9)
balanced equation: CuSO₄ + Zn(s) ---> ZnSO₄ + Cu(s)
reaction type: single replacement
10)
balanced equation: H₂O₂ ----> H₂O + O₂ catalyst MnO2 under the arrow.
reaction type: decomposition
Answer:
1. benzoic acid
2. p-cresol
3. Aniline
Explanation:
<u>1. Dissolving the mixture in a water-immiscible organic solvent - NaHCO₃, H₂O, CH₂Cl₂:</u>
Only benzoic acid will react with the base, sodium bicarbonate and will form ionic salt which is soluble in the water and thus benzoic acid acids gets separated in the aqueous medium.
<u>2. Dissolving the mixture in a water-immiscible organic solvent - NaOH, H₂O, CH₂Cl₂:</u>
p-cresol will react with strong base NaOH and form a salt with sodium ions which is soluble in water and thus p-cresol gets separated in the aqueous medium.
<u>3. Dissolving the mixture in a water-immiscible organic solvent - H₃O⁺Cl⁻, H₂O, CH₂Cl₂:</u>
Aniline will react with H₃O⁺Cl⁻ and form salt, anilinium chloride which is soluble in water and thus aniline gets separated in the aqueous medium.
Toulene will remain in the organic layer.
Balanced chemical reaction 1:
2Cu₂S(s) + 3O₂(g) → 2Cu₂O(s) + 2SO₂<span>(g).
</span>Balanced chemical reaction 2:
Cu₂O(s) + C(s) → 2Cu(s) + CO(g). /·2
2Cu₂O(s) + 2C(s) → 4Cu(s) + 2CO(g)<span>
Balanced net chemical equation:
</span>2Cu₂S(s) + 3O₂(g) + 2C(s) → 4Cu(s) + 2CO(g) + 2SO₂(g).
There 4 atoms of copper, 6 oxygens, 2 sulfur and 2 carbons on both side of reaction.
The answer should be A, flammability.
The isotopes of the same element would result in the same chemical properties, as the number of protons and electrons are not changed, meanwhile, the physical properties would be slightly different with each other because they have different numbers of electrons.
Out of the 4 options, only option A is a chemical property. Chemical properties are the properties of an element reacting with other substances that creates new substances at the end. While physical properties are the ones that does not produces new substances or any reactions. They are usually observable and measurable.
Therefore, since flammability is a chemical property, the answer is A.
Answer:
D.
Explanation:
I mean. It's logic for sure