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The answer will depend on what aspect the 21 units refer to!
The answer will depend on what characteristic of the moon is being measured in what measurement units.
It could refer to the area of a rectangle that is 55 units long and 6 units deep.
You need to know that one mole is 6.022 x 1023 particles (atoms, molecules, ions, formula units, etc...).
Quantity K is metric for 1000. For units, it can also refer to Kelvin temperature. It can also refer to Kinetic energy.
If you refer to the units, energy is measured in joules.If you refer to the units, energy is measured in joules.If you refer to the units, energy is measured in joules.If you refer to the units, energy is measured in joules.
A molecule is the smallest unit with the characteristic properties of a molecular substance, i.e., one joined by covalent bonds. A single atom is the smallest unit with the characteristic properties of an elemental substance.
The normal units are Pascals below standard atmospheric pressure. However, extremely high quality vacuums are sometimes measured in terms of the number particles per unit volume. Very specialised equipment can create vacuum of one trillionths of atmospheric pressure, or 10 nanoPascals. This is equivalent to around 100 particles per cubic centimetre. However, in outer space, it can go down to only a handful of hydrogen atoms (not even molecules) per cubic metre.
The smallest units of matter are the subatomic particles.
4 base units each 1 meter in lenght
The answer will depend on what aspect the 21 units refer to!
BUTT
The particles in most solids from structural units called crystals. Crystals are a solid substance that have a geometrically shaped form.
1 kilograms and 1 square centimetres
the vinegar multiple units of CH2O and special arrangement
Formula units.
The answer will depend on what characteristic of the moon is being measured in what measurement units.