hydrogen peroxide can be used to disinfect and clean surfaces around the home. it breaks down over time into…
hydrogen peroxide can be used to disinfect and clean surfaces around the home. it breaks down over time into oxygen gas and water.\nconsider the following reaction:\nsome amount of hydrogen peroxide (h₂o₂) breaks down to produce 5 molecules of oxygen (o₂) and 10 molecules of water (h₂o).\ncomplete the table below.\n| chemical element | number of atoms in the reaction |\n| ---- | ---- |\n| h | |\n| o | |\nduring this reaction, how many molecules of hydrogen peroxide (h₂o₂) react?
Answer
Explanation:
Step1: Calculate number of H atoms
Each water molecule ($H_2O$) has 2 H - atoms. There are 10 water molecules. So the number of H atoms from water is $2\times10 = 20$. There are no H - atoms in oxygen ($O_2$). So the total number of H atoms in the reaction is 20.
Step2: Calculate number of O atoms
Each oxygen molecule ($O_2$) has 2 O - atoms. There are 5 oxygen molecules, so the number of O atoms from oxygen is $2\times5=10$. Each water molecule ($H_2O$) has 1 O - atom. There are 10 water molecules, so the number of O atoms from water is $1\times10 = 10$. The total number of O atoms is $10 + 10=20$.
Step3: Determine number of $H_2O_2$ molecules
The chemical formula of hydrogen peroxide is $H_2O_2$. Since there are 20 H atoms and 20 O atoms in the products, and each $H_2O_2$ molecule has 2 H atoms and 2 O atoms, the number of $H_2O_2$ molecules is 10.
Answer:
| Chemical element | Number of atoms in the reaction |
|---|---|
| H | 20 |
| O | 20 |
| Number of $H_2O_2$ molecules that react: 10 |