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3 years ago

When sodium reacts with chlorine, sodium chloride is produced. Andrew represented this reaction with this equation:

Physics

2 answers:

vichka [17]3 years ago

6 0

Answer: B) Not Balanced

B) Sodium

B) Not Equal

Explanation:

kvv77 [185]3 years ago

4 0

<h3>Answer;</h3>

B) Not Balanced

B) Sodium

B) Not Equal

The equation is not balanced because the number of sodium atoms is not equal on both sides of the arrow.

<h3>Explanation;</h3>

According to the law of conservation of mass, the mass of reactants should always be the same as the mass of the products in a chemical equation. Therefore, the number of atoms of each element in a chemical equation should always be the same on both sides of the equation, that is the side of reactants and side of products.
Therefore,any chemical equation requires balancing to ensure that the number of atoms of each element is equal in both sides of the equation. Balancing is a try and error process that ensures that the law of conservation of mass holds.
Thus, the balanced chemical equation is;

2Na + Cl2 → 2NaCl

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A wind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. Its blades are 20 m in length. (a) What is

nlexa [21]

Answer:

-0.314 rad/s²

197.39 m/s²

197.49 m/s² and 1.822° counterclockwise.

Explanation:

$\omega_f$ = Final angular velocity

$\omega_i$ = Initial angular velocity

$\alpha$ = Angular acceleration

$\theta$ = Angle of rotation

t = Time taken

R = Radius = 20 m

$\omega_i=0.5\times 2\pi\\\Rightarrow \omega_i=\pi$

$\omega_f=\omega_i+\alpha t\\\Rightarrow \alpha=\frac{\omega_f-\omega_i}{t}\\\Rightarrow \alpha=\frac{0-\pi}{10}\\\Rightarrow a=-0.314\ rad/s^2$

Angular acceleration of the turbine is -0.314 rad/s²

Centripetal acceleration

$a_c=\omega_i^2R\\\Rightarrow a_c=(\pi)^2\times 20\\\Rightarrow a_c=197.39\ m/s^2$

The centripetal acceleration of the tip is 197.39 m/s²

Tangential acceleration

$a_t=\alpha R\\\Rightarrow a_t=-0.314\times 20\\\Rightarrow a_t=-6.28\ m/s^2$

Acceleration

$a=\sqrt{a_c^2+a_t^2}\\\Rightarrow a=\sqrt{197.39^2+(-6.28)^2}\\\Rightarrow a=197.49\ m/s^2$

$\theta=tan^{-1}\frac{|a_t|}{|a_c|}\\\Rightarrow \theta=tan^{-1}\frac{6.28}{197.39}\\\Rightarrow \theta=1.822^{\circ}$

Magnitude and direction of the total linear acceleration of the tip of the blades is 197.49 m/s² and 1.822° counterclockwise.

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3 years ago

A rugby player runs with the ball directly toward his opponent's goal, along the positive direction of an x axis. He can legally

Katyanochek1 [597]

Answer:125.68°

Explanation:

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3 years ago

The electron dot diagram for a neutral atom of chlorine (atomic number 17) is shown below. Which of the following symbols repres

rosijanka [135]

The answer is A.

Chlorine is found in group7A of the periodic table. This means that when they are neutral, (electrons and protons are equal), they lack 1 electron to complete the octet or eight valence electrons to be stable. This will result in Chlorine having to gain an electron. Since it gained an electron, that means the electrons outnumber the protons by 1, which will result in a negative charge of -1.

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3 years ago

The gravitational force between two asteroids is 1,000,000 n. what will the force be if the distance between the asteroids is do

Alina [70]

To solve this problem, we use the formula:

F = G m1 m2 / r^2

where F is gravitational force, G is constant, m1 and m2 are masses while r is the distance between the two asteroids

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F1 r1^2 = F2 r2^2

So if r2 = 2 r1:

(1,000,000 N) (r1^2) = F2 * (2 r1)^2

F2 = 250,000 N

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3 years ago

Which of the statements below describes how a motor operates

uranmaximum [27]

Answer:

need Read this excerpt from "Not a Dove, But No Longer a Hawk."

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The author acknowledges that the violence should stop, but admits that a retreat might have dire consequences.

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Explanation:

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