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The chemical formula of propane is C3H8. Which number correctly uses scientific notation to represent the number of atoms in 2.00 moles of propane?

Verified Answer :

MissPhiladelphia

Avogadro's number
represents the number of units in one mole of any substance. This has the value
of 6.022 x 10^23 units / mole. This number can be used to convert the number of
atoms or molecules into number of moles. We do as follows:

2.00 mol C3H8 (  6.022 x 10^23 atoms / mole ) = 1.204x10^24 atoms C3H8

CintiaSalazar

Answer:

1.204610²⁴ atoms

Explanation:


Avogadro's Number or Avogadro's Constant to the number of particles that constitute a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023 10²³ particles per mole. Avogadro's number represents a quantity without an associated physical dimension, so it is considered a pure number that allows describing a physical characteristic without dimension or explicit unit of expression. The Avogadro number applies to any substance.


Then a rule of three applies as follows: if 1 mole has 6,023 10²³ atoms, 2 moles how many atoms will it contain?

\(number of atoms=\frac{2 moles*6.023*10^{23} }{1mole}\)

number of atoms=1.204610²⁴ atoms

This number is already represented in scientific notation.

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