Choose A, Kr is noble gas
Answer:
B. 0.16 M H₂SO₄.
Explanation:
- The rate of the reaction depends directly on the concentration of the reactants.
Rate ∝ [Reactants].
So, the reaction occurs fastest in the highest concentration of H₂SO₄.
<em>So, the answer is: B. 0.16 M H₂SO₄.</em>
<em></em>
Delta Hf = dHf
<span>dHf rxn = (n*dHf products) - (n*dHf reactants). </span>
<span>Substitute 5113.3 kJ for dHf rxn and solve for the only unknown in the equation which is dHf C8H18.
</span>-5133.3-[(8x-393.5)+9(-241.8)] = 190.9
<span>Since it is an enthalpy of formation, the value has to be negative, </span>
<span>thus the correct answer is -190.9</span>
The density of PETE is 1.38 g/cm3.
