A heating curve has two flat lines, or plateaus. What does the plateau at the higher temperature represent?

1. Boiling of a liquid

2. Melting of a solid

3. Increase in temperature of a substance

4. Decrease of a substance

The rock cycle is a continuous process that changes materials found

How are independent and dependent variables related?

Why is water called the universal solvent

A compounds empirical formula is CH2. If the formula mass is 28 g/mol, what is the molecular formula

The mass of an object is the ___. A) amount of matter it contains B) amount of space it takes up C) amount of water it displaces D) force of gravity acting on it

In order for a solute to dissolve in a solvent, what must be true?

Radiocarbon dating can be used to determine the age of A a sample less than a million years old B a sample less than 100,000 years old C a sample less than 50,000 years old - D a sample less than five million years old

How many electrons in an atom can have each of the following quantum number or sublevel designations? (a) 4p (b) n = 3, l = 1, m1 = + 1 (c) n = 5, l = 3

Could the two aqueous solutions be identified through a visual inspection? Explain.

The reaction, C2H6) (l) + 3) 2 (g) produces 2CO2 (g) + 3H2) (g), is the combustion of ethanol. What occurs as the reaction proceeds.