How many unpaired electrons does lithium have.

Las sustancias a la izquierda de la flecha en una ecuación química se denominan reactivos. Un reactivo es una sustancia que está presente al comienzo de una reacción química. Las sustancias a la derecha de la flecha se denominan productos.

A sample of water is taken, and the amount of acid required to bring it to a pH of 4.2 is then calculated to determine the total alkalinity.

By titrating the water sample with sulfuric acid that has known pH, volume, and concentration values, it is possible to estimate the alkalinity of water. The amount of sulfuric acid required to reach the end point and the reaction's stoichiometry are used to calculate the concentration of alkalinity in water.

The concentration of acid protons [H+] is what is commonly referred to as ph. The alkalinity of a solution, on the other hand, determines how well it can neutralize acids. Ions that are alkaline incorporate acid protons into their molecules so that they are not available as a free acid that can cause the pH to decrease.

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Answer:

Explanation:

given Olive oil costs $42.94 per gallon

1 ton ( 2000 lbs)  of olives is needed for 20 gallons of oil

1 acre makes 5,000 lbs

40,000 acres = 5,000*40,000 = 200,000,000 lbs of oilves

200,000,000 / 2,000 = 100,000 tons of olives

100,000*20 = 2,000,000  gallons of oil

2,000,000 * $42.94 = $85,880,000

Answer: Soils are formed through the interaction of five major factors: time, climate, parent material, topography and relief, and organisms.

Soil structure affects plant growth in many, often surprising, ways. The most obvious effects are on root growth, which is strongly inhibited by hard soil, and which in turn influences the ability of the root system to extract adequate water and nutrients from the soil.

Explanation:

https://www.publish.csiro.au/sr/pdf/SR9910717

This is where I gather some info.  

Answer:

Image result for What evidence in Side View lets you know that upwelling is happening in these locations?

Winds blowing across the ocean surface often push water away from an area. When this occurs, water rises up from beneath the surface to replace the diverging surface water. This process is known as upwelling.

Explanation:

Molar mass of H_2SO_4

\(\\ \rm\hookrightarrow Mass=No\:of\:moles\times Molar\:mass\)

\(\\ \rm\hookrightarrow Mass=0.5(98)\)

\(\\ \rm\hookrightarrow Mass=49g\)

Answer:

There are multiple ways to check mass but I'll tell you one. Look below

Explanation:

One easy way of checking atomic mass is by adding protons and neutrons.

For example:

We have 5 protons and 4 neutrons.

5+4=9

I hope this helps (:

Answer:

Typical organic fertilizers include mineral sources, all animal waste including meat processing, manure, slurry, and guano, plant based fertilizers, such as compost, and biosolids.

Answer:

V₂ = 545.79 mL

Explanation:

Given data:

Initial volume = 1000 mL

Initial pressure = 1 atm

Initial temperature = 273 K

Final temperature = 298 K

Final volume = ?

Final pressure = 2 atm

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

V₂ = P₁V₁ T₂/ T₁ P₂  

V₂ = 1 atm × 1000 mL × 298 K / 273 K × 2 atm

V₂ = 298000 atm .mL. K / 546 K.atm

V₂ = 545.79 mL

Answer:

A.

The sound is transmitted through water until it reaches the other whale.

Explanation:

When one whale makes a sound, the sound is transmitted through water until it reaches the other whale. The sound causes a ripple-like effect in the water, producing waves that travel in the water. The waves are heard in all directions. This is why humans can hear the sounds animals make underwater.

The statement which best describes how the sound gets to the other whale is that all of the sounds absorbed by water change to heat before getting to the other whale. Thus, the correct option for this question is A.

The transmission of sounds is generally carried out through a medium in the form of waves. These sound waves involve the pattern of disturbance caused by the movement of energy.

In an aquatic environment, when one whale successfully constructs a sound, the sound is effectively transmitted through the medium that is known as water.

It remains in the form of waves until it reaches the other whale. The sound in a waveform provokes a ripple-like effect in the water and travels in the water. The waves are effectively heard in all directions.

Therefore, the correct option for this question is A.

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Answer:

A

Explanation:

because number of particle = moles × 6.02 × 10^23

which gives the answer as an A

2.41x10²⁴ molecules are in 4 moles of carbon monoxide (CO). Therefore, the correct option is option A.

The smallest recognizable unit into that a pure substance may be divided while retaining its composition as well as chemical properties is a molecule, which is a collection of atoms that are at least two in number. Until parts made up of a single molecule are reached, the division of an example of a substance smaller progressively smaller parts does not result in a change with regard to its composition nor its chemical properties.

