How many moles of lead (pb) atoms are in 354 g pb? 9.72 × 10^-25 mol 0.585 mol 1.71 mol 3.52 × 10^23 mol

Molar mass Pb = 207.2 g/mol

1 mole 207.2 g
( moles Pb) 354 g

moles Pb = 354 x 1 / 207.2

moles Pb = 354 / 207.2

= 1.71 moles 

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If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom

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