sample of Co (atomic #27) contains 1.21*10^24 atoms. whats the mass os the sample

Question

Question

science chemistry

Answer 1

Answer #1

First we will find moles of Co of the given atoms. Then find grams using moles. We will be using:

# 1 mol = 6.022*10^23 atoms

# atomic weight of Cobalt=58.93g/mol

# mole of atoms = grams(weight) /atomic weight

Now,

grams(weight)= mole*atomic weight = 2 mol * 58.93g/mol = 117.86 g

Answer 2

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