The pressure exerted by a mass of "$\mathrm{x}$" mg resting on the area of $1.00{ \mathrm{cm}}^2$ is $1.00$ Pa. then "x" is

" $\mathrm{x}$ " mg =  $\mathrm{x}\times {10}^{-6}$ Kg

weight(m)  = $x\times {10}^{-6}$ Kg 

Now, Force= mg, {g=9.8 N}

                  =  $x\times {10}^{-6}\times 9.8 \mathrm{N}$ 

Now, We also know that Pressure= Force/Area 

                                                     $$\begin{gathered} 1=\frac{\mathrm{x}\times {10}^{-6}\times 9.8}{1.00\times {10}^{-4}} \\ \Rightarrow \mathrm{x}=\frac{1.00\times {10}^{-4}}{{10}^{-6}\times 9.8} \\ \Rightarrow \mathrm{x}=10.2 \end{gathered}$$