Question

what is the mass of 3*10 power6 atoms of aluminum (Al)

Answer 1

Explanation:

$mass \: = moles \: \times \: atomic \: mass$

$moles \: = \frac{no. \: of \: atom}{6.022 \times {10}^{23} }$

$moles \: = \frac{3 \times {10}^{6} }{6.022 \times {10}^{23} }$

$moles \: = 4.98 \times {10}^{ - 18}$

$mass \: = 4.98 \times {10}^{ - 18} \times 27$

$mass \: = 1.3446 \times {10}^{ - 17} \: g$