Answer:
-1.06
Explanation:
0.345 has three significant figures since the zero does not represent a significant figure.
So, usign the calculator, we find ln (0.345) = -1.06421086195
Now, the problem says that you need to report your answer to three significant figures.
So, you should take the first three numbers of the answer:
ln (0.345) = -1.06
Answer:
Bacteria by binary fission
Starfish
Fungi
Explanation:
<u>Answer:</u> The correct answer is Potassium-39, Potassium-40, Potassium-41
<u>Explanation:</u>
Atomic number is defined as the number of protons present in an atom.
Mass number is defined as the sum of number of protons and number of neutrons present in an atom. It is represented as A.
A = Mass number = Number of neutrons + Number of protons.
For the given isotopes of potassium:
Atomic number of potassium is 19.
<u>For potassium-41 isotope:</u>
Mass number = 41
Number of neutrons = 41 - 19 = 22
<u>For potassium-39 isotope:</u>
Mass number = 39
Number of neutrons = 39 - 19 = 20
<u>For potassium-40 isotope:</u>
Mass number = 40
Number of neutrons = 40 - 19 = 21
The most number of neutrons are in potassium-41 isotope and the least number of neutrons are in potassium-39
Hence, the correct answer is Potassium-39, Potassium-40, Potassium-41
Answer:
- The <em>kinetic molecular theory explains the pressure exerted by gases </em>as the result of many collissions of the gas particles (atoms or molecules) with the walls of the vessel where they are contained.
- The pressure is the perpendicular force per unit area exerted by the gas particles when they hit the walls of the container.
Explanation:
As per the kinetic molecular theory, gases consist on a large number of tiny particles (atoms or molecules) in continuous rapid random motion.
The particles are so small that they are considered to have a negligible volume compared with the volume of the vessel where they are confined.
Since the number of molecules is so large, statistical approach can be applied.
The rapidly moving particles constantly collide among them and with the walls of the container. The collisions are considered elastic, which means that there is no loss of energy after the coliisions.
Applying classical (Newtonian) mechanic and the statistical approach, the kinetic theory calculates the <em>pressure exerted by gases as </em><u><em>the force exerted by the particles when they hit the walls of the container per unit of area.</em></u>
