Chapter 5
Mixed
Mole Conversions
Vocabulary
Periodic table
100
_____ ______ are groups of atoms held together by covalent bonds.
Molecular Compounds
100
Molecular compounds generally form from ______ atoms.
nonmetals
100
What are the steps to finding how many moles are in 450.0 g of H2O. Find the answer
450.0 g * 1 mol 450.0 g divided by 18.02 25.00 H2O
100
What is Empirical formula?
Formula of a compound that has been simplified or expresses the smallest wholenumber ratio of atoms in a compound.
100
A law that states that when the elements are arranged in order of increasing relative mass, certain sets of properties recur periodically. What is it?
Periodic Law
200
What are a group of atoms called?
Molecule
200
Ionic compounds generally form between what 2 metals?
Metal and nonmetal
200
Find the mass of 8.90*10^45 molecules of water. (Particles-->Mole-->Grams)
2.66*10^23 g/H2O
200
When you see mass or grams, what do you use?
Molar mass
200
The group 2A elements, which are fairly reactive metals. What is this group called?
Alkaline earth metals
300
What is a covalent bond?
Attraction between neutral atoms that share electrons
300
What kind of compound is water?
molecular
300
What volume in liters would 23.5 moles of CO2 gas occupy? (Mole-->Liters)
526 L CO2
300
What is avogadro's #? and when do you use it?
6.02*10^23 and when you see formula units, atoms and molecules
300
What is atomic mass?
A weighted average of the masses of each naturally occuring isotope of an element; atomic mass is the average mass of the atoms of an element.
400
Individual ions arranged in crystals held together by ionic bonds are called?
Ionic Compound
400
What 6 elements always exist as diatomic molecules?
N2, O2, F2, Cl2, Br2, I2
400
Calculate the mass of 12.2 mol of carbon tetrachloride, CCl4. (Mole-->Grams)
880 g CCl4 or 1.88*10^3 g CCl4
400
What are polyatomic ions?
A charged group of covalent bonded atoms.
400
Elements have the same what?
Protons and electrons
500
Attractions between positive and negative charges.
Ionic Bonds.
500
_______ _______, a molecular representation that shows both the connections among atoms and the locations of lone-pair valence electrons.
Lewis Structure
500
If a sample of calcium has a mass or 13.3 g, how many atoms of calcium are present? (Grams-->Mole-->Particles)
2.00*10^23 Ca
500
What is Chemical Bonding?
A mutual electrical attraction between the nuclei and the valence electrons of different atoms that binds the atoms together.
500
How many valence electrons does helium, neon, argon, krypton, xenon, and radon have?
8 Valence Electrons
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