Still smaller sections of the substance are produced by further subdivision, and these components are always different chemically and typically have different compositions from the initial substance. The chemical links that link the atoms in the molecule together are severed during this final step of fragmentation.

molecules =  moles × 6.022×10²³

                  = 2.41x10²⁴  

Therefore, the correct option is option A.

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a)  The exponential decay rate of the chemical is approximately 0.2310 per hour. The exponential decay rate can be determined using the formula:

decay rate (k) = ln(2) / half-life

Given that the half-life is approximately 3 hours, we can calculate the decay rate:

decay rate (k) = ln(2) / 3

decay rate (k) ≈ 0.2310 (rounded to four decimal places)

Therefore, the exponential decay rate of the chemical is approximately 0.2310 per hour.

b) To determine how long it will take for 97% of the chemical to leave the body, we can use the exponential decay formula:

amount remaining = initial amount × \(e^(-kt)\)

We want to find the time when the amount remaining is 97% of the initial amount. Thus, we can rewrite the equation as:

0.97 = \(e^(-kt)\)

Taking the natural logarithm (ln) of both sides:

ln(0.97) = -kt

Solving for t:  t = -ln(0.97) / k

Substituting the previously calculated decay rate:

t ≈ -ln(0.97) / 0.2310

Using a calculator, we find:

t ≈ 10.152 (rounded to three decimal places)

Therefore, it will take approximately 10.152 hours for 97% of the chemical consumed to leave the body.

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Answer:

is there any alian on the mars

The balanced half-reactions are: Oxidation half-reaction: 4Co → 4Co2+ + 8e-Reduction half-reaction: O2 + 2e- → 2O2 -

Given equation: 3O2+4Co⟶2Co2O3Using the symbol e− for an electron. The redox reaction can be broken down into two half-reactions. The reduction half-reaction is the one in which a species gains electrons and the oxidation half-reaction is the one in which a species loses electrons. The half-reactions are as follows: Reduction Half-reaction Half-reaction equation: O2 + 2e- → 2O2 -Oxidation number of oxygen in O2=0 and in O2^-= -1Charge on the left side = 0Charge on the right side = 2 x (-1) = -2Thus, 2 electrons are added to the left side to balance the charge, making the half-reaction:O2 + 2e- → 2O2 -Oxidation Half-reaction Half-reaction equation: 4Co → 4Co2+ + 8e-Oxidation number of cobalt in Co=0 and in Co2+ =+2Charge on the left side = 0Charge on the right side = 4 x (+2) + 8 x (-1) = -4Thus, 8 electrons are added to the right side to balance the charge, making the half-reaction:4Co → 4Co2+ + 8e-Thus, the balanced half-reactions are: Oxidation half-reaction: 4Co → 4Co2+ + 8e-Reduction half-reaction: O2 + 2e- → 2O2 -

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Given the various data from the question, the answers to each question is given below:

Avogadro's hypothesis

1 mole of K₂CrO₄ = 6.02×10²³ molecules

Therefore,

0.6 mole of K₂CrO₄ = 0.6 × 6.02×10²³

0.6 mole of K₂CrO₄ = 3.612×10²³ molecules

1 mole of K₂CrO₄ contains 2 moles of K.

Therefore,

0.6 mole of K₂CrO₄ will contain = 0.6 × 2 = 1.2 mole of K

From Avogadro's hypothesis,

1 mole of K = 6.02×10²³ atoms

Therefore,

1.2 mole of K = 1.2 × 6.02×10²³

1.2 mole of K = 7.224×10²³ atoms

Therefore, we can say that

0.6 mole of K₂CrO₄ = 7.224×10²³ atoms of K

Molarity is defined as:

Molarity = mole / Volume

From the question given above, we obtained the following:

Molarity = mole / Volume

Molarity = 0.5 / 2

Molarity = 0.25 M

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

Percentage = (mass of solute / mass of solution) × 100

Percentage of sugar = (50 / 250) × 100

Percentage of sugar = 20%

Total volume = 2 L

Percentage of vinegar = 5%

Volume of vinegar =?

Volume = percent × total volume

Volume of vinegar = 5% × 2

Volume of vinegar = 0.1 L

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Answer:

12 grams of hydrogen gas

and 56 grams of nitrogen gas

The molar mass of ammonia is 17 g/mol.

68 grams of ammonia corresponds to  

17g/mol

68g

​

=4moles

4 moles of ammonia will be obtained from  

2

4×1

​

=2  moles of nitrogen and  

2

4×3

​

=6  moles of hydrogen.

