The world's longest ongoing war. For more than 60 years, Karen rebels have been fighting a civil war against the government of Myanmar. In February 1949, members of the Karen ethnic minority launched an armed insurrection against Myanmar's central government.
In Chemistry the quantities of a dozen, a century, a gross, ream and millennium are far too small. Even a million is too small. One million atoms of iron weighs 0.0000000000000000928 grams! Chemistâs measure atomic particles using a large QUANTITY called the mole. One mole is equal to 602214179000000000000000 or 6.022 x 1023 particles.
The SI unit for amount of substance is the mole. It has the unit symbol mol. The mole is defined as the amount of substance that contains an equal number of elementary entities as there are atoms in 12 g of the isotope carbon-12.This number is called Avogadro's number and has the value 7023602214085700000â 6.022140857(74)Ã1023.he mole is defined as the amount of substance that contains an equal number of elementary entities as there are atoms in 12 g of the isotope carbon-12.