Convert between mass, moles, and atoms of an element. How many Sn atoms are ther

Question

Convert between mass, moles, and atoms of an element. How many Sn atoms are there in a 25.5 gram sample of elemental Sn? The molar mass of a compound is the mass in grams of one mole of the compound. It is numerically formula (or molecular) weight. Formula weight is the sum of the atomic weights of the elements that multiplied by the number of atoms of each element in the formula for the substance. For substances that molecules, the formula weight is called the molecular weight. For example, one molecule of water,

Explanation / Answer

Answer

two step process mass to moles and then to atoms

step 1

mass to moles

moles = grams/ molar mass

= 25.5/118 = 0.216 mol

step 2

moles to atoms

atoms of sn = moles x Avogadro number

= 0.216 x 6.02 x 1023

=1.300 x1023 atoms

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---