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Anika [276]
3 years ago
8

the burning of wood is a chemical reaction between cellulose molecules in the wood and oxygen the products are carbon dioxide an

d water what would you have to do in order to prove that this reaction obeys the law of conservation of mass?
Chemistry
1 answer:
Sati [7]3 years ago
3 0

Put the <em>wood and excess oxygen in a closed contai</em>ner that contains some device that can create a spark (to start the reaction).

Determine the <em>mass of container + contents</em>.

<em>Start the reaction</em> and, after everything has cooled down, again determine the <em>mass of container + contents</em>.

If the two masses are the same, you have demonstrated that the reaction obeys the Law of Conservation of Mass.

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44.8% of a 250. mL acid solution is used in an experiment, what volume of acid (in mL) was used?
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Answer:

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Explanation:

The formula for percent by volume is

\text{Percent by volume} = \dfrac{\text{Volume of solute}}{\text{Volume of solution}}\times 100 \, \%

If you have 250 mL of a solution that is 44.8 % v/v,

\begin{array}{rcl}44.8\, \% & = & \dfrac{\text{Volume of solute}}{\text{250 mL}}\times 100 \, \%\\\\44.8 \times \text{ 250 mL} & = & \text{Volume of solute} \times 100\\\text{Volume of solute} & = & \dfrac{44.8 \times 250\text{ mL}}{100}\\\\ & = & \textbf{112 mL}\\\end{array}

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I believe the answer is a because 2 times 12 is 24. Hope this helped
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How do I find molar mass​
sergij07 [2.7K]

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