Problem: You are given a sample containing 0.90 moles of a substance. a) How many atoms are in the sample if the substance is lead? b) How many atoms are in the sample if the substance is titanium? c) How many molecules are present in the sample if the substance is propanol, C3H7OH? 

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You are given a sample containing 0.90 moles of a substance. 

a) How many atoms are in the sample if the substance is lead? 

b) How many atoms are in the sample if the substance is titanium? 

c) How many molecules are present in the sample if the substance is propanol, C3H7OH?