Taking into account the definition of molarity, the molarity of a solution prepared by dissolving 0.2 mol sucrose in enough water to make a 100 mL solution is 2 .
<h3>Definition of molarity</h3>
Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:
Molarity is expressed in units .
<h3>Molarity in this case</h3>
In this case, you have:
- number of moles= 0.2 moles
- volume= 100 mL= 0.1 L
Replacing in the definition of molarity:
Solving:
<u><em>molarity= 2 </em></u>
Finally, the molarity of a solution prepared by dissolving 0.2 mol sucrose in enough water to make a 100 mL solution is 2 .
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Answer:
Carbon
Explanation:
The non metal in the same group as Pb is carbon or C .
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Archimedes used a physical method of identifying if the crown is pure gold or a mixture of gold and silver. He determined the density of the crown and compared it to the density of pure gold and pure silver. By weighing and determining the volume of the crown, he determines the density and compares it to the density of gold. If it does not match, then the crown is a mixture of gold and silver. Also, if we wanted to identify the percentage of the gold and silver in the crown he can use the density of both gold and silver and determine the percentages present in the crown. <span />
Answer:
Explanation:
Hello,
In this case, the first step is to compute the molarity of the first solution, for which we consider the molar mass of iron (III) nitrate that is 241.86 g/mol to compute the moles in 100.00 mL (0.1 L) of solution:
Which is actually the concentration of iron (III) ions. Therefore, for 10.00 mL of such solution, the concentration until a dilution to 250.0 mL results being:
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