Chemistry 132 ACS exam study notes Questions and Correct Answers/ Latest Update / Already Graded

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Chemistry 132 ACS exam study notes
Questions and Correct Answers/ Latest
Update / Already Graded
Where is the mass number located on an element symbol?

Ans: the superscript


Mass number

Ans: protons + neutrons


Where is the atomic number located on an element symbol?

Ans: the subscript


Atomic number

Ans: number of protons


Isotopes

Ans: elements with different numbers of neutrons


How to solve for an empirical formula


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Ans: Assume percentages are grams, convert to moles, divide
each number by the smallest number of moles to get subscripts


On an electromagnetic spectrum, which side has the highest energy
level?

Ans: Left


Electron orbitals are (closer together / farther apart) the further they
are from the nucleus

Ans: closer together


Tetrahedral angle

Ans: 109.5°


What groups are often tetrahedral?

Ans: 4 and 14


Trigonal planar angle

Ans: 120°




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What groups are often trigonal planar?

Ans: 3 and 13


What element is usually in trigonal planar atoms and why?

Ans: boron, because it is an exception to the octet rule


Trigonal pyramidal angle

Ans: 107°


What groups are often trigonal pyramidal?

Ans: 5 and 15


Bent angle for H2O

Ans: 104.5°


Bent angle for not H2O

Ans: 109.5°


What groups are often bent?


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