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3 years ago

7. What are the three ways that compounds can become soluble?

Physics

1 answer:

jonny [76]3 years ago

8 0

Answer:

Ionic compounds dissolve in water if the energy given off when the ions interact with water molecules compensates for the energy needed to break the ionic bonds in the solid and the energy required to separate the water molecules so that the ions can be inserted into solution.

You might be interested in

Why is boiling water considered a physical change?

Liono4ka [1.6K]

Answer:

Boiling water is an example of a physical change and not a chemical change because the water vapor still has the same molecular structure as liquid water.

(credits to lumenlearning)

Explanation:

7 0

3 years ago

Read 2 more answers

object of mass m=2.6 kg is dropped from rest at a height of h above a massless spring with spring constant k=494.3 N/m that is i

tekilochka [14]

Answer:

3.56 m

Explanation:

As the object falls from height h, and then compresses the spring a distance of 0.66m, its initial potential energy is converted into elastics energy of the spring.

Let g = 9.81m/s2. Knowing that the total change in potential height is h + d, we have the following equation

$E_p = E_s$

$mg(h + d) = kd^2/2$

$2.6*9.81(h + 0.66) = 494.3*0.66^2/2$

$h + 0.66 = 4.22$

$h = 4.22 - 0.66 = 3.56 m$

3 0

3 years ago

A horizontal force of magnitude 46.3 n pushes a block of mass 4.14 kg across a floor where the coefficient of kinetic friction i

IrinaVladis [17]

A) Calling F the intensity of the horizontal force and d the displacement of the block across the floor, the work done by the horizontal force is equal to
$W=Fd = (46.3 N)(4.25 m)=196.8 J$

b) The work done by the frictional force against the motion of the block is equal to:
$W_f = -F_f d =- (\mu mg) d =-(0.609)(4.14 kg)(9.81 m/s^2)(4.25 m)=$
$=-105.1 J$
Part of these 105.1 Joules of work becomes increase of thermal energy of the block ( $\Delta E_B$ ), and part of it becomes increase of thermal energy of the floor ( $\Delta E_F$ ). We already know the increase in thermal energy of the block (38.2 J), so we can find the increase in thermal energy of the floor:
$\Delta E_F = 105.1 J - \Delta E_B = 105.1 J-38.2 J=66.9 J$

c) The net work done on the block is the work done by the horizontal force F minus the work done by the frictional force (the frictional force acts against the motion, so we must take it with a negative sign):
$W_{net}=W-W_f=196.8 J-105.1 J=91.7 J$
For the work-energy theorem, the work done on the block is equal to its increase of kinetic energy:
$W_{net} = \Delta K$
So, we have $\Delta K=+91.7 J$

5 0

4 years ago

Features like the Grand Canyon are good examples of the power of water to _____. A. reduce erosion B. change course suddenly C.

Yuliya22 [10]

Answer:

I believe the answer is C.

Explanation:

8 0

4 years ago

Read 2 more answers

A bow accelerates a 100g arrow at 50m/s calculate the force acting on the arrow in Newton’s

Norma-Jean [14]

Answer:

Explanation:

Newton's law states that F=mg, or in other applications F=ma, where:

F= force acting on the system

m= mass of the system and

a= acceleration (or g= gravitational acceleration which is 9.8m/s^2)

In your question we know the following variables:

The mass of the arrow (m= 100g, however we should use kilograms- 0.1kg)

The acceleration of the arrow (a=50m/s^2)

If we substitute these values into our given equation, we can find the force acting on the arrow.

F = m x a

F= (0.1) x (50)

F = 5N

hope this helps :)

5 0

4 years ago