Answer:
The answer is
<h2>
![2.143 \times {10}^{18} \: \: atoms](https://tex.z-dn.net/?f=%202.143%20%5Ctimes%20%20%7B10%7D%5E%7B18%7D%20%20%5C%3A%20%20%5C%3A%20atoms)
</h2>
Explanation:
To find the number of atoms given the number of moles we use the formula
N = n × L
where
N is the number of entities
n is the number of moles
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question
![n = 3.559 \times {10}^{ - 6} \: mol](https://tex.z-dn.net/?f=n%20%3D%203.559%20%5Ctimes%20%20%7B10%7D%5E%7B%20-%206%7D%20%20%5C%3A%20mol)
Substitute the values into the above formula and solve
That's
<h3>
![N = 3.559 \times {10}^{ - 6} \times 6.02 \times {10}^{23} \\ = 2.1425 \times {10}^{18}](https://tex.z-dn.net/?f=N%20%20%3D%203.559%20%5Ctimes%20%20%7B10%7D%5E%7B%20-%206%7D%20%20%5Ctimes%206.02%20%5Ctimes%20%20%7B10%7D%5E%7B23%7D%20%20%5C%5C%20%20%3D%202.1425%20%5Ctimes%20%20%7B10%7D%5E%7B18%7D%20)
</h3>
We have the final answer as
<h3>
![N = 2.143 \times {10}^{18} \: \: atoms](https://tex.z-dn.net/?f=N%20%20%3D%202.143%20%5Ctimes%20%20%7B10%7D%5E%7B18%7D%20%20%5C%3A%20%20%5C%3A%20atoms)
</h3>
Hope this helps you
The percent yield is given by the actual and the theoretical yield. The percent yield of the 2.73 gm compound is 80.3%. Thus, option b is correct.
<h3>What is the percent yield?</h3>
The percent yield is the ratio of the actual yield to the theoretical yield. It is calculated as:
% Yield = Actual yield ÷ Theoretical yield × 100%
= 2.73 ÷ 3.84 × 100%
= 71.09 %
As the closest number to 71.09 is 80.3% the percent yield will be 80.3%.
There is no limiting reagent in the reaction between the copper iodide and mercury iodide as the moles of the reactants and the products are in equal quantity.
Hence, option b. there is no limiting reagent in this reaction.
Learn more about percent yield here:
brainly.com/question/17042787
#SPJ1
The distance covered will be:
![d = v_0\cdot t + \frac{1}{2}a\cdot t^2 = 20\frac{m}{s}\cdot 5\ s + \frac{5}{2}\frac{m}{s^2}\cdot 5^2\ s^2 = \bf 162,5\ m](https://tex.z-dn.net/?f=d%20%3D%20v_0%5Ccdot%20t%20%2B%20%5Cfrac%7B1%7D%7B2%7Da%5Ccdot%20t%5E2%20%3D%2020%5Cfrac%7Bm%7D%7Bs%7D%5Ccdot%205%5C%20s%20%2B%20%5Cfrac%7B5%7D%7B2%7D%5Cfrac%7Bm%7D%7Bs%5E2%7D%5Ccdot%205%5E2%5C%20s%5E2%20%3D%20%5Cbf%20162%2C5%5C%20m)
The correct answer is
D).
Answer:
Industrial activity increases the emission of greenhouse gases in the atmosphere, especially carbon dioxide (CO2), and it negatively affects climate by increasing global warming.
Two actions to face the global warming:
1- To substitute the use of fossil fuels by alternative clean energy sources such as, for example, hydroelectric, geothermal, solar and wind energy resources.
2- The government's policies decided to develop electric cars and to stimulate healthy habits such as walking instead of the use of conventional fossil-fueled transport modes.
Explanation:
Element Atomic number Electronic configuration Hydrogen 1 1 Helium 2 2 Lithium 3 2,1 Beryllium 4 2,2 Boron 5 2,3 Carbon 6 2,4 Nitrogen 7 2,5 Oxygen 8 2,6 Fluorine 9 2,7 Neon 10 2,8
The elements of these groups are called representative elements.