Answer:
34.23 kJ/mol
Explanation:
So in this problem, we want to find out how much lower the activation energy is when an enzyme is present.
For same concentration level the reaction rate is determined by the rate factor, which is given by Arrhenius equation:
rate factor without catalyst:
k₁= A·e^{ - Ea₁ / (R·T) }
rate factor with catalyst:
k₂= A·e^{ - Ea₂ / (R·T) }
The ratio of the rate factors at same temperature is:
( k₂/k₁) = e^{ - Ea₂ / (R·T) } / e^{ - Ea₁ / (R·T) }
<=>
( k₂/k₁) = e^{ (Ea₁- Ea₂) / (R·T) }
But if we take the natural log of both sides and rearrange, we end up with Ea1 - Ea2. That's how much lower the activation energy will be.
Ea₁- Ea₂ = R·T·ln( k₂/k₁)
= 8.314472J/molk · 298K · ln(10^6)
= 34.23 kJ/mol
Answer:
A .a net force greater than zero
B. Unbalanced Force
Explanation:
A .When the resultant force on an object is zero, it will remain at rest if it is at rest, or continue to move in a straight line at a constant velocity if it is in motion. So , the answer will be a net force greater than zero .
B . An unbalanced force (net force) acting on an object changes its speed and/or direction of motion. An unbalanced force is an unopposed force that causes a change in motion. A net force = unbalanced force. So , the answer will be unbalanced forces .
Answer:
The pulmonary circulation is part of the circulation system that moves blood from the heart to the lungs and lungs to the heart.
Explanation:
The pulmonary circulation is the part of the circulatory system which carries deoxygenated blood away from the right ventricle, to the lungs, and returns oxygenated blood to the left atrium and ventricle of the heart.
The deoxygenated blood is carried out by the right ventricle to the lungs and then moves the blood that carries the oxygen from the lungs to the left atrium and ventricle of the heart. It is a closed part of the circulation.