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Luden [163]
3 years ago
13

How many valence electrons are contained in N, O, and F, respectively? 5, 6, 7 7, 8, 9 3, 2, 1 14, 15, 18

Chemistry
1 answer:
trapecia [35]3 years ago
7 0
Nitogen - 5
Oxygen - 6
Flourine - 7
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How many moles are present in 54.8 mL of mercury if the density of mercury is 13.6 g/mL?​
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Answer:

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General Formulas and Concepts:

<u>Chemistry - Atomic Structure</u>

  • Reading a Periodic Table
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Explanation:

<u>Step 1: Define</u>

D = 13.6 g/mL

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<u>Step 2: Identify Conversions</u>

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<u>Step 3: Find</u>

13.6 g/mL = x g / 54.8 mL

x = 745.28 g Hg

<u>Step 4: Convert</u>

<u />745.28 \ g \ Hg(\frac{1 \ mol \ Hg}{200.59 \ g \ Hg} ) = 3.71544 mol Hg

<u>Step 5: Check</u>

<em>We are given 3 sig figs. Follow sig fig rules and round.</em>

3.71544 mol Hg ≈ 3.72 mol Hg

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