Earthquake foci (Focus, singular) are ...

1) More than 200 miles

2) 0-50 miles deep

3) Deep 50-200 miles deeo

4) All the above

What affects the rates of reactions? describe each. a. b.?

A solution must always consist of a solid substance dissolved in a liquid. True False

Density is a physical property that relates the mass of a substance to its volume. Calculate the density, in g / mL, of a liquid that has a mass of 0.175 g and a volume of 0.000225 L.

Which substance has the highest viscosity? hot water room temperature water room temperature olive oil hot olive oil

Which of the following Group 2 elements has the lowest first ionization energy? (1) Be (3) Ca (2) Mg (4) Ba

How many Joules of energy are required to change 10.0 gram of ice at - 2.0 C to water at 20.0 C? (use your constants) 440 J 66,000 J 880 4220 J

Why are Van der Waals forces important? A) They determine how strong dipole moments will be in polar covalent molecules B) They are the strongest type of intermolecular force that can act on polar and non-polar molecules C) They are primary

When heat is added to or removed from a substance, it may change its state. What state will most likely result if heat is added to a liquid?

Chemical Reactions Lab Procedures: 1. Place a 1cm long piece of white chalk in a clear plastic cup. 2. Add 5 mL of vinegar to the cup. 3. Record your observations. If you were performing the procedures above you would need to A.

How many moles of oxygen are in 0.53 moles of co 22?