Hesi A2 Chemistry With 40 Questions & Answers 2024 ( A+
GRADED 100% VERIFIED)
1. What are all metric measurements composed of?: metric prefix and a basic unit of
measure
2. What is the most commonly used temperature scale in the scientific community?:
Celsius or Centigrade
3. The nucleus of an atom contains or is made up of: Protons and neutrons
4. What is an atom that has a positive charge called?: A cation
5. In the periodic table, what are the rows called?: Periods
6. What is the atomic number?: Number of protons
7. Which of the following describes the atomic mass?: Average mass of that element's
isotopes
8. Chemical equations are written in which manner?: Reactants --> Products
9. What is the charge on potassium in the compound KCl?: +1
10. A catalyst is a substance that accelerates a reaction by: Finding an alternate
pathway for a reaction that requires less energy
11. Percent concentration of a solution is expressed as: Parts per 100 parts
12. 1What will one liter of a one molar solution of any element contain: The
atomic mass in grams of that element
13. Chemical bonding is the bonding of: One atom to another atom
14. Describe an ionic bond: It does not share electrons
15. The reaction 2C2H6 + 7O2 --> + 6H2O has a ratio of 2 parts ethane (C2H6) and
7 parts oxygen (O2). How many parts of ethane (C2H6) will be needed to react
with 21 parts of oxygen (O2)?: 6 parts of ethane C2H6
16. What is the concentration of 58.5 g of NaCl in 2 L of solution (atomic weights of
each element are as follows: Na= 23g/mol, Cl= 35.5 g/ mol): 0.5 mol NaCl
17. In the redox reaction, which describes reduction: It is the gain of electrons
18. What are acids: Hydrogen donors
19. What is a benefit of water's ability to make hydrogen bonds?: High specific heat
20. What are bases or alkaline solutions?: Hydrogen acceptors
21. Chemical reactions in living systems proceed along catabolic pathways, and
there tends to be an increase in: Entropy
GRADED 100% VERIFIED)
1. What are all metric measurements composed of?: metric prefix and a basic unit of
measure
2. What is the most commonly used temperature scale in the scientific community?:
Celsius or Centigrade
3. The nucleus of an atom contains or is made up of: Protons and neutrons
4. What is an atom that has a positive charge called?: A cation
5. In the periodic table, what are the rows called?: Periods
6. What is the atomic number?: Number of protons
7. Which of the following describes the atomic mass?: Average mass of that element's
isotopes
8. Chemical equations are written in which manner?: Reactants --> Products
9. What is the charge on potassium in the compound KCl?: +1
10. A catalyst is a substance that accelerates a reaction by: Finding an alternate
pathway for a reaction that requires less energy
11. Percent concentration of a solution is expressed as: Parts per 100 parts
12. 1What will one liter of a one molar solution of any element contain: The
atomic mass in grams of that element
13. Chemical bonding is the bonding of: One atom to another atom
14. Describe an ionic bond: It does not share electrons
15. The reaction 2C2H6 + 7O2 --> + 6H2O has a ratio of 2 parts ethane (C2H6) and
7 parts oxygen (O2). How many parts of ethane (C2H6) will be needed to react
with 21 parts of oxygen (O2)?: 6 parts of ethane C2H6
16. What is the concentration of 58.5 g of NaCl in 2 L of solution (atomic weights of
each element are as follows: Na= 23g/mol, Cl= 35.5 g/ mol): 0.5 mol NaCl
17. In the redox reaction, which describes reduction: It is the gain of electrons
18. What are acids: Hydrogen donors
19. What is a benefit of water's ability to make hydrogen bonds?: High specific heat
20. What are bases or alkaline solutions?: Hydrogen acceptors
21. Chemical reactions in living systems proceed along catabolic pathways, and
there tends to be an increase in: Entropy
