2006-11-20 02:41:51 · 3 answers · asked by RAKSHITH M 2 in Science & Mathematics ➔ Chemistry
A mole of a substance has a weight in grams equal to the mass number. A mole is 6.022 x 10^23, or Avogadro's number. As an example, oxygen has a mass number of 16, because it has eight protons and eight neutrons, a total of 16 nucleons. And 6.022 x 10^23 atoms of oxygen has a mass of 16 g. The most stable isotope of uranium has a mass number of 238, and 6.022 x 10^23 molecules of uranium has a mass of 238 g. The same principal works with molecular mass.
2006-11-20 02:45:49 · answer #1 · answered by DavidK93 7 · 0⤊ 0⤋
The mass number is a weighted average of all the isotopes. It is weighted by their relative amount in nature. You round off that number to the nearest whole number to use it . In an equation, thhe coeeficient tells you how many moles are used. A mole is Avogadro's # of particles, and is the weight in grams of taht compound.
2006-11-20 03:42:05 · answer #2 · answered by science teacher 7 · 0⤊ 0⤋
atomic variety + neutrons = mass variety atomic variety ability the variety of protons, and the neutrons and protons are those with weight (electrons are much less weight, in basic terms one million/1823 of the burden of protons)
2016-12-29 06:18:20 · answer #3 · answered by Anonymous · 0⤊ 0⤋