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CHE 2A Chapter 5: Chapter 5 notes

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School
UC-Davis
Department
Chemistry
Course
CHE 2A
Professor
Chamberlain

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Related Questions

<p>CO3(aq)+H2O(l)--&gt; HCO3(aq)+OH(aq) &#160;&#160; Kb=2.13*10-4</p>
<p>H2O(l)--&gt;H(aq)+OH(aq) &#160; &#160;&#160; &#160; &#160; &#160; &#160; &#160;&#160; &#160; &#160; &#160;&#160;Kw=1.0*10-4</p>
<p>CaCO3(s)----&gt;Ca(aq)+CO3(aq) &#160; &#160;&#160; &#160; &#160; &#160; &#160; &#160;&#160;Ksp=4.5*10-9</p>
<p>find the equlibrium constant for the follwingreactions:</p>
<p>CO3(aq)+H(aq)--&gt;HCO3(aq)</p>

<p>Calcium cyanamide, CaCN<sub>2</sub>, reactswith water to form calcium carbonate andammonia.&#160;</p>
<p>&#160;</p>
<p>CaCN<sub>2</sub>(<em>s</em>) +3H<sub>2</sub>O(<em>l</em>) &#224;CaCO<sub>3</sub>(<em>s</em>) +2NH<sub>3</sub>(<em>g</em>)</p>
<p>&#160;</p>
<p>a. How many grams of water are needed to react with 75.0 gof CaCN<sub>2</sub>?</p>
<p>&#160;&#160;&#160;</p>
<p>b. How many grams of CaCO3 form if 155 g of waterreacts?</p>

<p>Given the listed average bond energies, calculate theenthalpy change for the production of 48.0 g of methanol by thereaction:<br />CO2 (g) + 3 H2(g) --&gt; CH3OH(g) +H2O</p>
<p>C---O / 360kJ/mole&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;C===O / 736kJ/mol&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;H---H / 436 kJ/mol</p>
<p>H---O / 464kJ/mol&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;H-----C / 414 kJ/mol</p>
<p>a) +214 kJ</p>
<p>b)+639 kJ</p>
<p>c) 0</p>
<p>d) -321 kJ</p>
<p>e) -108 kJ</p>
<p>&#160;</p>
<p>Please show ALL the work on how you got theanswer..otherwise I will not understand. Thank you :)</p>