Si is one element which is Silicon.
SI is made up of two elements: Sulfur and Iodine
I don't know about SL. If you mean SI, the unit of power is the watt (equal to joules/second).
The mass is sometimes informally called the "amount of substance", though this is not very precise. The SI unit for mass is the kilogram.
The SL unit, or System International (SI) unit, refers to the standard set of units used in science and engineering for measurements. The SI system includes seven base units: meter (length), kilogram (mass), second (time), ampere (electric current), kelvin (temperature), mole (amount of substance), and candela (luminous intensity). These units provide a consistent framework for expressing physical quantities and facilitate communication across various scientific disciplines.
mole
Second minute: the si base unit for time is secondvelocity: the si base unit for velocity is meters / second (m/s)
Amount = moles
si is backwards i think the mean is not si
Yes, silicon is a pure substance because it is an element. You can find it on the Periodic Table. Abreviation (Si)
There are many units to measure the distance .Sl units can be used to describe an objects volume is cubic m.
The SI unit for molar mass is grams per mole (g/mol). It represents the mass of one mole of a substance, which is a convenient way to compare the masses of different substances on a consistent scale.
Mole is the the unit for amount of substance in SI.
Mole is the unit for amount of a substance in SI.