Answer:
For ²⁰⁸Pb²⁺ cation, the sum of the number of neutrons and electrons = 206
Explanation:
Lead, chemical symbol Pb, is a chemical element which belongs to the group 14 of the periodic table. The atomic number of lead is 82 and it is a member of the p-block.
The isotope of lead with the mass number 208, has 126 neutrons.
Since, atomic number = number of protons = number of electrons for neutral atom
Therefore, for ²⁰⁸Pb: number of electrons= 82
So, <u>for ²⁰⁸Pb²⁺ cation: number of electrons</u>= 82 - 2 = 80
<u>Therefore, for ²⁰⁸Pb²⁺ cation, the sum of the number of neutrons and electrons = number of electrons + number of neutrons = 80 electrons + 126 neutrons = 206.</u>
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Answer:
Mass = 2.64 g
Explanation:
Given data;
Mass of butane = 3.60 g
Mass of oxygen = 2.30 g
Mass of carbon dioxide produced = ?
Solution:
Chemical equation:
O₂ + C₄H₁₀ → CO₂ + H₂O
Number of moles of BUTANE:
Number of moles = mass/ molar mass
Number of moles = 3.60 g / 58.12 g/mol
Number of moles = 0.06 mol
Number of moles of oxygen:
Number of moles = mass/ molar mass
Number of moles = 2.30 g / 32 g/mol
Number of moles = 0.07 mol
Now we compare the moles ammonia with hydrogen and nitrogen
O₂ : CO₂
1 : 1
0.07 : 0.07 mol
C₄H₁₀ : CO₂
1 : 1
0.06 : 0.06 mol
The number of moles of carbondioxide produced by butane are less so it will limiting reactant.
Theoretical yield:
Mass = number of moles × molar mass
Mass =0.06 mol × 44 g/mol
Mass = 2.64 g
7 ..... i think because in CH3 there would be 3 H atoms while in 2CH2 there would be four
Answer:
0.535 = 55.04816695 grams
Explanation:
0.009718761398284852 moles = 1 gram