We can do this by using the formula:
\[n = \frac{m}{Mr}\]
where \(n\) is the number of moles, \(m\) is the mass and \(Mr\) is the molar mass. The molar mass of CaCl2 is approximately 110.98 g/mol. So, we have:
\[n = \frac{874 g}{110.98 g/mol} = 7.875 mol\]
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