Question
Asked Sep 13, 2019
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A sample of terbium contains 3.01×1025 atoms. What is the total mass of this sample?
The molar mass of terbium is 158.9 g/mol
7.95×103 g
50.0 g
2.88×1051 g
3.97×105 g
4.79×1027 g
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Expert Answer

Step 1

It is required to calculate the mass of 3.01 x 1025 atoms of terbium and the molar mass is 158.9 g/mol. This can be done as,

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6.022 x 1023 atoms are contained in 1 mole of an element 1 mole of an element is equal to the molar mass of that element,

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Step 2

Therefore, 6.022 x 1023 atoms of Terbiu...

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158.9 1 atom will have a mass of = g 6.022 x 1023 3.01 x 1025 atoms of terbium will have a mass 158.9 6.022 x 1023 X 3.01 x 1025 3.01 x 1025 atoms of terbium will have a mass 7950 g = 7.95 x 103 g

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