An atom of gold has a mass of 3.271* 10(-22)g. How many atoms of gold are in 5.00g of gold

Simply divide 5 by 3.271*10^-22 and round to the nearest whole number.

$${\frac{{\mathtt{5}}}{\left({\mathtt{3.271}}{\mathtt{\,\times\,}}{{\mathtt{10}}}^{\left(-{\mathtt{22}}\right)}\right)}} = {\mathtt{15\,285\,845\,307\,245\,490\,675\,634.362\: \!580\: \!250\: \!687\: \!863}}$$

So: 15 285 845 307 245 490 675 634 

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