Answer:
a)

b)
hours
Explanation:
Given
Surface Area (S) of 250 grams of powder sample
square meter.
square centimeter
grams/minute
mg per second
gram per cubic meter
mg/ml
a)


cm /sec
b) Time taken
Time taken to sink

Time in hours
hours
That’s the SI unit of energy or work
Hydrogen peroxide forms as a product of metabolism. i hope this helps!
Carbon Dating would tell you the age of the charcoal