<span>We breathe around an average of 500 ml of air in 1 normal (or relax) breathing. The lungs already have around 3 litres of reserve breathing. Since there is around 21% oxygen in air, we breathe in around 105 ml of Oxygen from the air. That is equal to around 0.14 g of Oxygen.</span>
Answer:
n=5
Explanation:
Applying the Rydberg's equation
hc/l= RH[(1/nf^2)-(1/ni^2)
Let l= wavelength= 3745×10^-9m
h=6.63×10^-34 , c= 3.0×10^8, RH= 2.179×10^-18
Substitute into the Rydberg's equation and simplify
(6.63×10^-34×3×10^8)/3745×10^-9=2.179×10^-18(1/nf^2 -1/8^2)
0.024= 1/nf^2 -0.0156
0.024+0.0156= 1/nf^2
0.0396= 1/nf^2
nf^2= 25.3
Take square root of both sides
nf= 5.02=5
The reaction is low b/c of the tempature. that's why.
Answer:
4CHO + 3O2 → 4CO2 + 2H2O
Explanation:
4CHO + 3O2 → 4CO2 + 2H2O
Not sure how to explain but I hope this helps :)
Answer: Activation energy = 10 kJ
enthalpy change = -25 kJ
Explanation:
Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and for the reaction comes out to be negative.
Given : Potential energy of the reactants = 30 kJ
Potential energy of the products = 5 kJ
Maximum energy of the system = 40 kJ.
Activation energy is the extra energy that must be supplied to reactants in order to cross the energy barrier and thus convert to products.
Activation energy = Maximum energy of the system - Potential energy of the reactants = (40-30) kJ =10 kJ
Enthalpy change = Potential energy of the products - Potential energy of the reactants =(5-30) kJ= -25 kJ