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3 years ago

.................. are microorganism used to improve soil fertility.plz ams it correct

Chemistry

2 answers:

slavikrds [6]3 years ago

5 0

Answer:

Some bacteria like rhizobium and blue green algae are able to fix nitrogen gas from the atmosphere to enrich the soil with nitrogen compounds and increase its fertility. The nitrogen-fixing bacteria and blue green algae are called biological nitrogen fixers.

tatiyna3 years ago

5 0

Answer:

Diazotrophic bacteria or Cyanobacteria

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Which ion La3+ or Lu3+ will form the more stable complex with EDTA4-

shepuryov [24]

I don’t really know but I’ll get someone to help u

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3 years ago

True or false. Large covalent molecules with the same molecular formula or more likely to have identical angles between orbitals

Alexeev081 [22]

True, because the large covalent molecules would combine with the others

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4 years ago

The indicator propyl red has a Ka of 3.3 X 10-6 . It is red at low pH and yellow at higher pH. What is the approximate pH range

Alik [6]

Answer:

4.48 - 6.48

Explanation:

A pH indicator works in a better way in a range of pH = pKa ± 1. That means we need to determine the pKa of the indicator propyl red to find the range over which it change its color. That is:

pKa = -log Ka

pKa = -log 3.3x10⁻⁶

pKa = 5.48

That means the range over propyl red will change from yellow to red or vice versa is:

4.48 - 6.48

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3 years ago

which of the following compounds will likely have a bent triatomic structure? A. H2S. B. O2 C.NI3 D.CH4

Ymorist [56]

a) H2S is your answer.

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3 years ago

4Fe (s) + 3 O2 (g) → 2 Fe2O3 (s)

Novay_Z [31]

Explanation:

The number acquired by an element after the lose or gain of an electron is called oxidation number.

For example, $4Fe(s) + 3O_{2}(g) \rightarrow 2Fe_{2}O_{3}(s)$

Here, oxidation number of Fe(s) is 0 and Fe in $Fe_{2}O_{3}$ is +3.

Oxidation number of O in $O_{2}(g)$ is 0 as it is present in its elemental state.

The oxidation number of O in $Fe_{2}O_{3}$ is calculated as follows.

$2(3) + 3x = 0\\6 + 3x = 0\\x = \frac{-6}{3}\\= -2$

Hence, oxidation number of O in $Fe_{2}O_{3}$ is -2.

The loss of electrons by an element or substance is called oxidation. Here, electrons are being lost by Fe(s) as an increase in oxidation state is occurring. So, Fe(s) is oxidized.

The gain of electrons by an element or substance is called reduction. Here, electrons are being added to $O_{2}$ as a decrease in its oxidation state is occurring. So, $O_{2}$ is reduced.

An element or compound which is being reduced is called oxidizing agent. Here, $O_{2}$ is the oxidizing agent.

An element or compound which is being oxidized is called reducing agent. Here, Fe(s) is the reducing agent.

5 0

3 years ago

.................. are microorganism used to improve soil fertility.plz ams it correct​

.................. are microorganism used to improve soil fertility.plz ams it correct