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Straighterline CHEM101 General Chemistry I ALL EXAMS (2025/2026) QUESTIONS WITH CORRECT DETAILED ANSWERS || 100% GUARANTEED PASS!! <RECENT UPDATE> $12.99
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Straighterline CHEM101 General Chemistry I ALL EXAMS (2025/2026) QUESTIONS WITH CORRECT DETAILED ANSWERS || 100% GUARANTEED PASS!! <RECENT UPDATE>
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Course
CHEM101
Institution
CHEM101
Straighterline CHEM101 General
Chemistry I ALL EXAMS (2025/2026)
QUESTIONS WITH CORRECT DETAILED
ANSWERS || 100% GUARANTEED PASS!!
<RECENT UPDATE>
Electron affinity - ANSWER the energy change that occurs when an electron is
acquired by a neutral atom
Electronegati...
Straighterline CHEM101 General
Chemistry I ALL EXAMS (2025/2026)
QUESTIONS WITH CORRECT DETAILED
ANSWERS || 100% GUARANTEED PASS!!
<RECENT UPDATE>
Electron affinity - ANSWER ✔ the energy change that occurs when an electron is
acquired by a neutral atom
Electronegativity - ANSWER ✔ A measure of the ability of an atom in a chemical
compound to attract electrons
Chemical bonding - ANSWER ✔ The joining of atoms to form new substances
Lewis structure - ANSWER ✔ A model that uses electron-dot structures to show
how electrons are arranged in molecules. Pairs of dots or lines represent bonding
pairs.
Molecule - ANSWER ✔ A group of atoms bonded together
Molecular shape - ANSWER ✔ determines how biological molecules recognize
and respond to one another
,VSPER - ANSWER ✔ Valence Shell Electron Pair Repulsion
Electron pair - ANSWER ✔ two electrons occupying the same orbital in an atom
or molecule
Electron domain - ANSWER ✔ a lone pair or a bond, regardless of whether the
bond is single, double, or triple
Bonding e- domain - ANSWER ✔ These are e- directly involved in covalent
bonds between 2 atoms
Non-bonding e- domain - ANSWER ✔ these are iome e- pairs
SI units - ANSWER ✔ a system of physical units ( SI Units ) based on the meter,
kilogram, second, ampere, kelvin, candela, and mole, together with a set of
prefixes to indicate multiplication or division by a power of ten.
Unit conversion - ANSWER ✔ The process of changing one unit of measure to
another.
Temperature scales - ANSWER ✔ Fahrenheit, Celsius, Kelvin
Scientific notation - ANSWER ✔ a method of expressing a quantity as a number
multiplied by 10 to the appropriate power
Positive exponent - ANSWER ✔ move decimal to the right
,Negative exponent - ANSWER ✔ take the reciprocal and change the exponent to
positive
Determine error - ANSWER ✔ comes from lack of experience or ability
Rules for recording significant figures - ANSWER ✔ Non-zero digits are always
significant.
All zeros between other significant digits are significant.
The number of significant figures is determined by starting with the leftmost non-
zero digit. The leftmost non-zero digit is sometimes called the most significant
digit or the most significant figure. For example, in the number 0.004205, the '4' is
the most significant figure. The left-hand '0's are not significant. The zero between
the '2' and the '5' is significant.
Rules for rounding significant figures - ANSWER ✔ 1. If the digit to the right of
the last sf is less than 5, do not change the last sf (2.532->2.53)
2. If the digit to the right of the last sf is greater than 5, round up the last sf (2.536-
>2.54)
(3+4-rule of 5-even)
3. If the digit to the right of the last sf are a 5 followed by a nonzero digit, round up
the last sf (2.531->2.54)
4. If the digits to the right of the last sf are a 5 followed by a 0 or no other number,
look at the last sf. If it is odd, round it up; if it is even, do not round up (2.5350-
>2.54 or 2.5250->2.52)
Significant figures and math operation - ANSWER ✔ rules for multiple operation
and division, the results should have the same kind of sig figures as the number
with the fewest amounts of sig
Rules for addition and subtraction - ANSWER ✔ the answer has the same number
of decimal places as the original number with the fewest decimal places
, Photoelectric effect - ANSWER ✔ - demonstrates the particle nature of light
- an electron can be ejected from the surface of a metal by shining light of a certain
frequency on it
- only occurs when the incoming light (*photon*) overcomes the *work function*
(minimum energy to eject he electron)
Polar covalent bond - ANSWER ✔ - occurs when 2 atoms of electronegativity
form a covalent bond
- the electrons are not shared equally
- contains a dipole (µ)
Dipole moment - ANSWER ✔ - points to the more electron rich (δ-) region
- has magnitude and direction (vector)
Pure covalent bonds - ANSWER ✔ - occurs when 2 atoms are identical
- electronegativity difference is zero so electrons are shared equally
Symmetric covalently-bonded molecules - ANSWER ✔ - no net dipole moment
- individual dipoles cancel out in 3D space
Intermolecular bonding - ANSWER ✔ - the weak interactions between molecules
- London dispersion forces (induced-dipole-induced-dipole)
- dipole-dipole forces
- hydrogen bonding
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