Chem 4

Nomenclature

Covalent Bonds

Accurate and/or Precise

Molar Mass

Stoich

100

SO₂

Sulfur dioxide

100

Covalent bonds form between two or more ____

nonmetals

100

111g, 112g, 111g ; Actual value = 118g

Precise

100

H₂O

18 g/mol

100

Number of atoms in 2 moles of water

12.04 x 10²³ or 1.204 x 10²⁴

200

MgO

Magnesium oxide

200

F-F ; polar or nonpolar

nonpolar

200

12ml, 14ml, 12ml Actual value 12 ml

Accurate

200

CH₄

16 g/mol

200

N₂+ 3 H₂ -----> 2 NH₃ ; How many moles of ammonia form if 3 moles of nitrogen react with excess hydrogen?

6 moles

300

PCl₅

Phosphorus pentachloride

300

The ability of an element to draw electrons toward it in a molecule

Electronegativity

300

10 atm, 10 atm, 10 atm Actual value 10 atm

Accurate and precise

300

K₂O

94 g/mol

300

N₂+ 3 H₂ -----> 2 NH₃ ; How many moles of ammonia form if 20 grams of nitrogen react with excess hydrogen?

1.43 moles

400

Ca(OH)₂

Calcium hydroxide

400

H-F ; polar or nonpolar

polar

400

Error associated with the measurer

Precision

400

Al(OH)₃

78 g/mol

400

N₂+ 3 H₂ -----> 2 NH₃ ; How many grams of ammonia form if 3 moles of nitrogen react with excess hydrogen?

102 grams

500

AlF₃

Aluminum fluoride

500

Developed electronegativity chart

Linus Pauling

500

Error associated with instruments

Accuracy

500

C₆H₁₂O₆

180 g/mol

500

N₂+ 3 H₂ -----> 2 NH₃ ; How many liters of ammonia form if 3 moles of nitrogen react with excess hydrogen at STP?

134.4 L