In a study to determine the rate of the following reaction:
2no(g)+o2(g) = 2no2(g)
the concentration of no was 0.0400 m at t = 5.0 s and 0.0225 m at t = 650.0 s. what is the average rate of the reaction during this time period?

The rate of reaction is - 2.868 * 10^-4 M/S

Explanation:

In the following reaction: 2 NO + O2 → 2NO2

NO will be consumed, when adding O2.

This means it will disappear. This is confirmed by the concentration at 5 seconds and 650 seconds.

A = -Δ[A] / ΔT   = [A2] - [A1] / T2 - T1

(0.225 - 0.04) / (650 - 5) = 0.185 / 645 = 2.868 * 10^-4 M/S

Since it will disappear, this number will be negative : - 2.868 * 10^-4 M/S

The rate of reaction is - 2.868 * 10^-4 M/S

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).