B liquid hope this helps :)
Answer: number of atoms is 5.21 · 10^24
Explanation: Atomic mass of Be is 9.012 g/mol.
Number of moles n = m/M = 78.0 g / 9.012 g/mol =
Multiply this with Avogadro number Na = 6.022*10^23 1/mol
I think the aswer is D
Answer:
True po
Explaination :
I hope it helps
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Explanation:
c
It excess out the crystal
