This question is about elements in Group 7 of the periodic table.
Table 1 shows the melting points and boiling points of fluorine, chlorine, and bromine.
Table 1
| Element | Melting point in °C | Boiling point in °C |
|---|---|---|
| Fluorine | -220 | -188 |
| Chlorine | -101 | -35 |
| Bromine | -7 | 59 |
Using Table 1, determine the physical state of chlorine at −50 ∘C-50\text{ }^{\circ}\text{C}−50 ∘C. Give a reason for your answer.
Balance the equation for the reaction between iron and bromine: 2Fe+‾Br2→2FeBr32\text{Fe} + \underline{\quad}\text{Br}_2 \rightarrow 2\text{FeBr}_32Fe+Br2→2FeBr3
Calculate the relative formula mass (MrM_rMr) of iron(III) bromide, FeBr3\text{FeBr}_3FeBr3. Relative atomic masses (ArA_rAr): Fe=56\text{Fe} = 56Fe=56, Br=80\text{Br} = 80Br=80.