What is optimisation in analytical instruments​

Starch and are common polysaccharide carbohydrates found in plants. sucrose glycogen fructose cellulose

Identify the missing numbers below to show the result of multiplying the numbers (1.6 × 10-19)(5.0 × 106) = c × 10d

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)