In chemistry, state symbols are used to represent the physical state of reactants and products in chemical equations.
The table shows some physical changes. Complete the table to show the state symbol before and after each change.
| Physical Change | State symbol before change | State symbol after change |
|---|---|---|
| Gaseous butane is liquefied under pressure | ||
| Liquid candle wax cools and solidifies | ||
| Solid iodine sublimes when heated gently |
Some solid magnesium carbonate is added to a beaker of dilute hydrochloric acid.
Complete the equation for the reaction that occurs by writing the appropriate state symbol in each set of parentheses:
MgCO3(…… )+2HCl(…… )→MgCl2(…… )+H2O(…… )+CO2(…… ) \text{MgCO}_3(\dots\dots) + 2\text{HCl}(\dots\dots) \rightarrow \text{MgCl}_2(\dots\dots) + \text{H}_2\text{O}(\dots\dots) + \text{CO}_2(\dots\dots) MgCO3(……)+2HCl(……)→MgCl2(……)+H2O(……)+CO2(……)Which state symbol is used for both the metallic element mercury and the non-metallic element bromine at room temperature?
