If pecans sale for three dollars per pound and there are 127 pecans per pound how many pecans can you buy for $14.12

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

How many liters of oxygen gas, at standard temperature and pressure, will react with 35.8 grams of iron metal? 4 fe (s) + 3 o₂ (g) → 2 fe₂o₃ (s)

Which statement best describes the flow of energy in this scenario