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katen-ka-za [31]
2 years ago
6

Determine the empirical and molecular formula for a compound containing 26.1

Chemistry
1 answer:
kobusy [5.1K]2 years ago
5 0

determing that the compoumd formed is in 100%

therefore, 26.1 +4.3+69.6 = 100%

hence no need of adding O molecule

finding the numbr of moles of each element

<em>n</em><em>o</em><em>.</em><em> </em><em>o</em><em>f</em><em> </em><em>m</em><em>o</em><em>l</em><em>e</em><em>s</em><em> </em><em>o</em><em>f</em><em> </em><em>C</em><em>=</em><em> </em><em>g</em><em>i</em><em>v</em><em>e</em><em>n</em><em> </em><em>m</em><em>a</em><em>s</em><em>s</em><em>÷</em><em>m</em><em>o</em><em>l</em><em>a</em><em>r</em><em> </em><em>m</em><em>a</em><em>s</em><em>s</em>

<em>=</em><em>2</em><em>6</em><em>.</em><em>1</em><em>÷</em><em>1</em><em>2</em>

<em>=</em><em><u>2</u></em><em><u>.</u></em><em><u>1</u></em><em><u> </u></em><em><u>m</u></em><em><u>o</u></em><em><u>l</u></em>

<em>n</em><em>o</em><em>.</em><em> </em><em>o</em><em>f</em><em> </em><em>m</em><em>o</em><em>l</em><em>e</em><em>s</em><em> </em><em>o</em><em>f</em><em> </em><em>H</em><em> </em><em>=</em><em> </em><em>g</em><em>i</em><em>v</em><em>e</em><em>n</em><em> </em><em>m</em><em>a</em><em>s</em><em>s</em><em>÷</em><em>m</em><em>o</em><em>l</em><em>a</em><em>r</em><em> </em><em>m</em><em>a</em><em>s</em><em>s</em>

<em>=</em><em>4</em><em>.</em><em>3</em><em>÷</em><em>1</em>

<em>=</em><em><u>4</u></em><em><u>.</u></em><em><u>3</u></em><em><u> </u></em><em><u>m</u></em><em><u>o</u></em><em><u>l</u></em>

<em>n</em><em>o</em><em> </em><em>o</em><em>f</em><em> </em><em>m</em><em>o</em><em>l</em><em>e</em><em>s</em><em> </em><em>o</em><em>f</em><em> </em><em>O</em><em> </em><em>=</em><em>g</em><em>i</em><em>v</em><em>e</em><em>n</em><em> </em><em>m</em><em>a</em><em>s</em><em>s</em><em>÷</em><em>m</em><em>o</em><em>l</em><em>a</em><em>r</em><em> </em><em>m</em><em>a</em><em>s</em><em>s</em>

<em>=</em><em>6</em><em>9</em><em>.</em><em>6</em><em>÷</em><em>1</em><em>6</em>

<em><u>=</u></em><em><u>4</u></em><em><u>.</u></em><em><u>3</u></em>

the simplest whole nber of the element in the unknown compoumd is 1:2:2 of C:H:O

HENCE, the empirical formula is CH2O2

empirical formula mass of CH2O2 IS

=(12)+(2×1)+(16×2)

12+2+32

46 G/MOL

N= molar mass of the compoumd ÷ emporical mass of the compoumd

N= 138÷46

<em><u>N</u></em><em><u>=</u></em><em><u>3</u></em>

<em><u>m</u></em><em><u>o</u></em><em><u>l</u></em><em><u>e</u></em><em><u>c</u></em><em><u>u</u></em><em><u>l</u></em><em><u>a</u></em><em><u>r</u></em><em><u> </u></em><em><u>f</u></em><em><u>o</u></em><em><u>r</u></em><em><u>m</u></em><em><u>u</u></em><em><u>l</u></em><em><u>a</u></em><em><u> </u></em><em><u>=</u></em><em><u>N</u></em><em><u>×</u></em><em><u>e</u></em><em><u>m</u></em><em><u>p</u></em><em><u>i</u></em><em><u>r</u></em><em><u>i</u></em><em><u>c</u></em><em><u>a</u></em><em><u>l</u></em><em><u> </u></em><em><u>f</u></em><em><u>o</u></em><em><u>r</u></em><em><u>m</u></em><em><u>u</u></em><em><u>l</u></em><em><u>a</u></em>

<em><u>=</u></em><em><u>3</u></em><em><u> </u></em><em><u>×</u></em><em><u>C</u></em><em><u>H</u></em><em><u>2</u></em><em><u>O</u></em><em><u>2</u></em>

<em><u>C</u></em><em><u>3</u></em><em><u>H</u></em><em><u>6</u></em><em><u>O</u></em><em><u>6</u></em><em><u> </u></em><em><u>i</u></em><em><u>s</u></em><em><u> </u></em><em><u>t</u></em><em><u>h</u></em><em><u>e</u></em><em><u> </u></em><em><u>m</u></em><em><u>o</u></em><em><u>l</u></em><em><u>e</u></em><em><u>c</u></em><em><u>u</u></em><em><u>l</u></em><em><u>a</u></em><em><u>r</u></em><em><u> </u></em><em><u>f</u></em><em><u>o</u></em><em><u>r</u></em><em><u>m</u></em><em><u>u</u></em><em><u>l</u></em><em><u>a</u></em><em><u> </u></em>

<em><u>(</u></em><em><u>t</u></em><em><u>a</u></em><em><u>r</u></em><em><u>t</u></em><em><u>o</u></em><em><u>n</u></em><em><u>i</u></em><em><u>c</u></em><em><u> </u></em><em><u>a</u></em><em><u>c</u></em><em><u>i</u></em><em><u>d</u></em><em><u>)</u></em>

<em><u>h</u></em><em><u>o</u></em><em><u>p</u></em><em><u>e</u></em><em><u> </u></em><em><u>i</u></em><em><u>t</u></em><em><u> </u></em><em><u>h</u></em><em><u>e</u></em><em><u>l</u></em><em><u>p</u></em><em><u>e</u></em><em><u>d</u></em><em><u> </u></em><em><u>u</u></em><em><u>!</u></em>

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