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Elina [12.6K]
4 years ago
13

Which is a question which science cannot answer? How does the moon affect tides on earth? How long does it take for the earth to

rotate on its axis? When will the next earthquake happen? Why do volcanoes erupt?
Chemistry
2 answers:
Orlov [11]4 years ago
6 0
<h2>Answer:</h2><h3>Part 1.</h3>

Science cannot answer the presence of God.

<h3>Part 2.</h3>
  • The gravitational attraction of the moon causes the oceans to bulge out in the direction of the moon.
  • Another bulge occurs on the opposite side, since the Earth is also being pulled toward the moon and away from the water on the far side.
  • Since the earth is rotating while this is happening, two tides occur each day.
<h3>Part 3.</h3>

<em>23 hours and 56 minutes.</em>

  • In this time all the stars appear to revolve once around the Earth and return to their starting positions.
<h3>Pat 4.</h3>
  • Next earthquake prediction can be made by earthquake prediction which is a branch of the science of seismology concerned with the specification of the time, location, and magnitude of future earthquakes within stated limits, and particularly "the determination of parameters for the next strong earthquake to occur in a region.
  • An earthquake is the shaking of the surface of the Earth, resulting from the sudden release of energy in the Earth's lithosphere that creates seismic waves.
<h3>Part 5.</h3>

Volcanoes erupt because of density and pressure. The lower density of the magma relative to the surrounding rocks causes it to rise (like air bubbles in syrup).

It will rise to the surface or to a depth that is determined by the density of the lawa and the weight of the rocks above it.

<h3 />
JulijaS [17]4 years ago
3 0

Till now we are able to find

a)  How does the moon affect tides on earth? : the answer is moon gravitational field

b) How long does it take for the earth to rotate on its axis? : we know the answer is 24 hours (a day)

c) Why do volcanoes erupt? : due to divergence / convergence of tectonic plates

However we still cannot predict "When will the next earthquake happen?" based on science

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satela [25.4K]

Answer is A. Krill

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6 0
3 years ago
In the periodic table which of these elements has the smallest atomic radius ?
vivado [14]
I think its Helium correct me if I'm wrong plz. 
7 0
3 years ago
Silver chloride is virtually insoluble in water so that the reaction appears to go to completion. How many grams of solid NaCl m
masya89 [10]

Answer:

0.535 g

Explanation:

The reaction that takes place is:

  • NaCl + AgNO₃ → AgCl + NaNO₃

First we <u>calculate how many AgNO₃ moles are there in 25.0 mL of a 0.366 M solution</u>, using the <em>definition of molarity</em>:

  • Molarity = moles / liters
  • moles = Molarity * liters

<em>Converting 25.0 mL to L </em>⇒ 25.0 / 1000 = 0.025 L

  • moles = 0.366 M * 0.025 L = 0.00915 mol AgNO₃

Then we <u>convert AgNO₃ moles into NaCl moles</u>:

  • 0.00915 mol AgNO₃ * \frac{1molNaCl}{1molAgNO_3} = 0.00915 mol NaCl

Finally we<u> convert NaCl moles into grams</u>, using its <em>molar mass</em>:

  • 0.00915 mol NaCl * 58.44 g/mol = 0.535 g
4 0
3 years ago
22. A flask containing 450 mL of 0.50 M H2SO4 was accidentally knocked to the floor. How many grams of NaHCO, do you need to put
Dvinal [7]

<u>Answer:</u> The correct answer is Option D.

<u>Explanation:</u>

To calculate the moles of a solute, we use the equation:

\text{Molarity of the solution}=\frac{\text{Moles of solute}}\text{Volume of solution (in L)}}

We are given:

Volume of sulfuric acid = 450mL = 0.45 L      (Conversion factor: 1 L = 1000 mL)

Molarity of the solution = 0.5 moles/ L

Putting values in above equation, we get:

0.5mol/L=\frac{\text{Moles of sulfuric acid}}{0.45L}\\\\\text{Moles of sulfuric acid}=0.225mol

For the given chemical reaction:

H_2SO_4(aq.)+2NaHCO_3(aq.)\rightarrow Na_2SO_4(aq.)+2H_2O(l)+2CO_2(g)

By Stoichiometry of the reaction:

1 mole of sulfuric acid reacts with 2 moles of sodium bicarbonate.

So, 0.225 moles of sulfuric acid will react with = \frac{2}{1}\times 0.225=0.45mol of sodium bicarbonate

To calculate the mass of sodium bicarbonate, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Moles of sodium bicarbonate = 0.45 moles

Molar mass of sodium bicarbonate = 84.007 g/mol

Putting values in above equation, we get:

0.45mol=\frac{\text{Mass of sodium bicarbonate}}{84.007g/mol}\\\\\text{Mass of sodium bicarbonate}=38g

Hence, the correct answer is Option D.

7 0
3 years ago
How many atoms does a molecule of sodium chloride contain?
murzikaleks [220]
2, for every one Na you will have 1 Cl.

8 0
3 years ago
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