What are two ways nitrogen fixation occurs

Answer:

Nitric acid is a strong acid meaning it completely dissociates in water. Therefore, you can say that the concentration of H+ ions in solution is the same as the concentration of the acid (molar concentration). So once you have that, you can use the pH formula to find the pH of the acid.

pH = -log[H+]

So if you have .15 M HNO3 the pH is 0.82.

But, if you have a different concentration, the pH will change.

Explanation:

Answer:

Kindly check the explanation section.

Explanation:

The chemical compound known as Borates has the Molecular Formula: BO3^-3. It has the shape of a triangle but Borates can form multiples ones that is to say quadrangles. Also, as a result of the fact that the octect is not complete, Borates are used as lewis Acid.

The oxygen present in Borates is/are directly attached to the central atom that is Boron while in non silicates the oxygen(s) that may be present is not directly attached to the central atom.

Answer:

Aluminium

Explanation:

From the question given above, the following data were obtained:

Diameter (d) = 1.25 cm

Height (h) = 6.48 cm

Volume (V) of cylindrical=.?

Mass (m) of cylindrical object = 21.535 g

Density of the cylindrical object =..?

Next, we shall determine the radius of the cylindrical object. This is illustrated below:

Diameter (d) = 1.25 cm

Radius (r) =?

r = d/2

r = 1.25/2

Radius (r) = 0.625 cm

Next, we shall determine the volume of the cylindrical object. This can be obtained as follow:

Height (h) = 6.48 cm

Radius (r) = 0.625 cm

Pi (π) = 3.14

Volume (V) of cylindrical=.?

V = πr²h

V = 3.14 × 0.625² × 6.48

V = 7.948 cm³

Recall:

1 cm³ = 1 mL

Therefore

7.948 cm³ = 7.948 mL

Thus, the volume of the cylindrical object is 7.948 mL

Finally, we shall determine the metal in which the cylindrical object is made up of by calculating the density of the cylindrical object. This can be obtained as follow:

Mass (m) of cylindrical object = 21.535 g

Volume of the cylindrical object = 7.948 mL

Density of cylindrical object =?

Density = mass /volume

Density = 21.535 / 7.948

Density of cylindrical object = 2.7 g/mL

Comparing the density of the cylindrical object (i.e 2.7 g/mL) with those given in the table in the question, the cylindrical object is made of aluminium since they have the same density.

Answer:

112.5

Explanation:

I think so because in one unit has 4 oxygen atoms.

Answer:

Explanation:

Finding Limiting reactant:

Convert all reactant data to moles, divide by respective coefficient => smaller value is the limiting reactant.

Given      2KCl      +     CaF₂ => 2KF + CaCl₂

            55.1mole      46.7mole

(55.1/2) = 27.55          (46.7/1) = 46.7

Limiting reactant is KCl b/c smaller value after dividing by respective coefficients. CaF₂ will be in excess when rxn consumes all KCl.

Moles KF = 55.1 mole as coefficients of two substances in balanced equation are equal.

Answer:

2

Explanation:

Answer:

B

Explanation:

The rock cycle is a series of processes that create and transform the types of rocks in Earth’s crust. A different type of rock is broken down or changes in some way. The correct option is B.

Sedimentary, igneous, and metamorphic rocks are the three main categories of rocks. Each of these rocks is the result of physical processes that are a part of the rock cycle, such as melting, cooling, eroding, compacting, or deforming.

Rock fragments from other types of existing rocks or organic material are used to create sedimentary rocks. Clastic, organic (biological), and chemical sedimentary rocks are the three different types of sedimentary rocks.

Rocks that have undergone extreme heat or pressure and changed from their initial state are known as metamorphic rocks. When molten, heated material cools and solidifies, igneous rocks are created (their name is derived from the Latin word for fire).

Thus the correct option is B.

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Answer:

Thermoplastics have low melting temperature because of the week van der Waals bonds between their Long Chain Molecules

Polymer chains once synthesized they will remain stable in the environment because of the strong covalent bonds in the Long Chain Molecules

Explanation:

Thermoplastics are polymers that are easily melted and changed to another shape as many times as possible. They become molten when they are heated and solidify when cooled. Examples of thermoplastics include; polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyamides, polyesters, and polyurethanes.

Polymers are organic materials that consists of a long chain of atoms held together by strong covalent bonds. Polymers constitute an important environmental concern because most polymers are non biodegradable and remain in the environment almost indefinitely.

Answer:

1.  Can help in development of effective medications

2.  Can help explain genetic diseases

3.  Composed of about 19,000 genes

Explanation:

The other answer options are misleading.

Genetic code of humans can help with understanding more than just human genetics.

Human genetics is composed of 23 chromosome pairs, for a total of 46 chromosomes.

Proteins are large biomolecules, or macromolecules, consisting of one or more long chains of amino acid residues. Hope this helps!

Answer:

Proteins are carbohydrates that come from nutritious food.

They are one of the four main carbohydrates.

This is a simple definition of the word proteins.

Hope this helps!

Answer:

I need to se the options

Answer:

it means a hamburger has less calories bc its referring to steak that has been grounded and the highlight would be calories

Answer:

Compact fluorescent lamps, or CFLs, use 75 percent less energy than a traditional incandescent bulb, but they never quite caught on for home use.Feb

Answer:

the independent variable is the beakers

Explanation:

Answer:

its Radiation

Explanation:

Because it transfers heat from a object to a less hot object in this case from a hot curling iron to your hair.

Answer:

143 N

Explanation:

Answer:

A

Explanation:

it is round up to 20

Answer:

20 is the answer (A)

Explanation:

Neon/Atomic mass

20.1797 u

this is approximately 20 so 20 is the answer (A)

hope this helps!

