Chemistry 101 - Exam -1 WITH CORECT ANSWERS

Chemistry 101 - Exam #1 WITH CORECT
ANSWERS
K = °C + 273.15 - CORRECT ANSWER -Conversion to kelvin from celcius



Exa- - CORRECT ANSWER -Symbol: E; 10¹⁸



Peta- - CORRECT ANSWER -Symbol: P; 10¹⁵



Tera- - CORRECT ANSWER -Symbol: T; 10¹²



Giga- - CORRECT ANSWER -Symbol: G; 10⁹



Mega- - CORRECT ANSWER -Symbol: M; 10⁶



Kilo- - CORRECT ANSWER -Symbol: k; 10³



Deci- - CORRECT ANSWER -Symbol: d; 10⁻¹



Centi- - CORRECT ANSWER -Symbol: c; 10⁻²



Milli- - CORRECT ANSWER -Symbol: m; 10⁻³



Micro- - CORRECT ANSWER -Symbol: mew; 10⁻⁶



Nano- - CORRECT ANSWER -Symbol: n; 10⁻⁹

, Pico- - CORRECT ANSWER -Symbol: p; 10⁻¹²



Femto- - CORRECT ANSWER -Symbol: f; 10⁻¹⁵



Atto- - CORRECT ANSWER -Symbol: a; 10⁻¹⁸



Significant Figures Rules - CORRECT 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 (zeroesBat 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 s
cientific notation



Dalton's Atomic Theory - CORRECT 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 f
rom 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