Calculate the number of sodium atoms in 0.120 mol Na. Strategy Plan STEP 1: What unit is

Calculate the number of sodium atoms in 0.120 mol Na. 

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Strategy Plan STEP 1: What unit is asked for in the answer? STEP 2: What given value is related to the answer? given value 0.120 mol Na Step 1: STEP 3: What unit factor(s) should we apply? Since 1 mol Na = 6.02 x 1023 atoms Na, the two unit factors are 1 mol Na/6.02 x 1023 atoms Na, and its reciprocal 6.02 x 1023 atoms Na/1 mol Na. Unit Analysis Map X Step 2: Step 3: unit factor 6.02 x 1023 atoms Na 1 mol Na 1 mol Na 6.02 x 1023 atoms Na unit in answer = ? atoms Na atoms Na 0.120 mol Na or 6.02 x 1023 atoms Na 1 mol Na