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olasank [31]
3 years ago
10

When molten candle wax solidifies is that a chemical reaction or not?l

Chemistry
1 answer:
andrey2020 [161]3 years ago
3 0

Yes, when molten candle wax solidifies it is a chemical reaction

<u>Explanation:</u>

Basically Wax is crystalline so once the candle light melts it freezes taking back the solid state to the room temperature.

When the room temperature is below the freezing point, the liquid candle wax, turns into solid state again, therefore this process is called solidification. The process of freezing or solidification is a process when an object turns liquid and freezes back to solid state.

Indeed, Yes, when molten candle wax solidifies it is a chemical reaction

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How many moles of Cl2 are needed in order to produce 100.0 grams of FeCl3 given the following
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Answer:

0.92moles

Explanation:

Given reaction:

              2Fe + 3Cl₂ →  2FeCl₃

Mass of FeCl₃  = 100g

Unknown:

Number of moles of Cl₂  needed = ?

Solution:

To solve this problem, we work from the known specie to the unknown.

From the mass of the FeCl₃ given, we can solve for the number of moles of the unknown.

  • Number of moles of FeCl₃;

  Number of moles  = \frac{mass}{molar mass}  

  Molar mass of  FeCl₃ = 56 + 3(35.5) = 162.5g/mol

   Number of moles  = \frac{100}{162.5}  = 0.62mole

From the reaction expression;

           2 mole of FeCl₃ is produced from 3 moles of  Cl₂  

           0.62 mole of FeCl₃ will be produced from \frac{0.62 x 3}{2}   = 0.92mole

The number of moles of Cl₂  = 0.92moles

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