C) After reacting, each ion has a stable octet.
Explanation:
When Na reacts with chlorine gas to form the ionic compound NaCl, after the reaction, each ion has a stable octet.
- The driving force for every reaction is the tendency of the atoms to have completely filled outer energy levels like the noble gases.
- To achieve this configuration, an atom may lose or gain or share electrons.
- In this way, their shells become completely filled and they attain stability.
- In the reaction between Na and Cl, Na, a metal loses an electron. Na then will have a configuration similar to that of Ne, a noble gas.
- The electron is then gained by the chlorine atom and it mimics an argon atom.
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Answer:
<h2>line B</h2>
Explanation:
According to ohm's law V = IR where;
V i sthe supply voltage (in volts)
I = supply current (in amperes)
R = resistance (in ohms)
In order to calculate the line that is equal to 2ohms, we need to calculate the slope of each line using the formula.
For line B, R = ΔV/ΔI
R = V₂-V₁/I₂-I₁
R = 14.0-4.0/7.0-2.0
R = 10.0/5.0
R = 2.0ohms
Since the slope of line B is equal to 2 ohms, this shows that the line B is the one that represents the 2ohms resistor.
D) decreasing temperature and increasing luminosity indicates a stellar evolution. This answer based on the axes of the Hertzsprung-Russell Diagram which describe the stellar evolution trend<span>. The X axis in the diagram indicates the decreasing of star's temperature. The Y axis in the diagram indicates the increasing of star's luminosity.</span>
Givens
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F1 = 785 N on earth
F2 = Force on Sun
F3 = Force on Star
r_earth = 6371 km
r_sun = 695 700 km
r_star = 15/2 km = 7.5 km
m_earth = 5.972 * 10^24 kg
m_sun = 2 * 10^30 kg
Formula
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F_sun / F_earth = G *m_test * m_sun/(r_sun)^2 // G * m_test *m_earth / (re)^2
Again, there are cancellations
F_sun/F _ earth = [m_sun/m_earth ] * [(r_sun)^2 / (r_earth)]^2
Substitution and solution
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F_sun = 785 * (2*10^30 / 6*10^24) * (695700)^2 / (6371)^2 Note the radii do not have to be converted since the conversions would cancel anyway.
Solving this mess gives
F_sun = 3.12 * 10^12 Note I have rounded. You can put in the exact number.
This may not seem possible, but I don't think I've made an error. Now you go through the same process for the star. I leave that for you
Action and reaction forces act on different objects in the interaction. Two equal and opposite forces acting upon the same object don't create a pair(action-reaction). That's why they don't cancel each other out.