There is a shortcut trick while doing such fill in the blanks of nuclear reactions of hydrogen and helium
Let a,b,care elements of set N
Now
for our question
Hence b=4-3+1=1+1=2
So
The missing place should b e deuterium of heavy water
In nuclear reactions energy is released so it's mentioned on product side not reactant side
Answer:
68133080.02 g
Explanation:
I believe that the question is to find the mass of air in the room and not the molar mass of air since the molar mass of air was already given in the question as 28.97 g/mol.
Now, if 1 mole of a gas occupies 22.4 L
x moles of air occupies 52,681,428.8 Liters
x = 1 * 52,681,428.8 /22.4
x = 2351849.5 moles of air
Now, number of moles = mass/ molar mass
but molar mass = 28.97 g/mol
2351849.5 = mass/28.97
mass = 2351849.5 * 28.97
mass = 68133080.02 g
Answer:
im getting 331.23
Explanation:
Element Number Mass Percet Composition
O 6 16.00 28.9828819853274
N 2 14.01 8.45937867946744
Pb 1 207.21 62.5577393352051
The element of Sodium in the periodic table has a large atomic radius than magnesium due to less atomic attraction on the last electron.
<h3 /><h3>What is the atomic radius?</h3>
The atomic radii are given as the distance between the last electron in the shell to the center of the nucleus.
In the periodic table, on moving from the left to right there has been a decrease in the atomic radius of the atom with the addition of an electron in the same shell forming an increase in the nuclear attraction faced by the last electron.
Thus, Sodium has a large atomic radius than magnesium due to the presence of a less nuclear attraction over the last electron.
Learn more about atomic radii, here:
brainly.com/question/14086621
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