Answer: Option (B) is the correct answer.
Explanation:
Activation energy is the minimum amount of energy required to start or initiate a chemical reaction.
More is the activation energy more difficult is it for the reactants to participate in reaction.
Whereas a catalyst helps in increasing the rate of a reaction by increasing the energy of reactant molecules so that they can cross the activation energy barrier and therefore, formation of products become faster.
Thus, we can conclude that activation energy affect a chemical reaction as it determines how difficult it is to start the reaction.
Answer:
<u>Heating water with an open flame</u>
<u>Explanation:</u>
Remember, we are told in the label that Acetone is a "flammable liquid and vapor." <em>Being flammable means the substance can easily be set on fire</em>, and we would expect an open flame from heating water to trigger an explosion (a disaster) in which the Acetone is set on fire causing life-threatening dangers to the second group of students.
Answer:
The answer is
<h2>17.63 mL</h2>Explanation:
The volume of a substance when given the density and mass can be found by using the formula
From the question
mass of lead = 200 g
density = 11.342 g/cm³
It's volume is
We have the final answer as
<h3>17.63 mL</h3>Hope this helps you