What SI unit would you use to measure the length of a football stadium?
Meters
100
Give 3 pieces of evidence that a chemical reaction has occurred.
release of energy, absorption of energy, color change, formation of gas bubbles, precipitate
100
What is the reactant that determines the amount of product that can be produced called?
Limiting reagent
100
What's the difference between solids, liquids and gases?
Particle spacing
100
Name two liquids that are miscible and two that are immisicible.
Miscible- coffee and cream; water and food dye
Immisicible- water and oil/ sand and water
200
Formula for density
D=m/v
200
Why is hydrogen an exception when it comes to metals and Nonmetals?
Hydrogen is a nonmetal but acts like a metal.
200
What are three things the coefficients of a chemical equation can represent?
Atoms, molecules, moles, mass in grams, liters (for gases at STP)
200
Why does the combined gas law not work to explain how a hot air balloon rises and falls?
It is not an enclosed system.
200
What is the formula for molarity?
M= moles of solute/liters of solution
300
What two numbers must coefficients in scientific notation be in between?
1 and 9.9999
300
What are always the two products of a complete combustion reaction?
Water and carbon dioxide
300
What is the difference between a barometer and a manometer?
Barometer measures air pressure and manometer measures gas pressure in a closed container.
300
Explain Boyle's Law
As volume decreases, collisions increase and pressure increases
300
Name two differences between acids and bases.
Acids are sour and bases are bitter and slippery; acids are proton donors and bases are proton acceptors; acids have a pH of 0/6.9 and bases have a pH of 7.1-14
400
What is the density of coins that have a mass of 35.0 grams and a volume of 5.00 mL?
7.00 g/mL
400
What is Avogadro's number?
6.022x10 to the 23rd power
400
Name the three intermolecular forces.
(London) dispersion force, hydrogen bond and dipole-dipole
400
A football shrinks when it is taken outside in extremely cold weather.
Charles Law
400
What is the formula to find the pH?
pH= -log [H+ concentration]
500
What does the SI base unit candela represent?
Luminous intensity
500
What are two things 1 mole is equal to?
Element's atomic mass in grams and 22.4 Liters
500
Name the three phase changes that release energy.
Freezing, condensation, deposition
500
What variable does 8.31 kPaL/mol K represent?
R
500
Explain what a buffered solution is made of.
It is a mixture of a weak acid and its conjugate base or a weak base and its conjugate acid.