Write a Balanced Chemical Equation for the Oxidation of Chromium

question 4

Multiple Choice

Write a balanced chemical equation for the oxidation of chromium metal with nitric acid.Assume the reaction products are Cr³⁺ and NH₄⁺.

• A) H⁺(aq)+ NO₃−(aq)+ Cr(s)→ NH₄⁺(aq)+ Cr³⁺(aq)
• B) 4H⁺(aq)+ NO₃−(aq)+ Cr(s)→ NH₄⁺(aq)+ Cr³⁺(aq)
• C) 10H⁺(aq)+ NO₃−(aq)+ 3Cr(s)→ NH₄⁺(aq)+ 3Cr³⁺(aq)+ 3H₂O(l)
• D) 10H⁺(aq)+ NO₃−(aq)+ Cr(s)→ NH₄⁺(aq)+ Cr³⁺(aq)+ 3H₂O(l)
• E) 30H⁺(aq)+ 3NO₃−(aq)+ 8Cr(s)→ 3NH₄⁺(aq)+ 8Cr³⁺(aq)+ 9H₂O(l)

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Definitions:

Call

An options contract that gives the investor the right, but not the obligation, to buy a stock, bond, commodity, or other instrument at a specified price within a specific time period.

Put

A financial derivative option that gives the holder the right, but not the obligation, to sell a security at a specified price within a specified time.

Black-Scholes Option

A mathematical model used to calculate the theoretical price of European put and call options, not accounting for dividends.

Continuous Compounding

The mathematical limit that compound interest can reach if it’s computed and added to the principal balance continuously, leading to exponential growth.