I assume you're asking about density when you say "substance."
Take the example of carbon. In one form, it is a black powder (think soot). In its densest form it is diamond. A teaspoon of diamond has many more carbon atoms in it than a teaspoon of soot.
You find the number of atoms from the number of grams of a given substance by:Find the Moles of the Substance by multiplying the grams of the substance by the molar mass of the substance. ( Molar mass equals mass of substance per 1 mole of substance.)Grams x Molar Mass of Substance = Moles of SubstanceTake the moles of the substance and multiply it by Avogadro's Number (the number of atoms in 1 mole of substance, or simply 6.022x1023).Moles of Substance x Avogadro's Number (6.022x1023) = atoms of Substance
A pure substance in which all the atoms have the same atomic number or number of protons is an element.
There are 6.02 x 10 ^ 23 atoms or molecules of a substance in one mole of that substance. This is Avogadro's number.
When all atoms in a substance are alike, the substance is an element. Each element is composed of atoms that have the same number of protons in their nucleus.
The Avogadro Number , which is 6.022 x 10^(23) atoms/molecules make one mole.
It is the number of fundamental particles - atoms or molecules - of a substance in 1 mole of that substance.
i really dont know ''
i really dont know ''
The half-life of a substance is determined by its inherent radioactive decay rate and is not affected by the initial amount of substance present. Increasing the number of atoms at the beginning will not impact the rate at which the atoms decay and therefore will not affect the half-life. Each atom still has the same probability of decaying within its half-life period regardless of the total number of atoms.
Avogadro's constant is the number of atoms or molecules of a substance in 1 mole of that substance.
A pure substance is a material made of only one type of particle, such as atoms or molecules, and all the atoms in a pure substance have the same atomic number or number of protons. This means that all the atoms in a pure substance are of the same element.
An element is a substance in which all atoms have the same number of protons. Each element is identified by its unique number of protons, known as the atomic number.