Answer
heat capacity = 4.18 $\frac{J}{g.K}$ $\times$ 185 g = 773.3 $\frac{J}{K}$
Therefore, the heat capacity of 185 g of water is 773.3 $\frac{J}{K}$
Work Step by Step
In order to find the heat capacity of any sample, we need to know how much energy in Joules is required to raise that sample's temperature by 1 degree Kelvin, in other words , we need to find something that's represented in this unit $\frac{J}{K}$ . We can do that by multiplying the mass of water in grams (which is already given in the question) with the specific heat capacity of water in $\frac{J}{g.K}$ (which can be found in table 5.2). Doing this would leave us with $\frac{J}{K}$ since grams cancel each other out.
