What is the value of Qwhen 0.0010 MAI and 0.0010 MOH are combined in 1.0 L of solution? Will a precipitate of Al(OH),(s) form? The K,, of Al(OH),(s) is 2.0 x 10- Select the correct answer below O Q=1.0 x 10-Yes, a precipitate will form. O Q-1.0 x 10-No, a precipitate will not form. O Q = 10 x 10-7. Yes, a precipitate will form. O Q=1.0 x 10-12. No, a precipitate will not form. FEEDBACK MORE INSTRUCTION SUBMIT Content tribucion

The atmospheric concentration of a gas depends on its emission into the atmosphere and its rates of physical, chemical and biological removal. The time to lower the concentration of the gas to 37% of its original amount is its atmospheric lifetime.

The measurements of CO2 equivalents in parts per million CO2 is termed as atmospheric concentration. The pressure exerted by the atmosphere on the gas is called atmospheric pressure.

The atmospheric lifetime of a species mainly measures the time which is require to restore equilibrium in the atmosphere that follows a sudden decrease or increase in the concentration of the species in the atmosphere.

Emission is something which can be released, emitted or discharge.

Types of emission

Thus, we concluded that the atmospheric concentration of a gas depends on its emission into the atmosphere and its rates of physical, chemical and biological removal. The time to lower the concentration of the gas to 37% of its original amount is its atmospheric lifetime.

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The equilibrium concentration of HI is 1.56 x 10-5 M and the equilibrium concentration of H₂ and I₂ is 7.8 x 10-6 M.

Given: The equilibrium constant, Kp, for the following reaction is 1.80 x 10-2 at 698 K.2HI(g) → H₂(g) + I₂ (g)

When equilibrium is reached, the concentration of H₂ is found to be 2.80 x 10-3 M. Calculate the equilibrium concentration of HI and I2.

Solution: Equilibrium constant, Kp = 1.80 x 10-2 at 698 K Since the equation is 2HI(g) → H₂(g) + I₂ (g),therefore the expression for Kp is given as,

Kp = [H₂] [I₂] / [HI]²

At equilibrium,[H₂] = 2.80 x 10-3 M We are to find the equilibrium concentration of HI and I2. Let the equilibrium concentration of HI be x and the equilibrium concentration of I2 be y. Molar concentration of H₂ = 2.80 x 10-3 M Using the equilibrium constant expression, Kp = [H₂] [I₂] / [HI]²= (2.80 x 10-3) (y) / (x)²= 2.80 x 10-3 (y) / (x²)---------------------eqn1We also know that,2HI(g) → H₂(g) + I₂ (g)Initially (before the reaction begins), concentration of HI = x and concentration of H₂ and I₂ are zero. Thus, initially, H₂ = 0and I₂ = 0At equilibrium, 2HI(g) → H₂(g) + I₂ (g).

Thus, initially the concentration of HI = x-moles. Then, for every 2 moles of HI that is converted, one mole of H₂ and one mole of I₂ are produced. So, the concentration of H₂ and I₂ at equilibrium would be x/2 moles. Because, for every 2 moles of HI that is converted, one mole of H₂ and one mole of I₂ are produced.[HI] = x M[H₂] = [I₂] = x/2 M Substituting the values in the expression derived above in eqn1,Kp = 1.80 x 10-2 = 2.80 x 10-3 (y) / (x²)= 2.80 x 10-3 (y) / x²x² = (2.80 x 10-3 y) / (1.80 x 10-2)= 0.15555y / 1Substituting the value of x² in the equation 1,1.80 x 10-2 = 2.80 x 10-3 (y) / 0.15555y1.80 x 10-2 = 18.00 y / 15555y1.80 x 10-2 = y / 865.3y = 1.56 x 10-5 M[H₂] = [I₂] = x/2 = (1.56 x 10-5 M) / 2= 7.8 x 10-6 M

∴ The equilibrium concentration of HI is 1.56 x 10-5 M and the equilibrium concentration of H₂ and I₂ is 7.8 x 10-6 M.

