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4 years ago

When using a crucible and lid, why must the crucible and lid be inspected for cracks before using?

Chemistry

2 answers:

kicyunya [14]4 years ago

7 0

If it has cracks it can shatter during heating due to temperature change.

Nana76 [90]4 years ago

3 0

Explanation:

A crucible and lid plays an important role in carrying out a reactions as they help the container or vessel to be tightly closed so the no other gases from the atmosphere can enter the vessel.

Moreover, it helps in maintaining the temperature of vessel.

Therefore, when the crucible and lid be inspected for cracks before using then it should not be used because during the reaction it is possible that it will break.

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What would the products of a double-replacement reaction between ca3n2 and al2o3 be?

djyliett [7]

The equation for the reaction between Ca3N2 and Al2O3 wiil be;
Al2O3 + Ca3N2 = 2AIN +3CaO
Thus, the products of the reaction will be Aluminium Nitride and Burnt lime(Calcium oxide). A double displacement reaction, also known as a double replacement reaction or metathesis, is a reaction where two compounds react, and the positive ions and the anions switch places, forming two new compounds or products.

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3 years ago

Draw the structure of the bromohydrin formed when (Z)-3-hexene reacts with Br2/H2O. Use the wedge/hash bond tools to indicate st

Ipatiy [6.2K]

Answer:

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Explanation:

In this case, we have reaction called halohydrin formation. This is a markovnikov reaction with anti configuration. Therefore the halogen in this case "Br" and the "OH" must have different configurations. Additionally, in this molecule both carbons have the same substitution, so the "OH" can go in any carbon.

Finally, in the product we will have chiral carbons, so we have to find the absolute configuration for each carbon. On carbon 3 we will have an "R" configuration on carbon 4 we will have also an "R" configuration. (See figure 1)

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4 years ago

The diagram shows a simple model of an Earth process.

Mariulka [41]

Answer:

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Explanation:

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3 years ago

Help me answer this chemistry question. thank you!

gayaneshka [121]

Answer:

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3 years ago

Chemistry questions below! (●'◡'●)

Pie

(1) • Balanced Equation : 2HgO (s) ---> 2 Hg (l) + O₂ (g)

• Line a is represented by activation energy, or the smallest amount of energy needed for molecules to undergo a chemical reaction.

• Activated complex is the intermediate state during the conversion of reactants into products. In this case it is represented by Hg----O-----O----Hg. The dashed lines indicate that the bond between Hg and O are breaking and their length is increasing and the dashed line between oxygen atoms indicate that the bond is decreasing and bond formation is taking place.

• This reaction is endothermic as the energy of reactants is smaller than the energy of products.

(2) • Balanced Equation : CH₃Br + OH⁻ ---> CH₃OH + Br⁻

• The hydroxide ion reacts with the bromomethane, resulting in a double replacement reaction. The 'CH₃' in 'CH₃Br' joins with the hydroxide ion to form CH₃OH, while the Br breaks off as an ion.

• Take a look at the energy diagram below.

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3 years ago