In this experiment you will determine the relative atomic mass, $$\(A_{r}\)$$, of metal $$\(\mathbf{M}\)$$ by thermal decomposition of the same basic metal carbonate, $$\(\mathrm{MCO}_{3} \cdot \mathbf{M}(\mathrm{OH})_{2}, \mathrm{FB} 1\)$$. Calculations (i) When FB 1 undergoes thermal decomposition, the products are the metal oxide, MO, carbon dioxide and water vapour. Give the equation for the thermal decomposition of FB 1. Include state symbols. ................................................................................................................................. (ii) The amount, in mol, of carbon dioxide produced is given by the following formula. $$\[ \text { amount of } \mathrm{CO}_{2}=\frac{\text { mass loss during heating }}{\left(M_{\mathrm{r}} \text { of } \mathrm{CO}_{2}+M_{\mathrm{r}} \text { of } \mathrm{H}_{2} \mathrm{O}\right)} \]$$ Calculate the amount, in mol, of carbon dioxide produced in (a). $$\[ \text { amount of } \mathrm{CO}_{2}= \]$$ .......................... $$\(\mathrm{mol}\)$$ (iii) Calculate the relative formula mass, $$\(M_{\mathrm{r}}\)$$, of the basic metal carbonate. $$\[ M_{\mathrm{r}} \text { of } \mathrm{MCO}_{3} \cdot \mathbf{M}(\mathrm{OH})_{2}= \]$$ .......................... (iv) Use your answer to (b)(iii) to calculate the relative atomic mass, $$\(A_{\mathrm{r}}\)$$, of metal $$\(\mathbf{M}\)$$. Show your working. $$\[ A_{\mathrm{r}} \text { of } \mathbf{M}= \]$$ ..........................

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