What is the isotope notation of selenium

Answer:

bacteria

Explanation:

Bacteria removes nitrogen from the air and converts it into a form that is usable by plants.

Answer:

Bacteria

Explanation:

I took the test and got it right

Answer:

2Cl (aq) + Pb (aq) -> PbCl² (s)

Explanation:

Answer:

Fe: 23.1%

N: 17.4%

O: 59.5%

Explanation:

You take the grams that each weigh on the periodic table and add it all up. Afterward you create fractions of each over the whole. (Example: Fe/Fe+N+O) then you divide and turn that decimal into a percentage.

Answer:

Antacids are bases that react stoichiometrically with acid. The number of moles of acid that can be neutralized by a single tablet of a commercial antacid will be determined by back titration.

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Answer:

What's the question so I can help?

I will just edit my answer when you have asked your question and post it here.

Explanation:

The dental assistant should respond to this patient’s concerns by telling him that the amount of x-ray is very minimal and can't cause any negative effect.

This is a penetrating form of electromagnetic radiation which produces images of the structures inside your body.

Exposure to large amounts of radiation could increase risk of cancer which is why minimal amounts which is safe is adopted.

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If 30 grams of KCl is dissolved at 10°C, 14 g of KCl should be added to make a saturated solution at 60 °C.

A saturated solution is a solution in which there is so much solute that if there was any more, it would not dissolve. Its concentration is the same as the solubility at that temperature.

At 10 °C, the solubility is 31.2 g KCl/100 g H₂O.

30 g KCl × 100 g H₂O/31.2 g KCl = 96 g H₂O

At 60 °C, the solubility is 45.8 g KCl/100 g H₂O.

96 g H₂O × 45.8 g KCl/100 g H₂O = 44 g KCl

44 g - 30 g = 14 g

If 30 grams of KCl is dissolved at 10°C, 14 g of KCl should be added to make a saturated solution at 60 °C.

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Answer:

Their structure is related to their function.

Explanation:

Protein structure is related to their function. Therefore, the correct option is option D among all the given options.

Proteins are huge biomolecular and macromolecular structures made up of one or even more long amino acid residue chains. Proteins serve a wide range of roles inside animals, including catalyzing metabolic events, DNA replication, reacting to stimuli, provides support to organisms and cells including transporting chemicals.

Proteins differ largely in their amino acid sequence, which is determined by the genetic code from their genes and generally culminates with protein folding into such a particular 3D structure that dictates its function. Protein structure is related to their function.

Therefore, the correct option is option D.

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Based on the fgiven K_{a} values of the acids, the equilibrim concentrations of[tex]HC_{2}H_{2}O_{2}[/tex] and [tex]NH_{4}^{+}[/tex] is dtermined using ICE tables.

An acid dissociation constant, [tex]K_{a}[/tex] of an acid is a measure of the strength of the acid in solution. The larger the [tex]K_{a}[/tex] value of an acid, the stronger the acid, therefore, acid dissociation constants are usually apply to only weak acids because strong acids have exceedingly large [tex]K_{a}[/tex] values.

It is written as a  qoutient of the equilibrium concentrations of the aqueous species in the acid solution.

For the weak acids such as [tex]HC_{2}H_{2}O_{2}[/tex] and [tex]NH_{4}^{+}[/tex], their equilibrim concentrations are determined using their [tex]K_{a}[/tex] values and an ICE table.

The pH of solutions are estimated using indicators such as methyl orange, methyl red and phenolphthalein. The colors of indicators change according to the pH of the solution

Acidic solutions have pH less than 7 while alkaline solutions have pH greater than 7.

Therefore, acids have low pH and weak acids have low [tex]K_{a}[/tex] values.

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Answer:

it,s is so many people do you want to go then

you are not study then stage change of it

Answer:

B Nematoda

Explanation:

Answer:

[tex]ch3ch2oh \: is \: alcohol \\ because \: it \: havve \: an \: oh \: grp \: \\ thank \: you[/tex]

The man has been missing for two days. The average temperature the previous 48 hours was 50° fahrenheit. 12-24 hours is the time. body was discovered.

Time is the ongoing progression of existence and things that happen in what seems to be an irrevocable order from the past, present, and forward into the future. It is a quantity that is a part of several measurements that are used to compare the length of events or the gaps between them.

