Answer:
Isopropanol and dichloromethane, distilled well below their boiling point.
Explanation:
The best way to separate isopropanol and dichloromethane is the method of fractional distillation. In this method, different compounds separate from each other due to difference in boiling. The boiling point of dichloromethane is 39.6 degree Celsius which is lower than the boiling point of isopropanol which is 82.5 degree Celsius. So dichloromethane will be evaporated when the temperature reaches to 40 degree Celsius and separated from isopropanol before reaching its boiling point.
Answer:
31536000 seconds
Explanation:
there are 31536000 seconds in one year
Answer:
"A compound is always a molecule, but a molecule is not always a compound."
Explanation:
All compounds are molecules, but not all molecules are compounds. Hydrogen gas (H2) is a molecule, but not a compound because it is made of only one element. Water (H2O) can be called a molecule or a compound because it is made of hydrogen (H) and oxygen (O) atoms.
Answer:
- 2Al (s) + 3Br₂ (l) → 2AlBr₃(s)
Explanation:
<u>1) Word equation:</u>
- aluminum metal + liquid bromine → aluminum bromide
<u>2) Chemical equation:</u>
- Al (s) + Br₂ (l) → AlBr₃(s)
<u>3) Balanced chemical equation:</u>
- 2Al (s) + 3Br₂ (l) → 2AlBr₃(s)
<u>4) Notes:</u>
- The most common oxidation state of aluminum is +3.
- Bromine has 5 common oxidation states: -1, +1, +3, +5, and +7.
- Since aluminum has a positive oxidation state, bromine must have the negative oxidation state, - 1.
- In the molecular formula the valences (oxidation numbers) are exchanged as subscripts, that is the reason Al has subscript 1 (understood) while Br has subscript 3.
- This is combination or synthesis reaction: two elements combine to form a new compound.
- This is a very exothermic reaction which yields light (sparks) and heat.
- The product, AlBr₃ is a molecular compound (not ionic).
