A solution's pH will be a number between 0 and 14. A solution with a pH of 7 is classified as neutral. If the pH is lower than 7, the solution is acidic. When pH is higher than 7, the solution is basic. These numbers describe the concentration of hydrogen ions in the solution and increase on a negative logarithmic scale. For example, If Solution A has a pH of 3 and Solution B has a pH of 1, then Solution B has 100 times as many hydrogen ions than A and is therefore 100 times more acidic.
Iron, magnesium, zinc, aluminum. I don’t know of any others
Seven elements make up the compound
To answer this question, all you to do is to divide the mass by the molar mass and that should get you your moles.
![=63g\ NH_{4}\ x\ \frac{1\ mol\ NH_{4}}{18g\ NH_{4}}](https://tex.z-dn.net/?f=%3D63g%5C%20NH_%7B4%7D%5C%20x%5C%20%5Cfrac%7B1%5C%20mol%5C%20NH_%7B4%7D%7D%7B18g%5C%20NH_%7B4%7D%7D)
<em>= 3.5 mol NH₄</em>
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