How Many Atoms Are In 15.6 Grams Of Silicon?


2 Answers

amber Jhon Profile
amber Jhon answered
Silicon is the most common metalloid and its symbol is Si. It is a chemical element with atomic number 14. The atomic mass of the silicon is 28 (atomic mass unit). The molar mass of silicon is approximately 28 grams.

Moles = given mass / molar mass

given mass = 15.6 grams

Moles = 15.6 grams / 28 grams

Moles= 0.557

According to the Avogadro's number, one mole has 6.022 x 1023 atoms.

Atoms in 15.6 grams of silicon= 0.557 x 6.022 x 1023 atoms

Atoms in 15.6 grams of silicon= 3.36 x 1023 atoms
Kamran Tariq Profile
Kamran Tariq answered
Find no. Moles of Silicon by dividing mass by Ar.
Then, multiply the result with the Avogadro's Constant.

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