Exam (elaborations)
Chemistry 101 - Exam -1(solved & updated)
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Chemistry 101 - Exam -1(solved & updated)
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Chemistry 101 -Exam #1(solved
& updated)
K = °C + 273.15 - answer Conversion to kelvin
from celcius
Exa- - answer Symbol: E; 10¹⁸
Peta- - answer Symbol: P; 10¹⁵
Tera- - answer Symbol: T; 10¹²
Giga- - answer Symbol: G; 10⁹
Mega- - answer Symbol: M; 10⁶
Kilo- - answer Symbol: k; 10³
,Deci- - answer Symbol: d; 10⁻¹
Centi- - answer Symbol: c; 10⁻²
Milli- - answer Symbol: m; 10⁻³
Micro- - answer Symbol: mew; 10⁻⁶
Nano- - answer Symbol: n; 10⁻⁹
Pico- - answer Symbol: p; 10⁻¹²
Femto- - answer Symbol: f; 10⁻¹⁵
Atto- - answer Symbol: a; 10⁻¹⁸
Significant Figures Rules - answer 1) All nonzero
digits are significant (not true; can be broken up
into subatmoic particles [protons, neutrons, &
electrons])
2) Interior zeroes (zeroes between 2 non-zero
digits) are significant (not true because of
isotopes)
, 3) Leading zeroes (zeroes to the left of the first
non-zero digit) are not significant
4) Trailing zeroes (zeroes at the end of a number)
are categorized as follows:
-Trailing zeroes after a decimal point are always
significant
-Trailing zeroes before a decimal point (and after a
non-zero number) are always significant
-Trailing zeroes before an implied decimal point are
ambiguous and should be avoided by using
scientific notation
Dalton's Atomic Theory - answer 1) Each element
is composed of tiny, indestructible particles called
atoms
2) All stoms of a given element have the same
mass and other properties that distinguish them
from the atoms of other elements
3) Atoms combine in simple, whole-number ratios
to form compounds
4) Atoms of one element cannot change into atoms
of another element. In a chemical reaction, atoms
only change the way that they are bound together
with other atoms
Precision - answer How reproducible; how close
the measurements are to each other
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