Answer:
Some lichen symbionts can survive independently on bare rocks in the absence of any external source of organic matter due to the ability of the phototrophic partner to fix CO2 from the air, and <u>nitrogen fixation by the cyanobacterial partner.</u>
Explanation:
Lichen are organisms formed from the symbiotic association of a fungus with an organism capable of photosynthesis, be it an algae, a cyanobacterium, or both.
The fungus depends entirely on the photosynthetic organism in its metabolism of carbohydrates, receiving sugars or saccharine alcohols from it. For its part, the algae depends, for its metabolism, on the water and the mineral substances that the fungus provides it, at the same time that it is also protected by it from too high light intensities.
Answer:
C₃H₈₍g₎ + 5O₂₍g₎→ 3CO₂₍g₎ + 4H₂O₍l₎
Explanation:
Propane is an alkane that burns in enough oxygen to produce carbon (iv) Oxide and heat as the only by products. Balancing the equation: The number of atoms of each kind on either side should be equal. Hydrogen on the left has eight atoms same as the right side after balancing, oxygen has 10 while carbon has 3 on each side.
I think it's just water right..?
I = average intensity of sunlight reaching at Madison = 2000 Js⁻¹m⁻²
A = area on which the light strike = 4.80 cm² = 4.80 x 10⁻⁴ m²
energy received per second by the area is given as
E = IA
inserting the values
E = (2000) (4.80 x 10⁻⁴)
E = 0.96 J
λ = wavelength of the photons in the sunlight = 510 x 10⁻⁹ m
c = speed of light = 3 x 10⁸ m/s
h = plank's constant = 6.63 x 10⁻³⁴ J-s
n = number of photons received per second
energy received per second is also given as
E = n h c /λ
inserting the values
0.96 = n (6.63 x 10⁻³⁴) (3 x 10⁸) /(510 x 10⁻⁹)
n = 2.5 x 10¹⁸ per second
Since the water is gaining heat from its surroundings, the reaction is endothermic
