Question 7.10: A salt shaker contains 73.7 g of NaCl. How many moles of NaC......
A salt shaker contains 73.7 g of NaCl. How many moles of NaCl are present?
Step-by-Step
STEP 1 State the given and needed quantities.
Table 1
STEP 2 Write a plan to convert grams to moles.
grams of NaCl Molar mass moles of NaCl
STEP 3 Determine the molar mass and write conversion factors.
\left(1\times 22.99\right) +\left(1\times 35.45\right) ={58.44 \space g}/{mole}1 mole of NaCl = 58.44 g of NaCl
\frac{58.44 \space g \space NaCl}{1 \space mole \space NaCl} and \frac{1 \space mole \space NaCl}{58.44 \space g \space NaCl}
STEP 4 Set up the problem to convert grams to moles.
73.7 \space \cancel{g \space NaCl}\times \frac{1 \space mole \space NaCl}{58.44 \space \cancel{g \space NaCl}}=1.26 \space moles \space of \space NaClTable 1 :
| ANALYZE THE PROBLEM | Given | Need | Connect |
| 73.7 g of NaCl | moles of NaCl | molar mass |
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