Answer:

D. 18

Explanation:

group 18 elements are called noble gases.

They have complete octet in their valance shell. Therefore, they are least likely to form bonds with other elements.

Answer:

Approximately [tex]1.04\; \rm L[/tex] of the [tex]12.0\; \rm M[/tex] [tex]\rm NaOH[/tex] solution is needed. Approximately another [tex]3.96\; \rm L[/tex] of water will also be required.

Assumption: the volume of these [tex]\rm NaOH[/tex] solutions does not depend on the quantity of [tex]\rm NaOH\![/tex] (the solute) that each of them contain.

Explanation:

Calculate the number of moles of [tex]\rm NaOH[/tex] formula units in that [tex]5.00\; \rm L[/tex] of [tex]2.50\; \rm M[/tex] [tex]\rm NaOH\![/tex] solution:

[tex]n(\mathrm{NaOH}) = c\cdot V = 5.00\; \rm L \times 2.50\; \rm mol \cdot L^{-1} = 12.5\; \rm mol[/tex].

Calculate the volume of a [tex]12.0\; \rm M[/tex] [tex]\rm NaOH[/tex] with that many [tex]\rm NaOH\![/tex] formula units:

[tex]\displaystyle V = \frac{n}{c} = \frac{12.5\;\rm mol}{12.0\; \rm mol \cdot L^{-1}}\approx 1.04\;\rm L[/tex].

That should be the volume of the [tex]12.0\; \rm M[/tex] [tex]\rm NaOH[/tex] solution needed to prepare that [tex]5.00\; \rm L[/tex] of [tex]2.50\; \rm M[/tex] [tex]\rm NaOH\![/tex] solution. However, [tex]1.04\; \rm L[/tex] corresponds to only about one-fifth the volume of a [tex]5.00\; \rm L\![/tex] solution. The difference in volume should be filled with pure water:

[tex]\begin{aligned}V(\text{water}) &\approx 5.00\; \rm L - 1.04\; \rm L = 3.96\; \rm L\end{aligned}[/tex].

Answer:

I never had a crush on anyone

Explanation:

Answer:

C₁₂H₂₂O₁₁ + H₂O     →    C₅H₁₂O₆ + C₆H₁₂O₆

Explanation:

Chemical equation:

C₁₂H₂₂O₁₁ + H₂O     →    C₅H₁₂O₆ + C₆H₁₂O₆

Source of sucrose:

Sucrose is present in roots of plants and also in fruits. It is storage form of energy. Some insects and bacteria use sucrose as main food. Best example is honeybee which collect sucrose and convert it into honey.

Monomers of sucrose and hydrolysis:

Sucrose consist of monomers glucose and fructose which are join together through glycosidic bond. Hydrolysis break the sucrose molecule into glucose and fructose. In hydrolysis glycosidic bond is break which convert the sucrose into glucose and fructose. Hydrolysis is slow process but this reaction is catalyze by enzyme. The enzyme invertase catalyze this reaction.

The given reaction also completely follow the law of conservation of mass. There are equal number of atoms of elements on both side of chemical equation thus mass remain conserved.

Answer:

HOPE THIS HELPED :) good luck! ❤️

Explanation:

A reactant is a substance that is present at the start of a chemical reaction. The substance to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.

Answer:

Reactants are the starting substances and products are the ending substances in a chemical reaction.  The atoms in reactants are arranged one way and are rearranged in a different way to form the products (in other words, reactants are chemically different from products). The properties of reactants differ from the properties of products.

Explanation:

Sample response on Edge 2021

Answer:

the reactivity and the valence electrons

Explanation:

the reactivity of the elements would have played a significant role in why such elements were grouped together. the number of valence electrons dictates how reactive an element is - the less valence electrons the more reactive it is. the column, group 1 in which these elements are put together in, show that each of the elements have 1 valence electrons and are therefore reactive.

you can go on to further explain what valence electrons are, explain what the group numbers are associated with the valence electrons and how valence electrons effect reactivity. further this, talk about how the three elements have the same number of valence electrons and therefore were grouped together

Answer:

Yes

Explanation:

As the number of animals that eat plants increase, the number of plants decrease. This is because the animals are eating a larger and larger number of plants and reducing the population.

When the number of plants gets too low, the animals will not be able to survive, and they will start to decrease in numbers. In turn, the plants will increase again. Eventually, they will reach an equilibrium.

Answer:

The corresponding wavelength is 2.4×10⁻³⁴ m.

Explanation:

Given data:

Mass of ball = 45.9 g  (45.9/1000 = 0.0459 kg)

Speed of ball = 61.0 m/s

Wavelength = ?

Solution:

Formula:

λ = h/mv

λ = wavelength

h = Planck's constant

m = mass

v = velocity

Now we will put the values in formula.

λ = 6.63×10⁻³⁴ kg.m².s⁻¹ / 0.0459 kg ×61.0 m/s

λ = 6.63×10⁻³⁴kg.m².s⁻¹ /2.8 Kg.m/s

λ = 2.4×10⁻³⁴ m

The corresponding wavelength is 2.4×10⁻³⁴ m.

Answer:

[tex]0.000056[/tex]

Explanation:

If [tex]pH[/tex] is given then hydronium ion concentration is equal to [tex]-log[H_3O^+][/tex]

The hydronium ion concentration can be found from the pH using the following formula:

Hydronium ion concentration = [tex]10^{-pH}[/tex]

As the pH of a HClO4 solution was measured as 4.251,

put [tex]pH=4.251[/tex]

So,

Concentration of HClO4 in the solution = [tex]10^{-4.251}=0.000056[/tex]