CHEM HESI A2 EXAM QUESTIONS

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CHEM HESI A2 EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -43 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: chemical equations are written In which manner?

Answer:

reactants ? products Question 2: chemical reactions in living systems proceed along catabolic pathways, and there tends to be an increase in what?

Answer:

entropy

Question 3: what describes an ionic bond?

Answer:

it does not share electrons

Question 4: use of the periodic table allow prediction for

Answer:

the properties if each of the elements

Question 5: what is the correct formula magnesium chloride?

Answer:

MgCl2

Question 6: what are monosaccharides

Answer:

the simplest form of carbohydrates

Question 7: In a redox reaction, what describes reduction?

Answer:

it is the gain of electrons

Question 8: chemical bonding is the bonding of what?

Answer:

one atom to another atom

Question 9: what material has the smallest specific heat?

Answer:

aluminum Question 10: What is the name for the reactant that is entirely consumed by the reaction?

Answer:

limiting reactant Question 11: an experiment is preformed to measure the temperature of boiling water at sea level. the actual boiling point Is 104.6, l04.5, 104.4 decrees Celsius. what describes the data?

Answer:

precise

Question 12: beta radiation is the emission of what?

Answer:

an electron

Question 13: what describes carbohydrates

Answer:

they serve as fuel for the body

Question 14: what is the name for the horizontal rows of the periodic table?

Answer:

periods

Question 15: how could water be boiled at room temp?

Answer:

by lowering the pressure

Question 16: what is the SI unit of energy?

Answer:

joule Question 17: what is the name of the device that separates gaseous ions by their mass- to - charge ratio?

Answer:

mass spectrometer

Question 18: what is another name for aqueous HI?

Answer:

hydriodic acid Question 19: what is the correct way to write iodine (I) with an atomic mass of 131?

Answer:

131I

Question 20: what are alkaline solutions? (bases)

Answer:

hydrogen acceptors

Question 21: what will one liter of a one molar solution of any element contain?

Answer:

the atomic mass in grams of that element

Question 22: what are acids?

Answer:

hydrogen donors

Question 23: what is the name of protons in an atom?

Answer:

atomic number Question 24: A catalyst is a substance that accelerates a reaction by which of the following?

Answer:

finding an alternate pathway for a reaction that requires less energy

Question 25: what does not exist as a diatomic molecule?

Answer:

boron Question 26: The reaction 2C2H6R + 7O2 -> 4CO2 +6H2O has ratio of 2 parts ethane (C2H6) and

• parts oxygen (O2). How many parts of ethane (C2H6) will be needed to react with 21 parts of

oxygen (O2)?

Answer:

• parts of ethane (C2H6)

Question 27: what element is an alkali metal

Answer:

rubidium

Question 28: what is atomic number

Answer:

number of protons