Answer: С
. The temperature increases by about 12°C and then decreases by about 12°C.
Explanation:
Temperatures around the world have been on the rise since the Industrial revolution as humans clog the planet with Carbon Dioxide and other pollutants. This had led to a rise in temperatures that has seen ice levels fall and sea levels rise around the world.
Temperature fluctuations on the other hand are not a new thing. Studies show that in Antarctica temperatures from about 440,000 years ago to about 340,000 years ago increased by 12°C and then decreased by about 12°C.
Answer:
16.96 moles of sodium will needed to react with 4.24 moles of oxygen gas.
Explanation:
Moles of oxygen gas = 4.24 moles
According to reaction , 1 mole of oxygen gas reacts with 4 moles of sodium.
Then 4.24 moles of oxygen gas will react with :
of sodium
16.96 moles of sodium will needed to react with 4.24 moles of oxygen gas.
The atmospheric pressure will be:
The pressure of the atmosphere resulting from the mercury column is 0.959 atm
What is atmospheric pressure?
The force that an object experiences from the weight of the air above it per unit area are known as atmospheric pressure.
Given: Height of mercury column = 729 mm Hg
To find: The pressure of the atmosphere
Calculation:
The atmospheric column resulting from the mercury column is calculated as follows:
1 atm =760 mm Hg
So, we can convert the 729 mm Hg to atm, and we get
Atmospheric pressure = 729 x 1 atm / 760 = 0.959 atm
Learn more about atmospheric pressure here,
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<u>Answer: </u>The correct answer is
<u>Explanation:</u>
Exothermic reactions are defined as the reactions in which heat energy is released during a chemical reaction. In these reactions, energy of the products is less than the energy of the reactants. for these reactions are ought to be negative.
In these chemical reactions, energy term is written on the product side.
From the given chemical reactions, only one reaction satisfies the above information. The chemical reaction is:
<span>Heat would make the molecules move faster so they would spread out therefore making air less dense.
Less dense means less packed. Heat increase the kinetic energy</span>