Respuesta :
Explanation:
(a) According to the mole concept, 1 mole of an atom contains [tex]6.022 \times 10^{23}[/tex] atoms.
Hence, number of atoms present in [tex]4.48 \times 10^{-23}[/tex] g will be as follows.
[tex]4.48 \times 10^{-23} \times 6.022 \times 10^{23}[/tex]
= 26.97 g
or, = 27 g
This means that 1 mole of aluminium atoms contain 27 g.
(b) Mass of air plane is 5000 kg of [tex]5000 \times 1000 g[/tex] (as 1 kg = 1000 g).
As mass of 1 mole aluminium is calculated as 27 g and mass of air plane is given as 5000000 g.
Therefore, calculate the number of moles of aluminium atoms as follws.
No. of moles of Al atoms = [tex]\frac{\text{mass of small air plane}}{\text{mass of 1 mol Aluminium}}[/tex]
= [tex]\frac{5000000g}{27 g}[/tex]
= 185185.18
So, the answer in three significant digits will be 185000 moles of aluminum atoms have a mass equal to the mass of a small airplane.
The study of chemicals and bonds is called chemistry. There are two types of elements and these are metals and nonmetals.
The correct answer is described below
What are moles?
- The mole is the base unit of the amount of substance in the International System of Units.
- It is defined as exactly 6.02214076×10²³ elementary entities, which may be atoms, molecules, ions, or electrons
According to the question, the answer of the first question is:-
The number of atoms will be:-
[tex]4.48*10^{-23}*6.022*10^{23}\\\\=26.97[/tex]
The correct answer is 27
The answer to the second question is as follows:-
The mass of the air is [tex]5000*1000g[/tex]. hence, As the mass of 1-mole aluminum is calculated as 27 g and mass of airplane is given as 5000000 g.
No moles will be
:- [tex]\frac{500000}{27} \\\\=185185.18[/tex]
Hence, the correct answer is mentioned above.
For more information about the moles, refer to the link:-
https://brainly.com/question/16759172
