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Draw a Lewis structure for ethanol , then answer the following questions about the structure: Number of valence electrons: Number of bonding electrons: Number of non-bonding electrons: Tries 4/99 Previous Tries Identify the fault, if any, in each of the following Lewis structures for ethanol. If more than one answer appl A Incorrect: Wrong molecular formula. B Incorrect: Correct molecular formula but wrong structural formula. Incorrect: Not enough electrons. Incorrect: Too many electrons. E Incorrect: Correct number of electrons, but octet rule violated. Correct: Octet rule violation is permitted in this case. G Correct: But a better resonance structure exists. Identify: The electron pair geometry of the oxygen atom in ethanol. The molecular geometry of the central carbon atom in ethanol. The hybridization of the oxygen atom in ethanol. The electron pair geometry of the terminal carbon atom in ethanol. The electron pair geometry of the central carbon atom in ethanol. The approximate size (in degrees) of the bond angle in ethanol. Tries 1/99 Previous Tries

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Samuel

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Draw a Lewis structure for ethanol (C₂H5OH), then answer the following questions about the structure:\nC=2,4\nH=1\n0=2,6\nNumber .

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Description CS city hires M workers who drive water trucks. They spray water on the streets to clean them, and reduce the dust concentration. There are <span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.6861em;"></span><span class="mord mathbf">N</span></span></span></span> streets in CS city. The city has a dust control plan, which uses a task scheduler to generate a daily cleaning plan. This plan tells each worker what streets they are responsible for, and ideally all streets will be cleaned. For example, the plan tells worker A to clean street 0 to street <span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord">3</span><span class="mopen">([</span><span class="mord">0</span><span class="mpunct">,</span><span class="mspace" style="margin-right:0.1667em;"></span><span class="mord">3</span><span class="mclose">])</span></span></span></span>, worker <span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.6833em;"></span><span class="mord mathnormal" style="margin-right:0.05017em;">B</span></span></span></span> to clean streets <span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mopen">[</span><span class="mord">4</span><span class="mpunct">,</span><span class="mspace" style="margin-right:0.1667em;"></span><span class="mord">6</span><span class="mclose">]</span></span></span></span>. This plan will clean 7 streets. However, the task scheduler is buggy. Today it tells worker A to clean streets <span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mopen">[</span><span class="mord">0</span><span class="mpunct">,</span><span class="mspace" style="margin-right:0.1667em;"></span><span class="mord">3</span><span class="mclose">]</span></span></span></span> and tells worker B to clean streets [3, 5]. Someone realizes that two workers cleaned street 3 twice, and no one cleaned street 6. It's your job to write a program to automatically detect the task scheduler's bugs, and report how many streets are not cleaned in today's plan. Input Format The first line contains two integers <span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.8805em;vertical-align:-0.1944em;"></span><span class="mord mathbf">M</span><span class="mpunct">,</span><span class="mspace" style="margin-right:0.1667em;"></span><span class="mord mathbf">N</span></span></span></span>. <span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.6861em;"></span><span class="mord mathbf">M</span></span></span></span> is the number of workers, and <span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.6861em;"></span><span class="mord mathbf">N</span></span></span></span> is the number of streets. The following <span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.6861em;"></span><span class="mord mathbf">M</span></span></span></span> lines are just the plan generated by task scheduler. Each line contains two integers <span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="minner"><span class="mopen delimcenter" style="top:0em;">[</span><span class="mord"><span class="mord mathnormal">L</span><span class="msupsub"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.3117em;"><span style="top:-2.55em;margin-left:0em;margin-right:0.05em;"><span class="pstrut" style="height:2.7em;"></span><span class="sizing reset-size6 size3 mtight"><span class="mord mtight"><span class="mord mathnormal mtight">i</span></span></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height:0.15em;"><span></span></span></span></span></span></span><span class="mclose nulldelimiter"></span></span></span></span></span>, <span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.8333em;vertical-align:-0.15em;"></span><span class="mord"><span class="mord mathnormal" style="margin-right:0.00773em;">R</span><span class="msupsub"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.3117em;"><span style="top:-2.55em;margin-left:-0.0077em;margin-right:0.05em;"><span class="pstrut" style="height:2.7em;"></span><span class="sizing reset-size6 size3 mtight"><span class="mord mtight"><span class="mord mathnormal mtight">i</span></span></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height:0.15em;"><span></span></span></span></span></span></span></span></span></span> ]. It indicates that worker i should clean street <span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.8333em;vertical-align:-0.15em;"></span><span class="mord"><span class="mord mathnormal">L</span><span class="msupsub"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.3117em;"><span style="top:-2.55em;margin-left:0em;margin-right:0.05em;"><span class="pstrut" style="height:2.7em;"></span><span class="sizing reset-size6 size3 mtight"><span class="mord mtight"><span class="mord mathnormal mtight">i</span></span></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height:0.15em;"><span></span></span></span></span></span></span></span></span></span> to <span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.8333em;vertical-align:-0.15em;"></span><span class="mord"><span class="mord mathnormal" style="margin-right:0.00773em;">R</span><span class="msupsub"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.3117em;"><span style="top:-2.55em;margin-left:-0.0077em;margin-right:0.05em;"><span class="pstrut" style="height:2.7em;"></span><span class="sizing reset-size6 size3 mtight"><span class="mord mtight"><span class="mord mathnormal mtight">i</span></span></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height:0.15em;"><span></span></span></span></span></span></span></span></span></span>. Output Format One integer, representing how many streets have not been cleaned. Sample Input 27 Sample Input 27 03 35 Sample Output 1 Explanation Worker A cleans streets [0,3], and worker B cleans streets [3,5]. Street 6 is the only street that was not cleaned, so return 1. Input Constraints <span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:2.4em;vertical-align:-0.95em;"></span><span class="mord"><span class="mtable"><span class="arraycolsep" style="width:0.5em;"></span><span class="col-align-l"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:1.45em;"><span style="top:-3.61em;"><span class="pstrut" style="height:3em;"></span><span class="mord"><span class="mord">50%</span><span class="mpunct">,</span><span class="mspace" style="margin-right:0.1667em;"></span><span class="mord">1</span><span class="mspace" style="margin-right:0.2778em;"></span><span class="mrel">&lt;=</span><span class="mspace" style="margin-right:0.2778em;"></span><span class="mord mathrm">M</span><span class="mpunct">,</span><span class="mspace" style="margin-right:0.1667em;"></span><span class="mord mathrm">N</span><span class="mspace" style="margin-right:0.2778em;"></span><span class="mrel">&lt;=</span><span class="mspace" style="margin-right:0.2778em;"></span><span class="mord">1000</span></span></span><span style="top:-2.41em;"><span class="pstrut" style="height:3em;"></span><span class="mord"><span class="mord">100%</span><span class="mpunct">,</span><span class="mspace" style="margin-right:0.1667em;"></span><span class="mord">1</span><span class="mspace" style="margin-right:0.2778em;"></span><span class="mrel">&lt;=</span><span class="mspace" style="margin-right:0.2778em;"></span><span class="mord mathrm">M</span><span class="mpunct">,</span><span class="mspace" style="margin-right:0.1667em;"></span><span class="mord mathrm">N</span><span class="mspace" style="margin-right:0.2778em;"></span><span class="mrel">&lt;=</span><span class="mspace" style="margin-right:0.2778em;"></span><span class="mord">200000</span></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height:0.95em;"><span></span></span></span></span></span><span class="arraycolsep" style="width:0.5em;"></span></span></span></span></span></span>