I believe the answer is sickle cell anemia. I hope this helps!
Answer:
a mixture is a material made up of two or more different substances which are physically combined.
Answer:
55.5g of N₂
Explanation:
It is possible to find ΔH of a reaction by the sum of half-reaction (Hess's law), thus:
<em>(1) </em>4 NH₃ + 3 O₂ → 2 N₂ + 6 H₂O ΔH= -1556KJ
<em>(2) </em>N₂O + H₂ → N₂ + H₂O ΔH= -389.4 KJ
<em>(3) </em>H₂+ ½ O₂ → H₂O ΔH= -223.9 KJ
(4) = 1/2 (1) + 3 (2):
<em>(4) </em>2 NH₃ + 3 N₂O +3 H₂ + ³/₂ O₂ → 4 N₂ + 6 H₂O
ΔH = 1/2 (-1556kJ) + 3 (-389.4kJ) = -1946.2kJ
(4) - 3(3):
2 NH₃ + 3 N₂O → 4 N₂ + 3 H₂O ΔH = -1946.2kJ - 3 (-223.9 KJ)
ΔH = -1274.5 kJ
As when 5 moles of nitrogen are produced there are released 1274.5kJ, when are released 505kJ:
505kJ × (5 moles N₂ / 1274.5kJ) =<em> 1.98 moles of N₂. </em>In mass:
1.98moles N₂ ₓ (28g / 1mol) = <em>55.5g of N₂</em>
The pressure of He gas, P = 0.95 atm
Temperature, T = 303 K
Gas constant, R = 0.0821 L.atm.K⁻¹mol⁻¹
Number of moles of He gas, n = 0.103 mol
According to an ideal gas equation, PV = nRT
V = nRT/P
= (0.103 mol) (0.0821 L.atm.K⁻¹mol⁻¹) (303 K) / 0.95 atm
= 2.7 L
Thus, the volume of the He gas is 2.7 L.
b is your best bet hope this helps
