3.) Calculate \begin{tabular}{|l|l|} \hline a) The percentual weight (w/w) of Carbon in Ca(HCO3)2. \\ \hline b) The amount of substance of 120q of Calclum Chloride. & \\ \hline c) The mass of 1.7mmol of Glucose. & \\ \hline d) The volume of 250mol of an Ideal gas at physical standard conditions & \\ (273K, 1013 hPa) and at 2500hPa and 1300K. & \\ \hline e) The efficiency of reaction 2.d), having 3.00g educt and 2.019 product \\ (CuSO ). \end{tabular}