Chemistry, 16.01.2020 02:31 pharadorvil04
1. which statement concerning an ecosystem is correct?
(1) it can exist with or without a constant source of energy
input.
(2) it must contain consumers but can exist without
producers
(3) it involves interactions between biotic and abiotic
factors.
(4) it can exist on land, but it cannot exist in lakes, rivers,
or oceans.
Answers: 3
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Match the acid base pairs by arranging the acid name with the conjugate base formula. hydrogen carbonate hydrogen phosphate carbonic acid read water sulfuric acid phosphoric acid a. co32- b. hso4- c. hco3- d. po43- e. h2po4- f. oh-
Answers: 1
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Based on the equation and the information in the table, what is the enthalpy of the reaction?
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Na chemical reaction, activation energy increases the of the reactants. this outcome causes the particles to collide, which results in the of new products.
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Achemist who studies water samples did a demonstration of how to test for lead in water. she added a clear solution of potassium iodide to a clear solution of lead nitrate. then a yellow swirling solid formed in the liquid. what is most likely true about the yellow solid?
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1. which statement concerning an ecosystem is correct?
(1) it can exist with or without a con...
(1) it can exist with or without a con...
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