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Answer:28.01 grams

Explanation:

Answer:

Hello! Your answer would be, BELOW

Explanation:

A) True

B) Change of color

Hope I helped! Ask me anything if you have any questions. Brainiest plz!♥ Hope you make a 100%. Have a nice morning! -Amelia♥

Answer: Empirical formula, CH; Molecular formula, C2H2

Explanation:

When atoms form chemical bonding then the atoms attain Noble gas configuration.

Noble gas configuration of an atom includes the fundamental image of the ultimate noble fueloline previous to that atom, observed via way of means of the configuration of the ultimate electrons.so for sodium, we make the substitution of [Ne] for the 1s22s22p6 a part of the configuration. Sodium's noble fueloline configuration becomes [Ne]3s1.

Covalent bonds, atoms percentage pairs of electrons, at the same time as in ionic bonds, electrons are absolutely transferred among atoms in order that ions are formed.During the formation of a chemical bond, the predicted end result is that the electrons will whole a noble fueloline configuration in each atoms. Typically, while atoms shape a chemical bond, the predicted end result is that the electrons.

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4Na + O₂ → 2Na₂O is balanced equation.

Hence, Option (B) is correct answer.

The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.

Now check all the options one by one:

Option (A): 2H₂ + O₂ → 4H₂O

Reactant Side               Product Side

H = 4                               H = 8

O = 2                               O = 4

Here number of atoms of H on the reactant side is 4 and number of atom on product side is 8. H atoms are not balanced in this equation. Hence the given equation is not balanced.

Option (B): 4Na + O₂ → 2Na₂O

Reactant Side               Product Side

Na = 4                            Na = 4

O = 2                              O = 2

Here all the atom on reactant side and product side are equal. Hence the given equation is balanced.

Option (C):  Fe₂O₃ + H₂ → 2Fe + 3H₂O

Reactant Side               Product Side

Fe = 2                              Fe = 2

O = 3                                O = 3

H = 2                                H = 6

Here number of atoms of H on the reactant side is 2 and number of atom on product side is 6. H atoms are not balanced in this equation. Hence the given equation is not balanced.

Option (D): CH₄ + O₂ → CO₂ + H₂O

Reactant Side               Product Side

C = 1                                C = 1

H = 4                               H = 2

O = 2                               O = 3

Here H atoms on the reactant and product side is not equal and O atoms are also not equal on the reactant side and product side. Hence, the given equation is not balanced.

Thus from the above conclusion we can say that The balanced equation from the given options is 4Na + O₂ → 2Na₂O

Hence, Option (B) is correct answer.

Disclaimer: The question was given incomplete on the portal. Here is the complete question.

Question: Which of the following equations is balanced?

(A) 2H₂ + O₂ → 4H₂O

(B) 4Na + O₂ → 2Na₂O

(C) Fe₂O₃ + H₂ → 2Fe + 3H₂O

(D) CH₄ + O₂ → CO₂ + H₂O

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Answer:

\(3.03 \: or \: 3\frac{1}{33} (in \: fration) \: hours\)

Explanation:

33 miles takes 1 hour

1 " " 1/33 "

100 " 100×1/33

3.03 hours

Answer:

1 mol Ca(OH)2 produces 2 mol NH3

4 mol Ca(OH)2 will produce 8 mol NH3

1 mol NH3 contains 6.022*10^23 molecules NH3

8 mol NH3 contain 8*6.022*10^23 = 4.8*10^24 molecules NH3

Explanation:

The maximum mass of zinc sulfate crystals that could obtain is about 6 g from the zinc of 1.36 g.

The theoretical yield of the reaction can be defined as the amount of product determined from stoichiometric calculations.

The given chemical formula of the zinc sulfate crystals ZnSO₄.7H₂O. the molecular mass of the zinc sulfate crystals is 287 g/mol.

The atomic mass of the zinc = 65.3 g/mol

The 65.3 g of Zn present in zinc sulfate crystals = 287 g

Then 1.36 g of zinc was used to prepare zinc sulfate crystals = (287/65.3) × 1.36 = 6g.

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Answer:

65 g/100 mL of water

Explanation:

Answer:

65g/100ml of water.

