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GenaCL600 [577]
3 years ago
13

STOICHIOMETRY AND PERCENT PURITY

Chemistry
1 answer:
kogti [31]3 years ago
4 0

Excellent work. Very Helpful

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Hydrogen peroxide decomposes to water and oxygen at constant pressure by the following reaction: 2H2O2(l) → 2H2O(l) + O2(g) ΔH =
ziro4ka [17]

Answer:

-8.64kJ

Explanation:

Based on the reaction:

2 H₂O₂(l) → 2 H₂O(l) + O₂(g) ΔH = -196 kJ

When 2 moles of hydrogen peroxide (H₂O₂) descomposed, there are released -196kJ of energy.

Now, if 3,00g of hydrogen peroxide react, moles are:

3.00g × (1mol / 34.01g) = 0.0882moles H₂O₂

Releasing:

0.0882moles H₂O₂ × (-196kJ / 2mol H₂O₂) = <em>-8.64kJ</em>

6 0
3 years ago
What is a common substance that alkali metals react vigorously with?
Mekhanik [1.2K]

Answer:

Nitrogen, water

Explanation:

"Most common nonmetallic substances such as halogens, halogen acids, sulfur, and phosphorus react with the alkali metals."

4 0
4 years ago
Which energy source produces less negative
SpyIntel [72]

Answer:

A)Renewable Energy Sources

Explanation:

4 0
3 years ago
2-butanone is converted into 3-methyl-3-hexanol using a grignard reagent prepared from 1-bromopropane and magnesium metal in thf
Andre45 [30]

Answer:

Here's what I get.

Explanation:

At the end of the reaction you will have a solution of the alcohol in THF.

The microdistillation procedure will vary, depending on the specific apparatus you are using, but here is a typical procedure.

  • Transfer the solution to a conical vial.
  • Add a boiling stone.
  • Attach a Hickman head (shown below) and condenser.
  • Place the assembly in in the appropriate hole of an aluminium block on top of a hotplate stirrer.
  • Begin stirring and heating at a low level so the THF (bp 63 °C) can distill slowly.
  • Use a Pasteur pipet to withdraw the THF as needed.
  • When all the THF has been removed, raise the temperature of the Al block and distill the alcohol (bp 143 °C).

7 0
4 years ago
Which of the following is a chemical property? A- density B- melting point C- solubility D- toxicity
Nimfa-mama [501]

Answer:

D

Explanation:

<u>Toxic</u><u> </u><u>chemical</u><u> </u>as any substance which may be harmful to the environment or hazardous to your health if inhaled, ingested, or absorbed through the skin.

6 0
3 years ago
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