Answer: Ice is less dense than water.
Explanation: As water freezes, it expands, making it less dense. This is why ice cubes float in a glass of water.
I believe the correct response is A. At higher elevations it would take less time to hard boil an egg, because there is less atmospheric pressure.
Answer:
Activation energy is the amount of energy required to convert the reactants into the activated complex (option B)
Explanation:
The activation energy is the minimum needed energy to make a reaction occurs. When the reaction occurs, the molecules of reactants joins together in a determined position, so when they bond all the molecules reactants, they make the activated complex. That's why we say, that the energy needed to make the molecules of reactants form the activated complex is finally the <em>activation energy</em>.
When the activated complex is formed, there is a few moment with all the molecules from reactants bonding together. By the end, they are separated so the products are been formed.
Answer:
The final volume of the gas is 36.1 L.
Explanation:
Given:
Initial pressure of the gas is, 
Final pressure of the gas is, 
Initial volume of the gas is, 
Final volume of the gas is, 
Here, we shall use Boyle's Law which states that for a process under constant temperature, the pressure of the gas changes inversely with the change in volume.
Here, the pressure is increased. So, the volume of the gas is decreased.
Therefore, as per Boyle's Law:
So, the final volume of the gas is 36.1 L.
To solve the question you use the following formula:
concentration (1) × volume (1) = concentration (1) × volume (1)
3 M × volume (1) = 1.8 M × 50 mL
volume (1) = (1.8 M × 50 mL) / 3 M = 30 mL
