It's the colour of the light
Element No. of protons Neutrons Electrons
Sulfur 16 16 16
Cobalt 27 33 27
Uranium 92 146 92
Lead 82 125 82
Explanation:
The subatomic particles comprises of electrons, protons and neutrons in any element. Each atom has its own unique atomic number and mass number. As atomic number of any element or atom is equal to the number of electrons in that atom. And a stable atom will have equal number of electrons and protons. So the atomic number will be equal to the number of protons and electrons. Then the neutron number can be obtained from mass number. As mass number is the addition of number of protons and neutrons in the nucleus, the number of neutrons can be obtained by subtracting the number of protons from mass number
So sulfur has an atomic number of 16 and mass number of 32, that means the number of electrons in sulfur is 16, the number of protons in sulfur is also 16 and the number of neutrons in sulfur is 32-16 = 16.
Similarly, Cobalt has an atomic number of 27 and mass number of 60, so the number of protons and electrons is 27, the number of neutrons is 60-27 = 33.
Also, Uranium has an atomic number of 92 and mass number of 238. So the subatomic particles in uranium is 92,92 and 146.
And the atomic number of lead is 82 and mass number is 207, then the subatomic particles in lead is 82,82 and 125.
The balanced equation for formation of NH₃ is as follows;
N₂ + 3H₂ --> 2NH₃
Stoichiometry of N₂ to H₂ is 1:3
when gases react, stoichiometry of reactants applies to volumes as well.
Because 1 mol of any substance occupies 22.4 L at STP.
Therefore stoichiometry of volumes of N₂ to H₂ is 1:3
If N₂ is the limiting reactant,
1 L of N₂ reacts with 3 L of H₂
Therefore 20 L of N₂ should react with - 3/1 x 20 = 60 L
Only 25 L of H₂ is present therefore H₂ is the limiting reactant
ratio of H₂ to NH₃ is 3:2
if 3 L of H₂ forms - 2 L of NH₃
then 25 L of H₂ forms - 2/3 x 25 L = 16.67 L of ammonia
if 22.4 L of NH₃ contains 1 mol of NH₃
then 16.67 L of NH₃ consists of - 1/22.4 x 16.67 =0.74 mol oh NH₃
1 mol of NH₃ is made of 6.022 x 10²³ NH₃ molecules
Therefore 0.74 mol of NH₃ made of 6.022 x 10²³ molecules/mol x 0.74 mol
number of NH₃ molecules formed - 4.45 x 10²³ molecules of NH₃
N₂ is in excess
25 L of H₂ reacts with - 25/3 = 8.33 L
however 20 L present initially
Excess reactant left - 20 - 8.33 = 11.67 L of N₂ remaining
The nucleus is a membrane-bound organelle that contains an organism's genetic material and helps control and regulate cellular process.
The answer is nucleus(c)
Hope this helps!