The diagrams show life cycles of two organisms that live near a freshwater ecosystem. Mosquito Life Cycle
Frog Life Cycle
Adult
Adult
Froglet
Eggs
Adult
emerges
Eggs
WHE
(laid on water)
(laid on water)
Developing
tadpole
Tadpoles
Pupa
Larva
Which environmental change will most likely have a negative effect on reproduction in both organisms?
A: several years of drought. B: A winter with higher then normal temperatures. C: An increase in summer storms D: several years with above-average precipitation

answer: you could do some invislibe ink.

explanation: i will tell you how to if u answer my question.

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."