Chemistry correct calculation check

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Calculate the Calorimeter Constant (Ccal) if 25.00 g of water at 51.50°C was added to 25.00 g of water at 25.00 °C with a resulting temperature of 35.00 °C?

(*remember the specific heat capacity of water (cwater) = 4.180 J/g°C)

Do I substrate 35.00-25.00, then divide by 25.00g

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