Explanation:

Edge 2021.

0.24 g of LiOH are needed to make 100 ml of a 0.1 m solution.

Lithium hydroxide (LiOH), commonly obtained by the reaction of lithium carbonate with lime, is used in making lithium salts (soaps) of stearic and other fatty acids; these soaps are widely used as thickeners in lubricating greases.

Lithium hydroxide is an inorganic compound with the formula LiOH. It can exist as anhydrous or hydrated, and both forms are white hygroscopic solids. They are soluble in water and slightly soluble in ethanol. Both are available commercially.

LiOH (Lithium hydroxide) is a base. It is because it releases OH– (hydroxide-ion) in water. According to theories, a substance that can accept a proton or donate electrons or react with acid is classified as a base. LiOH reacts with strong acid HCl that produce LiCl and water.

The molarity of LiOH is 0.1M

The given volume is,

M = W1 × 1000/m1 × V(ml)

m1 = molecular mass of LiOH = 24

putting the values in the previous equation,

0.1 = W1 × 1000/24 × 100

W1 = 0.1 × 24 ×100/1000

⇒ 0.24 grams of LiOH is required.

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CHCl3, also known as chloroform, is a polar molecule because it has a net dipole moment. This means that the molecule has a positive and negative end, which are not located at the same position in the molecule, and thus, the molecule does not have symmetry.

This asymmetry creates a separation of charge within the molecule, with the chlorine atom being more electronegative than the hydrogen and carbon atoms, meaning that it attracts electrons more strongly. In CHCl3, the three chlorine atoms are bonded to the central carbon atom via covalent bonds, with each of the chlorine atoms sharing one of their electrons with the carbon atom. Since the electronegativity of chlorine is greater than that of carbon and hydrogen, the electrons in the covalent bonds are attracted more towards the chlorine atoms. This creates a partial negative charge on the chlorine atoms and a partial positive charge on the carbon and hydrogen atoms. As a result, the molecule has a net dipole moment and is considered polar.

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Answer:

blended is better than synthetic fibre. because blended fabrics have quality of synthetic and natural fibres so they are more better than fabrics. For example terrycot. Blended Fibres are considered better than individual synthetic fibres because they show the advantages of 2 or more fibres.

Answer:

The options that apply to the description of grid-lines of the map are;

They are measured in degrees

They set up a reference system

They divide Earth into four equal parts

FIRST OPTION , SECOND OPTION and FIFTH OPTION are correct.

Explanation:

FIRST OPTION gave the describtion that the grid-lines of the map are measure in degrees,this option is applied to the gridlines on a map because the grid are lined as a result of angular measurement which makes it to makes the unit to be measured degrees and angles.

SECOND OPTION described it as been set up by a reference system which let us know that the area that are plotted were all grid as a result of the size

FIFTH OPTION also applied to the

description of the gridlines on a map because the Earth is divided into 4 equal parts through the Prime Meridian i.e the latitudinal line and longitudinal line .

.

Answer:

They are measured in degrees.

They set up a reference system.

They divide Earth into four equal parts.

Explanation:

i took the test

E1 reactions are favored by compounds that can form stable carbocations, E2 reactions are favored by compounds with easily accessible hydrogen atoms, and SN1 reactions are favored by compounds with less steric hindrance around the reaction site.

I would need the list of compounds to compare. However, I can provide you with a general explanation of the factors that affect the rate of E1, E2, SN1, and SN2 reactions.
a. E1 reaction: E1 reactions are favored by compounds that can form stable carbocations. Compounds with tertiary carbons (connected to three other carbons) will react faster due to the greater stability of the resulting carbocation.
b. E2 reaction: E2 reactions are favored by compounds with easily accessible hydrogen atoms on the β-carbon (the carbon next to the leaving group). Bulky bases and more substituted substrates (such as tertiary carbons) generally lead to faster E2 reactions.
c. SN1 reaction: SN1 reactions are favored by compounds that can form stable carbocations, similar to E1 reactions. Compounds with tertiary carbons will react faster in SN1 reactions, while compounds with primary carbons will react slower.
d. SN2 reaction: SN2 reactions are favored by compounds with less steric hindrance around the reaction site. Compounds with primary carbons (connected to only one other carbon) will react faster, while compounds with tertiary carbons will react slower.

