Question

Determine the mass in grams of 4.69 x 1021 atoms of barium. (The

mass of one mole of barium is 137.33 g.)

Answer 1

1.07 g Ba

Step-by-step explanation:

Hello there!

In this case, according to the definition of the Avogadro's number and the molar mass, it is possible to say that 6.022x10^{23} atoms of barium equal one mole, and at the same time, 1 mole equals 137.327 grams of this element; thus, it is possible to say that 6.022x10^{23} atoms of barium have a mass of 137.327 grams; therefore, it i possible for us to calculate the required mass in grams as shown below:

`4.69x10^(21)atoms*(137.327gBa)/(6.022x10^(23) atoms) \\\\=1.07gBa`

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