|Typically, ____ (pH 2.5) contains 5% acetic acid by volume.
|The core of a pencil contains ____ (made of carbon not lead).
|Mixing HCl and NaOH produces ____ (table salt) and water.
|Milk (pH 6.7) is slightly acidic because it contains ____.
|The solid form of carbon dioxide (CO2) is ____.
|Iron can oxidize to iron oxide, which is also known as ____.
|Hard water contains ____ and magnesium ions.
|Dioxygen (O2) and ____ (O3) are allotropes of oxygen.