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HESI A2 CHEMISTRY NURSE SHAI EXAM QUESTIONS
Qs and Ans Expert- Explanation
This Exam contains:
-Guarantee passing score -63 Questions and Answers -format set of multiple-choice -Expert- Explanation
Question 1: chemistry term of Substance
Answer:
a specific type of matter that has a definite composition and distinct properties.
Question 2: which radioactive wave can be stopped by a sheet of paper ?
Answer:
alpha Question 3: which radioactive can travel through most substances including concrete and lead .
Answer:
gamma Question 4: __ is the state in which reactants are forming products at the same rate that products are forming reactants .
Answer:
chemical Equilibrium
Question 5: __ proteins found in living organism that catalyze biological reactions.
Answer:
enzymes Question 6: calculate the molarity of a solution prepared by dissolving 25 grams of potassium chloride (KCI) in enough water to make 500 mL of solution
Answer:
0.671 M
Question 7: a mole contains __ number of particles
Answer:
6.02 x 10^23
Question 8: the pH level for bleach is
Answer:
13
Question 9: considering the periodic table every box contains __
Answer:
the element symbol, atomic number, and atomic mass
Question 10: a solution with a pH of 3 is consider to be an __
Answer:
acidic
Question 11: transitional metals are located
Answer:
the very bottom last slide of periodic table Question 12: which of the following is the process that changes a solid element to a gas ?
Answer:
sublimation
Question 13: which value does scientific notation 1.4 x 10^5 represent ?
Answer:
140,000
Question 14: what are the three parts of an atom ?
Answer:
protons, neutrons, and electrons Question 15: one of the characteristics properties of a basic is that it decreases the concentration of __.
Answer:
hydrogen ions
Question 16: lemon juice has a pH of
Answer:
2
Question 17: the three states of matter
Answer:
soda, ice, and CO
Question 18: the scientific notation 2.3 x 10^-3 represents ?
Answer:
0.0023
Question 19: change temp of 5 C into kelvin
Answer:
278.15 K
Question 20: the temp at which all molecular movement stops ?
Answer:
- degree celsius
Question 21: when two atoms of the same elements has two different mass numbers it is called
Answer:
isotope
Question 22: identify the atomic particle(s) with a positive charge.
Answer:
neutrons
Question 23: which chemical bond has the ability to conduct electricity ?
Answer:
metallic bonding
Question 24: the element radium (Ra) is considered to be an __
Answer:
metal
Question 25: a glucose and oxygen reactant
Answer:
C6 H12 O6 + 6O2 >> 6 CO2 + 6H2O Question 26: how many moles of sodium chloride (NaCI) are present in 75 grams of the compound
Answer:
1.28 moles
Question 27: when two atoms share electrons it is called __.
Answer:
covalent (bonding) Question 28: how many neutrons does boron has ? (boron has an atomic number of 5 molar mass is 10.811)
Answer:
5
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