Basics of Chemistry
Unit conversions
Reporting Measures
Moles
Atoms & Elements
100
What are the particles that make up of an atom (and their charges and relative masses)
Proton (+) Mass = about 1 Neutron (0) Mass = about 1 Electron (-) Mass = 0.0005
100
Always write your ___ after values in a problem
units
100
How many Significant Figures are in the number 2.7000
2 Sig Figs (trailing zeros AFTER the decimal are significant bc they show precision)
100
6.022x10^23
What is Avogadro's Number
100
Two elements can form two different compounds but their mass ratio will increase in small whole # ratios.
What is the Law of Multiple Proportions
200
Something more "powerful" than a law that explains many observations
What is a Theory
200
1 ml is = ___
1 ml = 1 cm^3
200
Line up the decimal points, round the final answer to the last decimal place filled in all "given" numbers.
What is the rule for ADDING Sig Figs
200
A mole = the # of ___ in ___g of ___
The # of atoms in 1g of Carbon
200
Mass to mass ratios remain constant in a certain chemical compound
What is the Law of Definite Proportions
300
Carefully pouring off
What is Decanting
300
mass/volume
What is Density
300
Round the final answer so that Sig Figs match the "given" number with the fewest Sig Figs.
What is the rule for MULTIPLYING sig figs
300
Find how many moles in 0.52g Carbon
0.043 moles of Carbon
300
What predictable ions are formed by elements in groups 1A, 2A, 7A, and 6A
1+, 2+, 1-, 2-
400
What are the SI units for length, mass, time, and temperature
meter (m), kilogram (kg), second (s), and Kelvin (K)
400
Write the Order of Magnitude for 4.36x10^6 and 5.982x10^7
4.36x10^6 => 10^6 (decimal part of # is <5 so drop it) 5.982x10^7 => 10^8 (decimal part is =5 or >5 so round to 10 and rewrite)
400
Write the following numbers in scientific notation: 0.00075, 2130
7.5x10^-4, 2.13x10^3
400
Find the number of atoms in 5.5g of Nitrogen.
2.360624x10^23 atoms
400
Determined charge of single electron
What is Milikan's Oil Drop experiment
500
How do you use Dimensional Analysis to solve a problem? (equation)
Given unit x Conversion Factor (desired unit/given unit) = desired unit
500
Name the exponent form for the following prefix multipliers: micro, milli, centi, deci, kilo
micro = 10^-6 milli = 10^-3 centi = 10^-2 deci = 10^-1 kilo = 10^3
500
Draw two targets, one with marks that represent PRECISION and the other with marks that represent ACCURACY
Precision = reliability of experimental #'s (reproduce-able). Accuracy = closeness to expected value
500
Find the molar mass of NaHCO₃
84.007 g/mol
500
Isotopes differ in the number of ___
Neutrons
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