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CHEM HESI A2 EXAM QUESTIONS
Qs and Ans Expert- Explanation
This Exam contains:
-Guarantee passing score -43 Questions and Answers -format set of multiple-choice -Expert- 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 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
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