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spayn [35]
3 years ago
12

What ion will be formed by the selenium atom shown below when it has a stable set of valence electrons?

Chemistry
1 answer:
Bas_tet [7]3 years ago
3 0

Answer:

Explanation:

D. Se2−

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Vapor obtained by evaporating 0.495 grams of an unknown liquid is collected in a 127 mL flask. At 371 K, the pressure of the vap
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Answer:

The molar mass in g/mol is 121.4 g/m

Explanation:

Let's apply the Ideal Gases Law to solve this:

P . V = n . R. T

V = 125 mL → 0.125L

P = 754 Torr

760 Torr ___ 1 atm

754 Torr ____ (754 / 760) = 0.992 atm

Moles = Mass / Molar mass

0.992 atm . 0.125L = (0.495 g / MM) . 0.082 . 371K

(0.992 atm . 0.125L) / (0.082 . 371K) = (0.495 g / MM)

4.07x10⁻³ mol = 0.495 g / MM

MM = 0.495 g / 4.07x10⁻³ mol → 121.4 g/m

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What was the name for the secret code used by many alchemists?
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Answer:

A. Zodiac

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The correct answer is D. Decknamen.

Explanation:

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According to one acid-base theory, water can act as a base because a water molecule can
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1) donate an H+ ion

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How can you minimize a collision summary
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