Answer:
One or unity or 1
Explanation:
For example,
1 min =60 s
If we divide each side of the equation by 1 min, we get
If we divide each side of the equation by 60 s, we get
Answer:
<u>The last statement describes the correct inozation of water:</u>
Pure water at 25ºC:
- self-ionizes to form an equilibrium system in which:
Explanation:
It has been proven that <em>pure wate</em>r slightly conducts electricity. This fact, explained by the Arrhenius model of acids, would mean that pure water contains ions.
Since such ions are spontaneoulsy produced by the water molecules, this phenomenum is called <em>self-ionization of water</em>.
The equilibrium equation that represents the self-ionization of water is:
The expression for the equilibrium constant is:
As per the stoichiometry:
The equilibrium constant for the self-ionization of water has been determined at several temperatures. At 25ºC it is equal to 1.0×10⁻¹⁴.
Then by solving the equation you can find the concentrations of the ions:
Hence, we have proved that pure water self-ionizes to form an equilibrium system in which:
Answer:
- one battery
- two switches
- two resistors
- three light bulbs
Explanation:
Matching the description to the symbols shown below, we make the following correlations:
- circle with an X = light bulb; 3 are described
- small circle connected to another small circle = switch; 2 are described
- stack of horizontal lines (longer/shorter) = battery; 1 is described
- zigzag = resistor; 2 are described
Apparently, the diagram has 1 battery, 2 switches, 3 light bulbs, and 2 resistors.