The molar masses of nitrogen and hydrogen are 28 g/mol and 2 g/mol respectively.

2 moles of nitrogen corresponds to 2×28=56  grams.

6 moles of hydrogen corresponds to 6×2=12  grams.

Enzymes are proteins that catalyze biochemical reactions in the body. They have a specific three-dimensional shape that is crucial for their function.

When the temperature is raised too much, the protein structure can become denatured, meaning that the enzyme loses its shape and can no longer function properly.

This is because high temperatures can disrupt the weak bonds that hold the protein structure together, such as hydrogen bonds and van der Waals forces. As a result, the active site of the enzyme, which is where the substrate binds and the reaction occurs, is altered or destroyed, preventing the enzyme from performing its catalytic function.

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Answer: −182.96 °C; −297.33 °F

I think

Answer:

162374 farenheit

Explanation:

You need to convert the 90.19k to Farenheit.

You can even use google, but if you need the formula it's (0°C × 9/5) + 32 = 32°F

Answer:

As ethanoic acid is basically a acid

it will turn blue litmus red and on a red litmus paper

there will be no effect

Cations have more protons than electrons, Anions result when atoms gain an electron.

The electron, a subatomic particle, has a negative one elementary charge electric charge. The electron, a member of the first generation of the lepton particle family, is usually regarded as an elementary particle because it has no known components or substructure.

A few straightforward rules can be used to calculate the quantity of protons, neutrons, and electrons present in an atom. The atomic number and the number of protons in the atom's nucleus are equal (Z). A neutral atom has the same number of protons and electrons as protons.

Around the nucleus, electrons are positioned in several shells. Only a fixed amount of electrons can fit in each subsequent shell. Filling begins with the innermost shell.

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Answer:

The answer is B

Explanation:

A solution that contains a relatively low concentration of solute is called dilute, and one with a relatively high concentration is called concentrated. If we add more salt to a saturated solution of salt, we see it fall to the bottom and no more seems to dissolve.

The mass percent of sucrose in solution is 5.19%

The concentration of an element in a compound or element of a combination can be expressed as a mass percentage. The mass percent of the element in the compound is obtained by dividing the mass of the element in 1 mole of the compound by the molar mass of the compound, which is then multiplied by 100. Plants including fruits, vegetables, and nuts all contain varying amounts of sucrose, a naturally occurring sugar. Commercial production of sucrose is also carried out together with sugar cane and sugar beets.

Calculating,

Mass Percent = Mass Solute/(Mass Solute + Mass Solvent) X 100%

1 g H2O = 1 mL H2O = 59.3 mL H2O = 59.3 g H2O

Mass Percent = 3.25g / (3.25 g + 59.3 g) X 100% = 5.19%

The solution is 5.19%% sucrose by mass.

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Answer:

A lot

Explanation:

- As you go down a group, the elements get larger in size

- All of the elements of the same group have the same # of valence electrons

- As you go to the right of a period, the # of electrons in the outermost shell increases

- The elements at the top right of the table have the highest electronegativity

- Groups 13 through 17 are nonmetals

- The last group contains noble gases

etc.

Answer:

a) acidic; [H+] = 10^-2.5 = 3 x 10^-3

b) basic; [H+] = 10^-11.7 = 2 x 10^-12

c) slightly acidic (almost neutral); [H+] = 10^-6.8 = 1.6 x 10^-7

d) acidic; [H+] = 10^-3.31 = 4.9 x 10^-4

Explanation:

pH < 7 is acidic; pH > 7 is basic; pH = 7 is neutral

[H+] = 10^-pH

A is acidic, B is basic, C is slightly acidic, and D is acidic.

What is pH?

pH, quantitative measure of the acidity or basicity of aqueous or other liquid solutions.

a) Acidic; [\(H^+\)] = \(10^-^2^.^5\) = \(3 X 10^-^3\)

b) Basic; [\(H^+\)] = \(10^-^1^1^.^7\) = \(2 X 10^-^1^2\)

c) Slightly acidic (almost neutral); [\(H^+\)] = \(10^-^6^.^8\)= \(1.6 X 10^-^7\)

d) Acidic; [\(H^+\)] = \(10^-^3^.^3^1\)= \(4.9 X 10^-^4\)

pH < 7 is acidic; pH > 7 is basic; pH = 7 is neutral

Hence, a is acidic, b is basic, c is slightly acidic, and d is acidic.

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Explanation: