Chem basics
What is the formula for density?
Mass ÷ Volume
What particle has a positive charge
Proton
What are the starting substances in a chemical reaction called?
Reactants
What is the molar mass of H₂O
18 g/mol
What does Boyle’s Law compare?
Pressure and volume
What is the difference between a physical and chemical change
physical change does not create a new substance, while a chemical change does.
Who created the first widely accepted periodic table
Dmitri Mendeleev
Balance this equation: H₂ + O₂ → H₂O
2H₂ + O₂ → 2H₂O
What percentage formula is used for percent by mass
(Mass of solute ÷ Total mass) × 100
In Charles’ Law, what happens to volume when temperature increases
Volume increases
What property describes how shiny a metal is
Luster
What are atoms with different numbers of neutrons called
Isotopes
What is a positively charged ion called?
Cation
If density = mass/volume, what happens to density if volume increases and mass stays the same?
Density decreases
What is the formula for the Ideal Gas Law
PV = nRT
What are the three categories of elements on the periodic table
Metals, nonmetals, and metalloids
What family is found in Group 18 of the periodic table
Noble gases
What law states matter cannot be created or destroyed
Law of Conservation of Matter
What does ppm stand for?
Parts per million
What type of substances dissolve best in water
Polar substances
Is color a physical or chemical property
Physical property
What ion has more electrons than protons
Anion
In oxidation, does an atom gain or lose electrons
Lose electrons
How many grams are in 2 moles of helium if helium’s molar mass is 4 g/mol?
8 grams
What is a saturated solution
A solution that contains the maximum amount of dissolved solute possible at a certain temperature.