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3 years ago

How does the law of conservation of mass apply to this reaction: Al + 3HCl → H2 + AlCl3 ?

Physics

2 answers:

11Alexandr11 [23.1K]3 years ago

8 0

Answer:

Only the hydrogen needs to be balanced. There are equal numbers of aluminum and chlorine.

Explanation:

I took the K12 test, listened to some other idiot and got it wrong, so this is the correct one.

Hope this helps!

melomori [17]3 years ago

3 0

Answer: Only the hydrogen needs to be balanced. There are equal numbers of aluminum and chlorine.

Explanation:

A balanced chemical equation always follow law of conservation of mass.

This law states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form. This also means that total number of individual atoms on reactant side must be equal to the total number of individual atoms on the product side.

For the given chemical equation, the balanced reaction follows:

$2Al+6HCl\rightarrow 3H_2+2AlCl_3$

On reactant side:

Number of aluminium atoms = 2

Number of hydrogen atoms = 6

Number of chlorine atoms = 6

On product side:

Number of aluminium atoms = 2

Number of hydrogen atoms = 6

Number of chlorine atoms = 6

Hence, only the hydrogen needs to be balanced. There are equal numbers of aluminum and chlorine.

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Please help me these are overdue for me!

nordsb [41]

The answer will be

(1) your answer is incorrect (the box gonna move right) coz less force or energy on the right

(2)unbalanced

(3)The Force acting on the rectangle are blanced

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(5) 10 N

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3 years ago

a body of mass 4 kg moves around a circle of radius 6 m with a constant speed of 12m/sec². calculate tw angular velocity and the

NeTakaya

Answer:

• Angular velocity is 2 m/s

• Centripetal force is 96 N

Explanation:

For angular velocity:

${ \rm{v = \omega r}}$

v is velocity
w is angular velocity
r is radius

${ \rm{ \omega = \frac{v}{r} }} \\ \\ { \rm{ \omega = \frac{12}{6} }} \\ \\ { \boxed{ \rm{ \omega = 2 \: {ms}^{ - 1} }}}$

For the centripetal force:

${ \rm{force = m { \omega}^{2}r }} \\ \\ { \rm{force = (4 \times {2}^{2} \times 6)}} \\ \\ { \rm{force = 96 \: newtons}}$

3 0

2 years ago

What occurs in the space when a massive object undergoes a change in its motion?

Lorico [155]

Gravitational waves are emitted in the space when a massive object undergoes a change in its motion.

Gravitational waves are emitted. Bends spacetime, ripples travel outward from a gravitational source at the speed of light. The more massive the object and greater its acceleration, the stronger the resulting gravitational wave.

Therefore, A change in motion produces gravitational waves.

Definition of Gravitational waves:

Gravitational waves are disturbances or ripples in the curvature of spacetime, generated by accelerated masses, that propagate as waves outward from their source at the speed of light.

To learn more about Gravitational waves here

brainly.com/question/12162022

#SPJ4

7 0

1 year ago

Suzie riding her bike is able to get her bike to 20m/s in just 5 seconds. What is her acceleration?

Delicious77 [7]

Answer:

Explanation:

because 20/5 is 4, which means that suzie's acceleration is 4. Hope I helped

6 0

3 years ago

um ima em forma de barra atravessa uma espira retangular, como mostra a imagem. Sabendo que esse e um caso em que o fluxo magnet

SashulF [63]

Answer:De acuerdo con la ley de inducción electromagnética de Faraday, la tasa de cambio del flujo magnético vinculado con la bobina es directamente proporcional a la fem inducida en la bobina.

e = - d∅ / dt

Entonces, si el cambio de flujo es mayor, la fem inducida es mayor.

¡espero haber ayudado a tener un buen día! :)

Explanation:

According to the Faraday's law of electromagnetic induction, the rate of change of magnetic flux linked with the coil is directly proportional to the induced emf in the coil.

e = - d∅ / dt

So, if the flux change is more the induced emf is more.

i hope i helped have a good day! :)

7 0

3 years ago