Question 10
Look at these symbol equations. Which of these match with which of the word equations you wrote earlier?
Word descriptions: **1a** iron + oxygen → iron oxide; **1b** sodium oxide + water → sodium hydroxide; **1c** iron + sulfur → iron sulfide; **1d** zinc + sulfur → zinc sulfide.
**a** $\mathrm{Zn+S\rightarrow ZnS}$
**b** $\mathrm{Na_2O+H_2O\rightarrow2NaOH}$
**c** $\mathrm{4Fe+3O_2\rightarrow2Fe_2O_3}$
**d** $\mathrm{Fe+S\rightarrow FeS}$
Word descriptions: **1a** iron + oxygen → iron oxide; **1b** sodium oxide + water → sodium hydroxide; **1c** iron + sulfur → iron sulfide; **1d** zinc + sulfur → zinc sulfide.
**a** $\mathrm{Zn+S\rightarrow ZnS}$
**b** $\mathrm{Na_2O+H_2O\rightarrow2NaOH}$
**c** $\mathrm{4Fe+3O_2\rightarrow2Fe_2O_3}$
**d** $\mathrm{Fe+S\rightarrow FeS}$
