Mass of Nd₂(SO₄)₃ : 2.653 g
<h3>Further explanation</h3>
Reaction
Nd₂Fe₁₄B + 17H₂SO₄ → Nd₂(SO₄)₃ + 14FeSO₄ + B + 17H₂
5 g Nd₂Fe₁₄B
MW = 2. 144,242 + 14. 55.845 + 10.811
MW = 288.484 + 781.83+10.811=1081.125 g/mol
mol :
mol Nd₂Fe₁₄B = mol Nd₂(SO₄)₃=0.0046
so mass of Nd₂(SO₄)₃ :
MW Nd₂(SO₄)₃ = 2.144.242+3.32,065+12.15,999
MW = 288.484+96.195+191.988=576.667 g/mol
Answer: FALSE
Explanation: Magnesium is more reactive.
Hope this helps!
it will increase sea level due to runoff from the melting ice hope this helped!!
According to
Graham's Law of Diffusion,"the rates of diffusion of two gases are inversely proportional to the square root of their Molar masses or Densities at the same pressure and temperature".
r₁ / r₂ =
Where,
r₁ = Rate of Helium
r₂ = Rate of Oxygen
M₂ = Molar mass of Oxygen = 32 g/mol
M₁ = Molar mass of Fluorine = 4 g/mol
Putting values,
r₁ / r₂ =
r₁ / r₂ =
r₁ / r₂ =
2.82
Result:
Helium gas effuses
2.82 times faster than Oxygen gas.
Answer:
They would all have the same volume.
Explanation:
Let us consider the same temperature and pressure of both Ar and CO₂ is standard temperature and pressure.
Standard temperature = 273.15 K
Standard pressure = 1 atm
Number of moles of CO₂ = 0.498 mol
Volume of CO₂ = ?
Solution:
PV = nRT
R = general gas constant = 0.0821 atm.L /mol.K
1 atm × V = 0.498 mol × 0.0821 atm.L /mol.K × 273.15 K
1 atm × V = 11.17 atm.L
V = 11.17 atm.L/1 atm
V = 11.17 L
Volume calculation for Ar:
Number of moles of Ar:
Number of moles = mass/molar mass
Number of moles = 19.91 g /39.95 g/mol
Number of moles = 0.498 mol
Number of moles are same thus it will occupy same volume. We can prove it through calculation given below,
PV = nRT
R = general gas constant = 0.0821 atm.L /mol.K
1 atm × V = 0.498 mol × 0.0821 atm.L /mol.K × 273.15 K
1 atm × V = 11.17 atm.L
V = 11.17 atm.L/1 atm
V = 11.17 L