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>
Answer:
Nitrogen, water
Explanation:
"Most common nonmetallic substances such as halogens, halogen acids, sulfur, and phosphorus react with the alkali metals."
Answer:
A)Renewable Energy Sources
Explanation:
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).
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.