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Deffense [45]
2 years ago
14

Use the drop-down menus to complete the statements about inertia, earth, and the moon.

Chemistry
2 answers:
Dimas [21]2 years ago
8 0
1) inertia 2) gravity 3) greater
Inga [223]2 years ago
7 0

Answer:

1) inertia 2) gravity 3) greater

Explanation:

Use the drop-down menus to complete the statements about inertia, earth, and the moon.

The moon’s 1.____ tries to push it off into space in a straight line, but earth’s 2.______ keeps the moon in orbit. The moon and earth are similar in that they both orbit around a body with 3._____ mass.

#1 answers: orbit, inertia

#2 answers: gravity, motion

#3 answers: greater, the same

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Which of the pairs below would be the best choice for a pH 5 buffer? HF/NaF, K a (HF) = 3.5 × 10-4 HC2H3O2/KC2H3O2, K a (HC2H3O2
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HC₂H₃O₂/KC₂H₃O₂

Explanation:

Considering the Henderson- Hasselbalch equation for the calculation of the pH of the basic buffer solution as:


pH=pK_b+log\frac{[salt]}{[acid]}


For a best pair, the pKa value must be equal to pH.

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out of the acidic buffer given,

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HC₂H₃O₂ , Ka = 1.8 × 10⁻⁵ , So pKa = 4.77

<u>The best pair to show pH = 5 is HC₂H₃O₂/KC₂H₃O₂</u>

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