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Chromium(III) chlorate (Cr(ClO3)3) is a solid (s) that dissolves in water to form aqueous chromium(III) ions (Cr^3+, aq) and 3 aqueous chlorate ions (ClO3^-, aq). The coefficients represent the lowest possible whole numbers to balance the equation.

When Cr(ClO3)3 is dissolved in water, it dissociates into its respective ions. The balanced chemical equation for the dissolution of Cr(ClO3)3 can be written as:

Cr(ClO3)3(s) → Cr3+(aq) + 3ClO3-(aq)

This equation shows that one molecule of solid Cr(ClO3)3 dissociates into one Cr3+ ion and three ClO3- ions in aqueous solution. The state-of-matter for Cr(ClO3)3 is solid (s), while the state-of-matter for Cr3+ ion and ClO3- ions is aqueous (aq). The coefficients in the equation are already in their lowest possible whole number form.

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Answer:

13.3 mL

Explanation:

To make a 1.00 M solution of HCl from a 15.0 M concentrated solution, we can use the dilution formula:

M1V1 = M2V2

∴ M1 is the initial concentration, V1 is the initial volume, M2 is the final concentration, and V2 is the final volume.

We are given:

M1 = 15.0 M (concentrated HCl solution)

V1 = unknown

M2 = 1.00 M (desired final concentration)

V2 = 200 mL (desired final volume)

Plugging in these values, we get:

15.0 M x V1 = 1.00 M x 200 mL

Simplifying and solving for V1, we get:

V1 = (1.00 M x 200 mL) / 15.0 M

V1 = 13.3 mL (rounded to three significant figures)

Therefore, we need to measure 13.3 mL of concentrated HCl and then add enough water to bring the total volume up to 200 mL to make a 1.00 M solution.

Magnesium is a mineral that has been shown to help lower blood pressure when consumed in adequate amounts.

Magnesium has been suggested as a way to improve (lower) blood pressure when consumed in adequate amounts, but there is not enough evidence to suggest that any other mineral, such as zinc or iron, can have the same effect. It does this by helping the body to relax and dilate the blood vessels, allowing for more efficient blood flow and reducing the pressure on the walls of the vessels. Magnesium can be found in many foods, such as nuts, whole grains, legumes, green leafy vegetables, and seafood. It is also available in supplement form.

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complete question: which mineral has not been suggested as a way to improve (lower) blood pressure when consumed in adequate amounts

Potassium

Magnesium

iron

calcium

Answer:

Molarity(M) = 0.24M in (NH₄)₂Cr₂O₇.

Explanation:

By definition a solution is a homogeneous physical mixture of two substances, a solute (item in least amount) and solvent (item in greatest amount). Typically the solution is generally described in terms of the concentration of solute in solution (solute + solvent). Concentration is, by definition amount of solute divided the volume of solution. That is ...

concentration = amount solute / volume of solution

There are numerous unit expressions of concentration such as lbs/gal, lbs/ft³, grams/ml and molarity(M). For this problem, Molar Concentration following concentration definition is ...

Molarity(M) = moles solute / volume of solution in liters

moles of (NH₄)₂Cr₂O₇ = 30.05g/252.07g/mole = 0.12mole

Volume of Solution = 500ml = 0.500Liters

∴Molarity = [(NH₄)₂Cr₂O₇] = 0.12 moles / 0.500L = 0.24M in (NH₄)₂Cr₂O₇.

Note => the brackets [ ] around the formula (NH₄)₂Cr₂O₇ indicates Molar concentration.

The supporting initiatives that focus on reforestation and restoration can help restore damaged areas and promote the resilience of the forest ecosystem.

Forest biomes are classified based on their geographical location, climate, and dominant plant species. The main classifications of forest biomes include tropical rainforests, temperate forests, and boreal forests.

