10: Normal body temperature is considered to be 98.6oF. What is the normal body temperature in degrees Celsius?

Answer:

37° C

Question 11: Lemon juice contains citric acid. Which of the following pH values would lemon juice most likely have?

Answer:

2

Question 12: Which option is the correct scientific notation of 734,000,000?

Answer:

7.34 x 10^8

Question 13: Which of the following elements is a halogen?

Answer:

Cl

Question 14: What two functional groups do amino acids contain?

Answer:

Carboxylic acid and amine

Question 15: Which of the following is not a polysaccharide?

Answer:

Glucose

Question 16: Which of the following is a positively-charged atom?

Answer:

Cation Question 17: When brass is created by mixing zinc and copper, what type of solution is created?

Answer:

Alloy (metal and element) Question 18: Which of the following represents the correct electron configuration for sodium (Na)?

Answer:

1s2 2s2 2p6 3s1 Question 19: Why does increasing the surface area of reactants or catalysts increase the rate of a reaction?

Answer:

It increases the likelihood of molecules encountering one another.Question 20: H2O is an example of which of the following:

Answer:

Compound

Question 21: How many neutrons does 58Cr have?

Answer:

34

Question 22: Which of the following has an ionic bond?

Answer:

NaCl Question 23: Cesium-137 has a half-life of 30 years. If a 2.0 g sample of cesium-137 decays over 120 years, how much would remain?

Answer:

0.125 g Question 24: Which of the following represents the general form of a decomposition reaction?

Answer:

AB ? A + B

Question 25: Which of the following Kelvin temperatures represents the freezing point of water?

Answer:

273.15 K

Question 26: Which of the following elements is located in period 2 of the periodic table?

Answer:

Oxygen

Question 27: Which state of matter can contain a solution?

Answer:

Solids, liquids, and gases

Question 28: What atom property determines if a bond is polar or non-polar?

Answer:

Electronegativity