Answer:
<h2>70.60 moles</h2>
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
We have the final answer as
<h3>70.60 moles</h3>
Hope this helps you
Answer:
0.027×10²³ atoms of H
Explanation:
Given data:
Mass of phosphoric acid = 0.1488 g
Number of hydrogen atoms = ?
Solution:
First of all we will calculate the number of moles of H₃PO₄.
Number of moles = mass/molar mass
Number of moles = 0.1488 g/ 98 g/mol
Number of moles = 0.0015 mol
1 mole of H₃PO₄ contain = 3 mol of H
0.0015 mol× 3= 0.0045 mol
Now we will calculate the number H atoms.
1 mole = 6.022×10²³ atoms
0.0045 mol×6.022×10²³ atoms / 1 mol
0.027×10²³ atoms of H
The correct option is C.
The issue of disposal of waste of nuclear power plants has been a controversial issue for long because of the hazardous effects which these wastes have on human health and the environment. Most of the waste are usually long lived radioactive wastes which can remain active for a very long time and which have detrimental effect on both the environment and the human health.<span />
Answer:
cần 162,5
Explanation:
100gKNO3 cần 1 mol kno3 từ đó suy ra cần 0,5 mol hg(no3)2 suy ra cần 162,5g hg(no3)2
The correct answer is option C, that is, carbon monoxide.
A combustion reaction takes place when a component reacts with oxygen and produces a huge amount of energy in the form of heat and light. A combustion reaction always exhibits oxygen as one reactant. The second reactant is always a hydrocarbon, that is, a compound formed of hydrogen and carbon. A combustion reaction always generates water and carbon dioxide.