The only answer we can choose
<span>B.
energy needed to break chemical bonds.</span>
Answer:
The net charge on the ion is negative 1(-1)
Explanation:
Negative 1(-1)
answer:
in plants
Transport manufactured food from the leaves to others parts of the plant
Facilitates gaseous exchange through the stomata in the leaves to other parts of the plant
in animal
Exchange of respiratory gases across respiratory services
Excretion of nitrogenous waste in some unicellular organisms
Explanation:
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HCl = H⁺ + Cl⁻
c(HCl)=9.8*10⁻⁵ mol/l
pH=-lg[H⁺]
[H⁺]=c(HCl)
pH=-lg{c(HCl)}
pH=-lg{9.8*10⁻⁵}=4.009
pH=4.009
Llowing certain substances to pass through it but not others, especially allowing the passage of a solvent but not of certain solutes.