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RoseWind [281]
3 years ago
12

A weighed piece of magnesium ribbon is added to a dried crucible, which is reweighed and heated in air to form the compound MgO.

The crucible is cooled and reweighed to find the mass of MgO. Which error could lead to a mass percentage of magnesium that is too low?
Chemistry
1 answer:
olga nikolaevna [1]3 years ago
4 0

Answer:

One of the errors for low percentage of magnesium could be because not all the magnesium may have reacted.

Explanation:

During the heating process, if the magnesium have not reacted completely, it can lead to low percentage of magnesium in the oxide formed. The product may still look a bit greyish rather than whitish after the heating process.

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The density of copper is 8.92 g/mL. The mass of a piece of copper that has a volume of 10.3 mL is
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<h2>91.9 g</h2>

Explanation:

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Which is the limiting reactant if we start with 30.0 g Al and 30.0 h O2​
lorasvet [3.4K]

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Explanation:

The limiting reactant will be Al:

        4Al + 3O₂ → 2Al₂O₃

The limiting reactant is the reactant in short supply in a chemical reaction.

     Given parameters:

  Mass of Al = 30g  Molar mass = 27g/mol

         Number of moles = \frac{mass}{molar mass} =  \frac{30}{27}

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In the reaction:

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But we have been given 0.94mole of O₂. This is more than required.

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Learn more:

Limiting reagents brainly.com/question/6078553

#learnwithBrainly

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