Answer:
Q = 555200 J
Explanation:
∴ mass (m) = 80 kg
∴ c = 3470 J/Kg.K
∴ T1 = 37°C ≅ 310 K
∴ T2 = 39°C ≅ 312 K
⇒ ΔT = T2 - T1 = 312 K - 310 K = 2 K
⇒ Q = (80 Kg)*(3470 J/Kg.K)*(2 K)
⇒ Q = 555200 J ≅ 600000 J ≅ 6 E5 J
A metallic bond is a force that holds atoms together in a metallic substance.
Answer:
-105 kJ
Explanation:
The enthalpy change of a reaction is the sum of the energy of the bonds of the reactants and the products. The bonds at the reactants are being broken, so it's an endothermic reaction, so the bond energy must be positive.
The bonds at the products are being formed, so the process is exothermic, and the bond energy must be negative. There are being broken 1 N≡N bond and 3 H-H bonds, and are being formed 6 N-H bonds:
Reactants: 945 + 3*432 = 2241 kJ
Products: 6*(-391) = -2346 kJ
ΔH = 2241 - 2346
ΔH = -105 kJ
Answer:
Explanation:
A. 64 g O2(1 mole/32 g)(6.023x10^23molecules/mole)=12.04x10^23 =1.204x10^24
B. hydrogen 10 g/2 g/mol =(5 mol) 6.023 x 10^23
helium 10g/4g/mol=(2.5 mol)(6.023x10^23
C. 0.5molO2 x32 g/mol= 16g
D. (3.011 x10^23 atoms/6.023 x 10^23 atoms/mol)x (12g/mol)=6g
E. (58.5g/mol) x 10 mol= 585 g
moderate basic since the ph is almost strong basic