All categories

3 years ago

8.Which set of coefficients would

Physics

1 answer:

Viefleur [7K]3 years ago

3 0

Answer:

The set of coefficients that would correctly balanced the equation

NaCl → Na + Cl2 is the option D

(2,2,1)

Explanation:

In this reaction sodium chloride splits into sodium and chlorine.

For balancing the equation we should have number of atom of the element in the left hand side equal to the number of atom of the same element in the right-hand side.

so here in left hand side only one sodium and one chlorine is given and in the right-hand side one sodium and two chlorine is given.

So for the balancing the equation both the side should be same.

So we will write the balanced equation as

2NaCl → 2Na + Cl2

So, right now it is balanced that is two sodium and two chlorine on the left hand side as well as the right hand side.

Hence the coefficients are

2, 2, 1

You might be interested in

What effect do impurities have on the crystal lattice? Why does that result in the lowering of the melting point of a solid?

s344n2d4d5 [400]

Answer:

It reduces the melting point due to a defect in the arrangement of the crystal lattice.

Explanation:

The presence of impurities creates a disorderliness in the uniformity of the crystal structure. It lowers the melting point by a few degrees because it becomes easier to overcome the intermolecular force of attraction.

It makes the array of crystals disordered.

Lattice is a long chain three-dimensional arrangement of the molecules, atoms or ions in a crystal structure.

3 0

4 years ago

Which circuit element is of special importance in AC circuits?

Norma-Jean [14]

Answer:

Explanation:capacitor

8 0

3 years ago

Read 2 more answers

A uniform cylinder of radius 10 cm and mass 20 kg is mounted so as to rotate freely about a horizontal axis that is parallel to

fomenos

Answer:

a. 0.15 kg m2

b. 19.8 rad/s

Explanation:

Metric unit conversion:

10 cm = 0.1 m

5 cm = 0.05 m

a. Using parallel axis theorem, the rotational inertia of the cylinder about the axis of rotation is the inertia about the longitudinal axis plus the product of mass and distance from the longitudinal axis to the rotational axis squared

$I = I_L + md^2$

whereas the inertia about the longitudinal axis of the solid cylinder is

$I_L = mr^2/2 = 20*0.1^2/2 = 0.1 kgm^2$

$md^2 = 20*0.05^2 = 0.05 kgm^2$

$I = I_L + md^2 = 0.1 + 0.05 = 0.15 kg m^2$

b. Assume the cylinder does not rotate about its own longitudinal axis, we can treat this as a point mass pendulum. So when it's being released from 0.05m high (release point) to 0m (lowest position), its potential energy is converted to kinetic energy:

$E_p = E_k$

$mgh = mv^2/2$

where h = 0.05 is the vertical distance traveled, v is the cylinder linear velocity at the lowest position.g = 9.81m/s2 is the gravitational acceleration.

We can divide both sides by m

$gh = v^2/2$