Consider the Reaction Below $\rightarrow$ 2NO(g) + O₂(g)
​
the Concentration of NO₂ Was Measured

question 73

Multiple Choice

Consider the reaction below.2NO₂(g) $\rightarrow$ 2NO(g) + O₂(g)
​
The concentration of NO₂ was measured to be 0.0048 mol/L after 200 s and 0.0043 after 250 s. Calculate the reaction rate.

• A) 1.0 × 10⁻⁵ mol L⁻¹ s⁻¹
• B) 2.0 × 10⁻⁵ mol L⁻¹ s⁻¹​
• C) 1.0 × 10⁻⁴ mol L⁻¹ s⁻¹​
• D) 2.0 × 10⁻⁴ mol L⁻¹ s⁻¹​
• E) ​1.0 × 10⁻³ mol L⁻¹ s⁻¹

---

Definitions:

Marketable Securities

Financial instruments that can be easily converted into cash, such as stocks, bonds, or treasury bills, typically held for short-term investment purposes.

Inventory Turnover

A ratio showing how many times a company's inventory is sold and replaced over a particular period, indicating the efficiency of inventory management.

Days' Sales

A financial metric estimating the number of days required to convert a company's inventory into sales, also known as inventory turnover period.

Cost Of Goods Sold

The expenses directly associated with manufacturing products that a company sells.