Rate of the reaction is represented as
Rate=k[A][B]
Rate represents change in product concentration with time that has a unit Ms- Whereas concentration of each reactant can be represented as M . so the expression will become:
Ms-1=k[M][M]
k=M-1 s-1.
The experimental investigations allow for the control of variables.
<h3>What is control of variables?</h3>
The control of variables is the experimental element that remains constant and unchanged throughout the experiment of the investigation.
The control of variables is held constant during the experiment to test the relation between the dependent and independent variables.
Thus, An experimental investigation allows the control of variables all the time.
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Answer:
2.765amu is the contribution of the X-19 isotope to the weighted average
Explanation:
The average molar mass is defined as the sum of the molar mass of each isotope times its abundance. For the unknown element X that has 2 isotopes the weighted average is defined as:
X = Mass X-19 * Abundance X-19 + MassX-21 * Abundance X-21
The contribution of the X-19 isotope is its mass (19.00 amu) times its abundance (14.55% = 0.1455). That is:
19.00amu * 0.1455 =
2.765amu is the contribution of the X-19 isotope to the weighted average
Answer:
C. attaching an active metal to make the pipe the cathode in an electrochemical cell.
Explanation:
Cathodic protection is a technique which helps in controlling the increased rate of corrosion of a metal surface by making it the cathode of an electrochemical cell. It connects the metal to be protected to a more easily corroded which is usually referred to as the sacrificial metal to act as the anode.
This technique preserves the metal by providing a highly active metal that can act as an anode and provide free electrons. By introducing these free electrons, the active metal sacrifices its ions and keeps the less active steel from corroding.