What can measure only one quantity of liquid?
pipet
You have not specified the quantity of water. You cannot measure one fifth of an unspecified quantity.
Scalar quantity, e.g, mass, speed of light, charge, etc.
They are a measure of one quantity in comparison to another.
Directly propotional & invesly propotional
The measure of the quantity of matter is mass. Mass is a fundamental property of an object that determines its resistance to acceleration. It is typically measured in units such as kilograms or grams.
Because your only buying one pair of earrings so the quantity of the product is two but you've only bought one pair of earrings.
No millimetres, - that is a measure of length.
A litre is one, a gallon is another.
A liquid (or fluid) ounce is a measure of volume. A gram is a measure of mass. Therefore, the number of grams per fluid ounce of a liquid depends on what the liquid is, specifically on what its density is.
"Liquid quantity per hour" is a flow rate. It can be (any unit of volume) divided by (any unit of time). Some widely-used candidates are: -- cubic feet per minute -- gallons per minute -- liters per second etc.
It depends on one and one fourth of what measure: picolitres, or bucketfuls? and into what quantity of brownies?