Answer:
SO₃²⁻ is the reducing agent and Cr₂O₇²⁻ is the oxidizing agent.
Explanation:
Oxidation reaction:
3SO₃²⁻ (aq) + 3H₂O (l) → 3SO₄²⁻ (aq) + 6H⁺ (aq) + 6e⁻
Reduction reaction:
Cr₂O₇²⁻ (aq) + 14H⁺ (aq) + 6e⁻ → 2Cr ³⁺ (aq) + 7H₂O (l)
Now, adding the oxidation and the reduction reactions we get the full net reaction:
Cr₂O₇²⁻ (aq) + 3SO₃²⁻ (aq) + 8H⁺ (aq) → 2Cr ³⁺ (aq) + 3SO₄²⁻ (aq) + 4H₂O(l)
Since, the S in SO₃²⁻, present in the +4 oxidation state is oxidized to +6 oxidation state in SO₄²⁻, by the loss of 2e⁻.
<u>Therefore, SO₃²⁻ is the reducing agent. </u>
And, the Cr in Cr₂O₇²⁻, present in the +6 oxidation state is getting reduced to +3 oxidation state, Cr ³⁺, by the gain of 6e⁻.
<u>Therefore, Cr₂O₇²⁻ is the oxidizing agent.</u>
CCl₄ - carbon tetrachloride
This molecule has 4 polar bonds, but is non-polar in nature.
:)
Answer:
Pseudoscience
Explanation:
Predicting the future based solely on the position of the planets is an example of <u>pseudoscience</u>.
<em>Pseudoscience is a body of knowledge that is not based on the scientific method but on some unverifiable/unprovable claims.</em>
Predictions about the future can only be valid if it is based on the scientific method, not just about the position of the planet. The scientific method involves observation, hypothesis formulation, testing of the hypothesis through repeatable experiments, and arriving at conclusion.
Any other statement or belief that is not based on these procedures is said to be pseudoscientific.
Answer:
It would be A, B, and C.
Explanation: This is because radio waves are the longest and gamma rays are the shortest wavelengths. Visible light is in between infrared and ultraviolet rays.
Answer:
32 mol
Explanation:
Step 1: Write the balanced equation.
C₄H₁₀ + 6.5 O₂ → 4 CO₂ + 5 H₂O
Step 2: Establish the appropriate molar ratio.
The molar ratio of C₄H₁₀ to O₂ is 1:6.5
Step 3: Calculate the moles of oxygen needed to burn 5.0 mol of butane.
We use the molar ratio established in the previous step.
