AP ChemistryScoring Guidelines

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2017

PV

RT0.40 atm 25.0 L

0.08206 (L atm)/(mol K) 393 K

´

´× ×

22 2

2

2

2

76.11 mol CS0.31 mol Cl = 7.9 g CS

3 mol Cl 1 m

3 g CS

ol CS´ ´

(enthalpies of bonds broken) (enthalpies of bonds formed)S S-

‒

1/2

0.693

t

0.693

10. h

0ln[A] ln[A] ln(0.1000) ln(0.0500)=

10. ht

t

- -

2 2

2NO

N O

( )

( )( )

P

P P

2(0.122)

(5.95)(1.55)

2

2

[NO ]pH = p + log

[HNO ]aK-

2

2

[NO ]log

[HNO ]

-

5

10

3 73 7

3 7 3 7

60.09 g C H OH 15.2 kJ1 mol C H OH 1661

1 mol C H OH 0.55 g C H OH´ ´ = kJ

31.7 × 10 kJ=

113 1.8 10

4

-´

0.100 L 41.65 10 mol

1 L

-´ 2

2

58.32 g Mg(OH)

1 mol Mg(OH)

C

mol

J

C

1 kJ

1000 J