All categories

4 years ago

What is the main cause of an earthquake

Chemistry

2 answers:

Natali5045456 [20]4 years ago

4 0

Answer:

I thinks it's stress caused by plate movement hope this helps

sergij07 [2.7K]4 years ago

3 0

Answer: stress caused by plate movement

Explanation:

Earthquakes are caused by the movement of tectonic plates, the different types of movements being divergent, convergent and transform.

Divergent boundaries: where new crust is generated as the plates pull away from each other.

Convergent boundaries: where crust is destroyed as one plate dives under another.

Transform boundaries: where crust is neither produced nor destroyed as the plates slide horizontally past each other.

You might be interested in

A distance-time graph indicates that an object travels 2 m in 2 s and then travels another 30 m during the next 40 s.

Doss [256]

Answer:

$\boxed{\text{0.76m/s}}$

Explanation:

$\text{Average speed} = \dfrac{\text{total distance}}{\text{total time}}$

Total distance = 2 m + 30 m = 32 m

Total time = 2 s + 40 s = 42 s

$\text{Average speed} = \dfrac{\text{32 m}}{\text{42 s}} = \textbf{0.76 m/s}\\\text{The average speed of the object is $\boxed{\textbf{0.76m/s}}$}$

5 0

4 years ago

A saturated solution of copper (II) hydroxide is prepared in a beaker by adding the solid to water and stirring. When the soluti

12345 [234]

Answer:

addition of aqueous hydrochloric acid

Explanation:

The solubility of copper (ll) hydroxide in water is negligible. This implies that the substance is only slightly soluble in water.

However, the addition of aqueous hydrochloric acid leads to the following reaction;

Cu(OH)2 + 2HCl ---------> CuCl2 + 2H2O

Copper II chloride is soluble in water hence the crystals dissolve when stirred. and the molar solubility increases.

8 0

3 years ago

the mass by mass percentage of a solution is 20%. find the mass of the solute dissolved in 500g of solution

GuDViN [60]

Answer:

$m_{solute}=100g$

Explanation:

Hello,

In this case, by considering the mathematical definition of by mass percentage of a solute as shown below:

$\%m/m=\frac{m_{solute}}{m_{solution}}*100\%$

We are able to compute the mass of the solute in a 20% solution having 500 g of solution as follows:

$m_{solute}=\frac{m_{solution}*\%m/m}{100\%} =\frac{500g*20\%}{100\%}\\ \\m_{solute}=100g$

Best regards.

6 0

3 years ago

Bob, Jill, Kim, and Steve measure an object's length, density, mass, and brightness, respectively. Which student must derive a u

ValentinkaMS [17]

Answer:

The answer is Bob

Explanation:

The science exist to kinds of measurements base units and derive units of measurement.

Base units are the ones that measure: length, mass, time, electric current, temperature, luminous intensity and amount of substance.

Derivative units of measurement are obtain when we combine the base units.

Know from your question

Bob measures length is a base unit

Jill measures density is a derivative unit, is the combination of mass and volumen

Kim measures mass is a base unit

Steve measures brightness is a base unit.

8 0

3 years ago

a solution of unknown molecular substance is prepared by dissolving 0.50g of the unknown in 8.0g of benzene. the solution freeze

spayn [35]

Answer:

THE MOLAR MASS OF THE UNKNOWN MOLECULAR SUBSTANCE IS 200 G/MOL.

Explanation:

Mass of the unknown substance = 0.50 g

Freezing point of the solution = 3.9 °C

Freezing point of pure benzene = 5.5 °C

Freezing point dissociation constant Kf = 5.12°C/m

First, calculate the temperature difference between the freezing point of pure benzene and the final solution freezing point.

Change in temperature = 5.5 -3.9 = 1.6 °C

Next is to calculate the number of moles or molarity of the compound that dissolved.

Using the formula:

Δt = i Kf m

Assume i = 1

So,

1.6 °C = 1 * 5.12 * x/ 0.005 kg of benzene

x = 1.6 * 0.008 / 5.12

x = 0.0128 / 5.12

x = 0.0025 moles.

Next is to calculate the molar mass using the formula, molarity = mass / molar mass

Molar mass = mass / molarity

Molar mass = 0.50 g /0.0025

Molar mass = 200 g/mol

Hence, the molar mass of the unknown compound is 200 g/mol

6 0

3 years ago