Exam 2

Question 1

Diatomic molecules

Answer 1

Hydrogen – H2
Nitrogen – N2
Oxygen – O2
Fluorine – F2
Chlorine – Cl2
Bromine – Br2
Iodine – I2

Question 2

Electronegativity

0.0-0.4

Answer 2

Bond type: nonpolar covalent

Electrons shared equally

Question 3

Electronegativity

0.5-1.8

Answer 3

Bond type: Polar covalent
Electrons shared unequally

Partial + partial -

Question 4

Electronegativity

1.9-3.3

Answer 4

Bond type: Ionic
Electrons transferred
+ -

Question 5

Electronegativity

Answer 5

Weak——-Strong
Left. Right

Weak——–Strong
bottom top

Question 6

Solutions = Solvent + Solute

Answer 6

Homogenous mixture= greater + less

Question 7

Equivalents

Answer 7

-

Question 8

Molarity

Answer 8

-

Question 9

%(m/m)

Answer 9

-

Question 10

%(v/v)

Answer 10

-

Question 11

%(m/v)

Answer 11

-

Question 12

%= part/ whole(100)=

Answer 12

solute/solvent (100)

Question 13

of moles ?

Answer 13

Grams to moles use molar mass

Question 14

of grams ?

Answer 14

Moles to grams use molar mass

Question 15

Given moles. > particles (atoms)

Answer 15

multiply moles & avogadros #

4.987 moles Cr. X. 6.02x10^23
I mole Cr atoms
= 3.002174x10^24 Cr atoms

Question 16

Given particles > moles

Answer 16

Divide Ions or moles by avogadros #

9. 61x10^87 Ba2+Ions X 1 mole Ba2+ ions
   6. 02x10^23 Ba2+ions

= 1.59634x10^64. = 1.60x10^64 moles Ba2+ions

Question 17

Avogadros Number

Answer 17

6.02X10^23

Question 18

Particulates <> moles <> grams

        Avogadros #           molar mass

Answer 18

*

Question 19

-

Answer 19

McVc=MdVd

CcVc=CdVd