Chemical equilibrium is a condition where the rate of product made is same as the rate of reactant made. Since the reaction to the left is same as the reaction to the right, so the amount of reactant and product will not be changed (doesn't mean that the amount is same, it just won't increase or decrease).
It's called equilibrium since there will be no change in their amount.
Aqueous solutions exhibits properties that cannot be found in pure liquids called the colligative properties. These properties are being affected by the presence of solute particles in the solution. The properties are the boiling point elevation, freezing point depression, osmotic pressure elevation and vapor pressure lowering. These properties are directly related to the concentration of the solute. Thus, as the concentration increases, the value of the properties would as well increase. For the case of freezing point, the solution which would contain more solute particles or highest concentration would be the solution that will have the lowest freezing point.
Most of the light passes through glass but none of the light passes through metal.
The answer would be B, 7 valence electrons. <span>F is located
in the 1s-orbital and the second energy level, which in fluorine's case
is the outermost energy level, meaning it has <span>7 electrons</span></span>
Answer: Payback time = 0.0075
Explanation: Since payback time is calculated as:
payback time =
First determine the installation cost:
100 mm thick insulation covers 8.3 m². Then 300 mm covers 24.9 m².
To cover 8.3m² costs £20. Then, the cost to cover 24.9 m² is:
cost =
cost = £60
The cost of putting the insulation is £120, so the total cost is:
total cost = £60 + £120
total cost = £180
Savings per year per 100 mm thick is £80. For 300 mm, the value of annual savings is:
savings =
savings = 240
payback time =
payback time =
payback time = 0.75