Answer:
each of two or more forms of the same element that contain equal numbers of protons but different number of nurtrons
in there nucleir
Explanation:
.....
Acetate and hydrogen gas (H2) is never abundant in aerobic soils and sediments because they are tiny, highly reduced molecules that many bacteria that breathe oxygen and nitrates quickly absorb to use as fuel for energy generation.
<h3>Why are acetate and hydrogen gas not abundant in aerobic soils and sediments?</h3>
Hydrogen is a substrate for methanogenic archaea and, along with acetate, one of the most significant intermediates in the methanogenic breakdown of organic materials. Numerous methanogenic environments exhibit contributions of H₂ to CH₄ production that are both significantly lower and significantly higher than is considered usual. H₂ is rapidly converted in methanogenic settings due to the simultaneous generation by fermenting and syntrophic bacteria and consumption by methanogenic archaea.
Learn more about archaea here:
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<u>Answer:</u> The atoms of every element on both the sides of the reaction must be same.
<u>Explanation:</u>
We are given a chemical equation and we need to balance it. Every equation follows Law of Conservation of mass.
This law states that in a chemical reaction, the number of atoms of each element must be same on both the sides of the equation.
For the given chemical equation:
On reactant side:
Number of zinc atoms = 1
Number of hydrogen atoms = 1
Number of chlorine atoms = 1
On product side:
Number of zinc atoms = 1
Number of hydrogen atoms = 2
Number of chlorine atoms = 2
As, the number of hydrogen and chlorine atoms on reactant and product side is not same, so we need to add a stoichiometric coefficient in-front of HCl on the reactant side. The balanced chemical equation becomes:
Answer:
The nitrogen cycle is a cycle by which the nitrogen is converted into forms which are utilized by the living organisms and these forms circulates among the atmosphere, biosphere, and marine ecosystem. The conversion of nitrogen is through biological and physical processes.
Nitrogen Fixation is the first step in nitrogen cycle. It involves the conversion of atmospheric nitrogen into ammonia. This is done by bacteria like Azotobacter and Rhizobium.
Assimilation involves the absorption of ammonia by the plants from the soil.
Ammonification is the process by which the dead organic remains of plants and animals are decomposed by the soil bacteria to produce ammonia.
Nitrification is the process in which the ammonia is converted into nitrates by the soil bacteria Nitrosomonas and Nitrococcus. The nitrates are again converted into nitrites by the bacteria Nitrobacter.
On the basis of above description, the following is the match of steps of the nitrogen cycle.
A. Nitrification - bacteria convert nitrates into nitrogen gas.
D. Assimilation - plants and animals take in and use nitrogen compounds.
E. Denitrification - bacteria break down waste products and return nitrogen to the soil.
B. Nitrogen fixation - bacteria convert atmospheric nitrogen to ammonia.
C. Ammonification - bacteria convert ammonia to nitrites and nitrates
