Answer is: (4) proton and neutron.
One unified atomic mass unit is approximately the mass of one nucleon (proton or neutron).
The unified atomic mass unit (amu) is a standard unit of atom mass.
One unified atomic mass unit is approximately the mass of one nucleon (1.66·10⁻²⁷ kg).
For example, one carbon atom has mass of 12 amu (unified atomic mass).
The electron has a mass that is approximately 1/1836 that of the proton.
Answer:
El plástico que flota en el mar libera compuestos orgánicos que estimulan el crecimiento de las bacterias marinas. Científicos del CSIC revelan que estos residuos liberan hasta 23.600 toneladas métricas de carbono orgánico disuelto en el agua, que en su mayor parte es rápidamente consumido por las bacterias.
Answer:
10%
Explanation:
Given data:
Actual yield = 0.13 moles
Percent yield = ?
Solution:
Balanced chemical equation.
3H₂ + N₂ → 2NH₃
First of all we will calculate the mass of given moles of ammonia.
Number of moles = mass / molar mass
Mass = 0.13 × 17 g/mol
Mass = 2.21 g
2.21 g is experimental yield of ammonia.
Hydrogen is limiting reactant because only two moles of hydrogen present.
we will compare the moles of hydrogen and ammonia from balance chemical equation.
H₂ : NH₃
3 : 2
2 : 2/3×2 = 1.33 moles
Mass of ammonia
Mass = number of moles × molar mass
Mass = 1.33 mol × 17 g/mol
Mass = 22.61 g
Percent yield:
Percent yield = actual yield / theoretical yield × 100
Percent yield = 2.21 g / 22.61 g
Percent yield =9.8% which is almost 10%
Answer:
Mass = 30 g
Explanation:
Given data:
Mass of hydrogen needed = ?
Number of moles of ammonia produced = 10 mol
Solution:
Chemical equation:
N₂ + 3H₂ → 2NH₃
Now we will compare the moles of ammonia and hydrogen.
NH₃ : H₂
2 : 3
10 : 3/2×10 = 15 mol
Mass of hydrogen needed:
Mass = number of moles × molar mass
Mass = 15 mol × 2 g/mol
Mass = 30 g
The answer is c) Electrical energy
