Soru
Check the equations that are correctly balanced. Al+3Br_(2)arrow AlBr_(3) H_(2)O+2O_(2)arrow H_(2)O_(2) CaCO_(3)arrow CaO+CO_(2) Fe_(2)O_(3)+3H_(2)arrow 2Fe+3H_(2)O
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Ege
Profesyonel · 6 yıl öğretmeniUzman doğrulaması
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To determine which equations are correctly balanced, we need to ensure that the number of atoms of each element is the same on both sides of the equation.<br /><br />1. \( \text{Al} + 3\text{Br}_2 \rightarrow \text{AlBr}_3 \)<br /><br /> - Left side: 1 Al, 6 Br<br /> - Right side: 1 Al, 3 Br<br /><br /> This equation is not balanced because there are 6 bromine atoms on the left and only 3 on the right.<br /><br />2. \( \text{H}_2\text{O} + 2\text{O}_2 \rightarrow \text{H}_2\text{O}_2 \)<br /><br /> - Left side: 2 H, 5 O<br /> - Right side: 2 H, 2 O<br /><br /> This equation is not balanced because there are 5 oxygen atoms on the left and only 2 on the right.<br /><br />3. \( \text{CaCO}_3 \rightarrow \text{CaO} + \text{CO}_2 \)<br /><br /> - Left side: 1 Ca, 1 C, 3 O<br /> - Right side: 1 Ca, 1 C, 3 O<br /><br /> This equation is balanced.<br /><br />4. \( \text{Fe}_2\text{O}_3 + 3\text{H}_2 \rightarrow 2\text{Fe} + 3\text{H}_2\text{O} \)<br /><br /> - Left side: 2 Fe, 3 O, 6 H<br /> - Right side: 2 Fe, 3 O, 6 H<br /><br /> This equation is balanced.<br /><br />Therefore, the correctly balanced equations are:<br /><br />- \( \text{CaCO}_3 \rightarrow \text{CaO} + \text{CO}_2 \)<br />- \( \text{Fe}_2\text{O}_3 + 3\text{H}_2 \rightarrow 2\text{Fe} + 3\text{H}_2\text{O} \)
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