2. Sharks are the top predator in a marine ecosystem. Sharks help to
maintain a balance in the population of smaller organisms. If the shark's
population were to decrease, the smaller organisms would increase greatly,
interrupting the food web. Which of the following relationships is MOST
similar to the relationship between the shark and the marine ecosystem?
O A frog eats flies and lizards in a swamp ecosystem
Leaf-cutter ants eat grass in a prairie ecosystem
A wolf eats small mammals in a forest ecosystem
O A lizard eats a cricket in a desert ecosystem
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Ответ:
Given:
1.0 mol of CaO
Required:
grams of water
Solution:
CaO + H2O → Ca(OH)2
Molar mass of H2O = 18.02g H2O
1mol CaO(1 mol H2O/1 mol CaO)(18.02g H2O/1 mol H2O) = 0.055g H2O