The empirical formula is No2 and molecular formula is N2O4
find the moles of each reactant
=% composition/molar mass
molar mass of oxygen=16 g/mol ,while hat of nitrogen= 14 g/mol from periodic table
moles is therefore=
nitrogen= 30.43/14=2.174 moles
oxygen= 69.57/1 6=4.348 moles
find the mole ratio by dividing each moles with smallest number of mole( 2.174)
nitrogen = 2.174/2.174= 1
oxygen = 4.348/2.174=2
therefore the empirical formula= NO2
molecular formula calculation
[NO2] n= 92.02 amu
[(14) + (16x2)]n = 92.02 amu
46n= 92.02
divide both side by 46
n=2
therefore the molecular formula is gotten by multiplying the empirical formula by 2= [NO2]2= N2O4
Hello there!
Hydrogen has one proton because the number of protons in an atom is equal to the atomic number of the element. S ince hydrogen's atomic number is 1, it has one proton.
I hope that's help !
Answer:1
Explanation:
hydrogen only has 1
Elements on the periodic table are arranged into groups and periods, and are ordered according to atomic number, not the number of proteins or based solely on reactivity. Each element's place is determined by the number of protons in its nucleus, which also typically equals the number of electrons. Elements in the same group, or column, share similar chemical properties.
The elements on the periodic table are indeed arranged into groups and periods, but they are ordered in line with their atomic number. This atomic number reflects the number of protons in an element's nucleus and also typically matches the number of electrons surrounding the nucleus. Elements in the same vertical column, known as a group, share similar chemical properties.
Each box on the periodic table represents an element, and contains its atomic number, symbol, average atomic mass and (sometimes) name. The elements are arranged in seven horizontal rows, known as periods or series, and 18 vertical columns, called groups. The properties of the elements are periodic functions of their atomic numbers, hence the arrangements.
The reactivity of elements does have a role to play in the periodic table, as element groups possess similar chemical behaviors due to the similar configurations of their outermost electron shell. However, this reactivity does not determine the ordering of elements on the periodic table as the atomic number does. The numbering of proteins error seems to be a typographical mistake as proteins aren't a determinant in the configuration of the periodic table.
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Which intervals are affected by the addition of a
catalyst?
(1) 1 and 2
(2) 1 and 3
(3) 2 and 4
(4) 3 and 4
Intervals 1 and 3 are most affected by the addition of catalyst. Option 2 is correct.
Catalysts are those compounds that reduce the activation energy for the reaction to occur, hence increasing the rate of reaction.
Activation energy is the energy that is required to start a reaction. Here, 1 represents the activation energy and 3 represents activation energy without catalyst.
Therefore, intervals 1 and 3 are most affected by the addition of catalyst.
Learn more about Catalyst:
Answer: Option (2) is the correct answer.
Explanation:
The minimum amount of energy required by the reactants to undergo a reaction is known as activation energy.
And when we add a catalyst into a reaction then it leads to a decrease in activation energy. As a result, product formation becomes faster.
Therefore, we can conclude that intervals 1 and 3 are affected by the addition of a catalyst.
The mass number of an atom with 92 protons and 108 neutrons is 200.
To calculate the mass number of an atom that has 92 protons and 108 neutrons, you simply add these two numbers together. The mass number of an atom is comprised of the total number of protons and neutrons in its nucleus. So, 92 protons + 108 neutrons = 200. Therefore, the mass number of the atom is 200.
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