The mass in grams of 2.75 x 1021atoms of Li is.

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The mass in grams of 2.75 x 1021atoms of Li is. a. 0.3017 g c. 3.017 g b. 0.0317 g d. 0.00317 g

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asked May 9, 2019 196k views

The mass in grams of 2.75 x 1021atoms of Li is. a. 0.3017 g c. 3.017 g b. 0.0317 g d. 0.00317 g

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Nidhi Dadiya · Answer 1 · 2018-03-22T16:35:21+0000

Hey there!

atomic mass Li = 6.941 a.m.u

6.941 g Li ------------------------ 6.02x10²³ atoms
grams Li ------------------------- 2.75x10²¹ atoms

grams Li = (2.75x10²¹ ) * 6.941 / 6.02x10²³

grams Li = 1.908775x10²² / 6.02x10²²

grams Li = 0.0317 g

The mass in grams of 2.75 x 1021atoms of Li is.

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