Gunpowder is a formulation of potassium nitrate, charcoal and sulphur in the ratio 15 : 3 : 2 What is meant by the term “formulation” [2]
Calculate the mass of charcoal in 40g of gunpowder [1]

Amount of liquid measured in l or lm

About 70 percent of the earth's surface is water-covered, and about 96.5 percent of all earth's water is salt water. identify the watery feature on earth that is made of freshwater rather than salt water. a) bay b) glacier c) ocean d) sea it is not incomplete this is the true question

An observation that requires measurement is called quantitative observable or qualitative