To compare how long they last, to order events, and to measure how quickly things change in the real world or in our conscious experience. Along with the three spatial dimensions, time is frequently referred to as an a fourth dimension. A body was discovered in the woods. The man has been missing for two days. The average temperature the previous 48 hours was 50° fahrenheit. 12-24 hours, body was discovered.

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Answer:

A

Explanation:

Is not my personal answer, but here is what I found.

"This entity has been manually annotated by the ChEBI Team. Potassium chromate is the inorganic compound with the formula (K2CrO4). This yellow solid is the potassium salt of the chromate anion"

Answer:

The Bohr model show the protons in a carbon atom using the model;  "Electrons move in fixed orbits around a nucleus of protons and neutrons."

According to Bohr's model of the atoms, the Rutherford model is basically correct. This implies that Bohr model accepts the idea of a nucleus containing nucleons(protons and neutrons).

In addition, the model also postulates that electrons are found in fixed orbits. These fixed orbits are called energy levels or shells.

A graphic description of this is shown in the image attached to this answer.

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Explanation:

Answer:

what is picture 4 you need to show it

H_2S+O_2--->SO_2+H_2O

Balance it

So

Molar mass of oxygen=2(16)=32g/mol

Molar mass of SO_2=2(16)+32=32+32=64g/mol

Moles of oxygen:-

Here

Moles of so_2

Mass of water

Given the data from the question, the mass of arsenic that contains 1.23×10²⁰ atoms is 0.0153 g

6.02×10²³ atoms = 1 mole of arsenic

But

1 mole of arsenic = 75 g

Thus, we can say that:

6.02×10²³ atoms = 75 g of arsenic

6.02×10²³ atoms = 75 g of arsenic

Therefore,

1.23×10²⁰ atoms = (1.23×10²⁰ × 75) / 6.02×10²³ atoms)

1.23×10²⁰ atoms = 0.0153 g of arsenic

Thus, 1.23×10²⁰ atoms is present in 0.0153 g of arsenic

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Answer:

  m

Explanation:

Answer:

CN is your answer.

Explanation:

Hope this helps!!!

Answer: city w

Explanation:

cities w,y,z all use renewable energy (sun, water, wind) which offput any greenhouse emmissions,

city w uses coal which produces greenhouse gases when used (burnt).

hope this helped! ♡

The reaction rate is affected if the vitamin C is added in lower quantity due to lower amount of reactants.

If you added 40.0 mL of Vitamin C stock solution instead of 25.0 mL when preparing Solution, the reaction rate is affected because of the lower amount of reactant for the chemical reaction. If the reactants are present in larger amount then the products are also produced in large concentration.

So we can conclude that the reaction rate is affected if the vitamin C is added in lower quantity due to lower amount of reactants.

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Answer:

An adult male is between 2.4-3m (8-10 feet) in size and weighs between 350-680kg (775-1500lbs). Females are slightly smaller at around 1.8-2.4m (6-8 feet) and weigh between 150-250kg (330-550lbs).

Answer:

pasture/range

Explanation:

this is because more than 1/3 of the country's land is being used for this mean alone.

Answer: Forest

Explanation: The largest percentage of land use in the United States is for forests.

Answer:

Sodium nitride is exothermic reaction and hydrochloric acid is endothermic reaction.

Molar mass of NaHCO_3

Now

[tex]\\ \sf\longrightarrow No\:of\:moles=\dfrac{Given\:mass}{Molar\:mass}[/tex]

[tex]\\ \sf\longrightarrow No\:of\; moles=\dfrac{2.61}{84}[/tex]

[tex]\\ \sf\longrightarrow No\:of\:moles=0.0312mol[/tex]

Magnetic lines of force are are strongest at each pole, where the field lines are closest together.

A magnetic field is the region around a magnet where the influence of the magnet can be felt. The magnetic line of force show the intensity as well as the direction of the magnetic field.

The fact that is true for all magnetic fields is that they are strongest at each pole, where the field lines are closest together.

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Answer:

Explanation:

On the reactant side, XeO3 is a strong oxidizing agent. It can be a solid or gas. Most likely it is in a solid state.

H+ and Br- combine to form HBr which is a weak acid. So H+ and Br- are in an aqueous state.

On the product side, both Br2 and Xe are not very soluble in water. They will be in gaseous state and H2O is water i.e. liquid state.

Answer: 4.7432 L

Explanation:

Use stoichiometry: .4235 mol CuCl2 (1 mol I2 / 2 mol CuCl2)(22.4 L / 1 mol I2) = 4.7432 L :)