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Ionic/covalent bonding
Chemical formulas
Stoichiometry
Polymers
Balancing
100
What happens when two covalent atoms bond?
The two atoms share electrons so they both have a full shell of electrons.
100
How many atoms are in MoAg6Se6?
1-Mo 6-Ag 6-Se
100
How many moles are there in 1g Ni?
58.71x(1/58.693)= 0.017
100
What are polymers?
They are long chains of repeated subunits chemically bonded together by covalent bonds.
100
Whats wrong with the equation below? H2+ O2-> H2O.
Not the same amount of oxygens
200
What happens when two ionic atoms bond?
One atom gives electrons so both can have a full shell of electrons.
200
Is H2O ionic or covalent?
Ionic
200
What is the molar mass of H2O?
18.0148 g/mol H2O
200
What is the advantage that is also a disadvantage of using plastics?
It doesn’t decompose.
200
How many atoms are in H4PO4
H-4 P-1 O-4
300
Draw ClLi
(Sharing 2 electrons)
300
How many atoms are in Ca3(PO4)2?
3-Ca 2-P 8-O
300
What is one mole?
6.022 X 10^23
300
What are the subunits called?
Monomers
300
Balance C12H6 + O2-> CO2 + H2O
2C2H6 + 7O2 -> 4CO2 + 6H2O
400
Draw LiF
Li (with 2) F (with 2, 8)
400
Write the formula with 1-Mg 2-N 6-O
Mg(NO3)2
400
How many atoms are there in S?
(5.6)x(6.02x10^23/1)= 3.37x10^24
400
What is the strongest type of polymer?
Cross-linked
400
Balance Fe2O3 + C -> Fe + CO2
2Fe2O3 + 3C -> 4Fe + 3CO2
500
Which is the only atom that doesn’t want 8 valence electrons?
Hydrogen
500
Is CaCl ionic or covalent?
Ionic
500
What is the mass of one mole of C?
12.011
500
What are 3 natural polymers?
Carbohydrates, proteins, nucleic acids
500
What is the law of conservation of mass?
Mass cannot be created or destroyed