Explain how scientific advancements have lessened the effects of hazardous events on society.
Answers
Answer:
Scientific advancements can detect some harmful events before they occur and it allows the society to plan for them, thereby reducing the risk of damage that occurs.
Explanation:
Scientific advancements reduce the natural disasters level in a region by evaluating the physical and chemical characteristics of the land.
Also, it develops new medical terminology and concepts that reduce the spread of hazardous diseases in society.
Satellites are used to predict the weather report and by using this report proper precautions can be taken at the time of floods and storms.
Construction of dams and canals highly reduced the risk of water overflowing in the lands.
Answer: Scientists are able to detect and predict some hazardous events through scientific advancements. By detecting these events early, society can prepare for the events, thereby reducing the amount of damage to people and property caused by the hazardous event.
Explanation: This is the exact answer on edge2020
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Answers
As the astronaut moved away from Earth, the gravitational force between Earth and the astronaut will decrease.
What is the gravitational force?
The gravitational force can be described as a force that attracts any two objects having mass. The gravitational force is an attractive force because it always tries to pull masses together, it never pushes objects apart.
In the universe, each object with mass attracts every other object with a certain force, and that attraction force is directly proportional to the product of the masses of those objects.
The objects that are far apart from each other, don't pull on each other but the force is there and we can calculate it from the Gravitational Force Formula,
F = Gm₁m₂/r²
Where F is the gravitational force between two objects, m₁ is the mass of the first object, m₂ is the mass of the second object and 'r' is the distance between the centers of two objects.
The earth pulls everything towards itself because of the gravitational force. As the astronaut moved away from the earth the influence gravitational force of the earth or gravity will decrease.
Learn more about gravitational force, here:
#SPJ5
Answers
Answer:
In of cobalt atoms there are
mol Co
Explanation:
Step 1 : Identify the relationship between 1 mole Cobalt and Avogadro's number of atoms.
Avogadro’s number is number of units present in one mole of any substance (defined as its molecular weight in grams)
Step 2: Divide the given atoms of cobalt by the number of atoms per mol.
Given atoms of cobalt is
Now by performing division
Number of moles of cobalt (Co) atoms in cobalt atoms is
=
=
=
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Answers
Answer:
Most astronomical objects, such as galaxies, stars, and planets
Explanation:
The structures of different types of cell organelles are similar.
The functions of most cell organelles are hindered by their structures.
The structure of a cell organelle is directly related to its function.
The function of a cell organelle can change over time.
Answers
Answer:
The correct answer will be option- The structure of a cell organelle is directly related to its function.
Explanation:
The cell wall is a layer formed around the plasma membrane of the plant cell which helps plant cell by providing stiffness and support to the cell. This cell wall provides protection to the plant cells.
Since the presence of cell wall around the plasma membrane shows that it has a specific function and serves an important function of the plant cell, similarly the structure of various organelles present in the cell is related to their function. The best-known example is the inner folding of the mitochondria called cristae to increase the surface area.
Thus, the selected option is the correct answer.
1.5 mol H20
2.5 mol H20
O 3.5 mol NO2
O 1.0 mol NO2
Answers
Answer:
3.5 moles of NO2.
Explanation:
The balanced equation for the reaction is given below:
3NO2 + H2O —> NO + 2HNO3
Next, we shall determine the excess reactant. This is illustrated below:
From the balanced equation above,
3 moles of NO2 reacted with 1 moles H2O.
Therefore, 6.5 moles of NO2 will react with = (6.5 x 1)/3 = 2.17 moles of H2O.
From the above calculations, we can see that it will take a higher amount i.e 2.17 moles than what was given i.e 1 mole of H2O to react completely with 6.5 moles of NO2.
Therefore, NO2 is the excess reactant and H2O is the limiting reactant.
Next, we shall determine the number of mole of the excess reactant that reacted in the reaction. This is illustrated below:
From the balanced equation above, we can see that 3 moles of NO2 reacted with 1 mole of H2O.
Finally, we shall determine the leftover mole of the excess reactant after the reaction. This is illustrated below:
Given mole of NO2 = 6.5 moles
Reacted mole of NO2 = 3 moles
Leftover mole of NO2 =...?
Leftover mole = Given mole – Reacted mole
Leftover mole of NO2 = 6.5 – 3
Leftover mole of NO2 = 3.5 moles.
Therefore, 3.5 moles of NO2 remained after the reaction.
fire, how many molecules of CO2 did you Create?
Answers
Answer:
975.56×10²³ molecules
Explanation:
Given data:
Number of molecules of C₂H₆ = 4.88×10²⁵
Number of molecules of CO₂ produced = ?
Solution:
Chemical equation:
2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O
Number of moles of C₂H₆:
1 mole = 6.022×10²³ molecules
4.88×10²⁵ molecules×1mol/6.022×10²³ molecules
0.81×10² mol
81 mol
Now we will compare the moles of C₂H₆ with CO₂.
C₂H₆ : CO₂
2 : 4
81 : 4/2×81 = 162 mol
Number of molecules of CO₂:
1 mole = 6.022×10²³ molecules
162 mol ×6.022×10²³ molecules / 1 mol
975.56×10²³ molecules