Exam (elaborations)

Chemistry 101 - Exam 1 Questions And Answers Graded A+ .

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Chemistry 101

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Chemistry 101

Chemistry 101 - Exam 1 Questions And Answers Graded A+ . 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- - cor...

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Uploaded on September 27, 2024
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Written in 2024/2025
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Contains Questions & answers

chemistry 101 exam 1 questions and answers gra

Institution Chemistry 101
Course Chemistry 101

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Chemistry 101 - Exam 1 Questions And
Answers Graded A+ 2024-2025.

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 (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 - 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 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 - correct answer. How reproducible; how close the measurements are to
each other

Accuracy - correct answer. How close the measurements are to the true value

Multiplication and Division with Sig Figs - correct answer. Always use the amount of
sig figs that are in the number with the lowest amount of sig figs
Ex. 4.56cm x 1.4cm = 6.4cm squared (2 sig figs from 1.4cm)

Addition and Subtraction with Sig Figs - correct answer. Always use the same amount
of sig figs as the number with the smallest amount of decimal places
Ex. 12.11cm + 18.0cm + 1.013cm = 31.1cm (1 decimal place from 18.0cm)

Marie Curie - correct answer. Discovered radioactivity (the emission of small energetic
particles from the core of certain unstable atoms) at the end of the 19th century.
Provided evidence of subatomic particles.

J.J Thomson - correct answer. Constructed a glass tube called a cathode ray that was
partially evacuated and then applied a high electrical voltage between two electrodes at
either end of the tube. Thomson found that a beam of particles, called cathode rays,
traveled from the neg side to the pos side. J.J. Thomson measured the charge-to-mass
ratio of the cathode ray particlesy by deflecting them using electric and magnetic fields.
J.J. Thomson had discovered the electron.

Milliken's Oil Drop Experiment - correct answer. Determined the charge of the electron
and used it to figure out the weight of an electron using J.J. Thomson's charge-to-mass
ratio. Sprayed neg charged oil into small droplets into a evacuated container. As the

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