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3 years ago

Uniformitarianism states that the geologic processes occurring in the past are the same processes that are occurring today.

Chemistry

2 answers:

nignag [31]3 years ago

7 0

Answer: B

Explanation: USA test prep, K12

ratelena [41]3 years ago

5 0

Answer:

B) Because modern corals live in warm, shallow seas, we can infer the same

environment existed during the Devonian period, where the Kimberleys are

today

Explanation:

Based on the law of Uniformitarianism we can infer the environment that existed during the formation of the Devonian limestone and the Barrier Reef today.

Since the process that occurs in times past are still occurring today, the depositional environment must have been the same.
The limestone in Kimberly suggests that they must have formed under warm, shallow sea very similar to that of the Barrier reef today.
This interpretation is only made possible by the law of uniformitarianism.

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Consider the reaction when aqueous solutions of potassium hydroxide and ammonium nitrate are combined. The net ionic equation fo

Reil [10]

Answer: $OH^-(aq)+NH_4^+(aq)\rightarrow NH_3(g)+H_2O(l)$

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.

$KOH(aq)+NH_4NO_3(aq)\rightarrow KNO_3(aq)+NH_3(g)+H_2O(l)$

The equation can be written in terms of ions as:

$K^+(aq)+OH^-(aq)+NH_4^+(aq)+NO_3^-(aq)\rightarrow K^+(aq)+NO_3^-(aq)+NH_3(g)+H_2O(l)$

Spectator ions are defined as the ions which does not get involved in a chemical equation or they are ions which are found on both the sides of the chemical reaction present in ionic form.

The ions which are present on both the sides of the equation are potassium and nitrate ions and hence are not involved in net ionic equation.

Hence, the net ionic equation is :

$OH^-(aq)+NH_4^+(aq)\rightarrow NH_3(g)+H_2O(l)$

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