Tropical rainforests are found in regions near the equator and are characterized by high temperatures, abundant rainfall, and a dense canopy of tall trees. They are known for their incredible biodiversity and complex ecosystems.

Temperate forests are found in regions with moderate climates and distinct seasons. They have a mix of deciduous and evergreen trees, and their foliage changes color in autumn. These forests support a wide range of plant and animal species.

Boreal forests, also known as taiga, are found in subarctic regions and are characterized by long, cold winters and short summers. They consist mainly of coniferous trees like spruce, pine, and fir. Boreal forests are essential for regulating global climate and support unique wildlife adapted to harsh conditions.

Some environmental concerns about forest biomes include deforestation, habitat loss, biodiversity loss, climate change, and illegal logging. Deforestation, primarily driven by human activities such as agriculture, logging, and infrastructure development, leads to the destruction of forests and the loss of wildlife habitats. This loss of biodiversity can have far-reaching ecological consequences.

Climate change also poses a threat to forest biomes, as it can alter precipitation patterns, increase the frequency of wildfires, and disrupt ecosystems. Illegal logging exacerbates these issues by contributing to deforestation and forest degradation.

One main contribution forests make to the environment is their role in carbon sequestration. Forests absorb carbon dioxide from the atmosphere through photosynthesis and store it in their biomass and soil. This helps mitigate climate change by reducing the concentration of greenhouse gases in the atmosphere.

The Amazon Rainforest, located in South America, is a prime example of a forest biome. It is the largest tropical rainforest in the world and plays a crucial role in global climate regulation and biodiversity conservation. However, the Amazon Rainforest faces significant environmental issues, including deforestation, illegal logging, and land conversion for agriculture.

Deforestation in the Amazon is primarily driven by the expansion of agricultural activities, such as cattle ranching and soybean production. This results in habitat loss for countless plant and animal species, including endangered ones. The clearing of land also releases large amounts of stored carbon into the atmosphere, contributing to climate change.

Solving the environmental concerns in the Amazon Rainforest requires a multi-faceted approach. It involves implementing stricter regulations and enforcement against illegal logging and land encroachment, promoting sustainable agricultural practices, supporting local communities, and increasing international efforts to protect and conserve this vital ecosystem.

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Answer:

So, the atomicity of noble gases is 1. Example. ... So, the atomicity of hydrogen, nitrogen, oxygen, chlorine, bromine and iodine is 2 each.

Explanation:

So, the atomicity of noble gases is 1. Example. ... So, the atomicity of hydrogen, nitrogen, oxygen, chlorine, bromine and iodine is 2 each.

could  help

The average atomic mass of iron Isotopes is 55.90 amu.

We know that because there is a phenomenon that we call isotopy, the average atomic mass of the elements is often not a whole number. The atoms of the elements tend to differ in the number of the neutrons that they posses. Thus isotopes are the atoms of the same elements that do not have the same number of neutrons.

We now have to obtain the relative atomic mass of the iron atom while taking note of the different isotopes that we gave in the atom as we can see.

We thus have;

(54 * 5.80/100) + (56 * 91.72/100) + (57 * 2.20/100) + (58 * 0.28​/100)

= 3.13 + 51.36 + 1.25 + 0.16

= 55.90 amu

The average atomic mass of the iron as we can see from the calculation that is based on the table is obtained as 55.90 amu.

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Answer:

156.78 °C

Explanation:

First we convert 9.8 grams of NH₃ into moles, using its molar mass:

Then we can use the PV=nRT formula to calculate the temperature, where:

We input the data:

And solve for T:

Finally we convert 429.94 K to °C:

Answer:

Để trung hoà 50 ml hỗn hợp X gồm HCl và H2SO4 cần dùng 20 ml dung dịch NaOH 0,3M. Cô cạn dung dịch sau khi trung hoà thu được 0,381 gam muối khan. a) Xác định nồng độ mol của các axit trong X. b) Tính pH của dung dịch X.

The number of valence electrons for neutral atoms is the same as the number of the atom's main group. A periodic table element's column can be used to determine its main group number. For instance, carbon, which belongs to group 4, has four valence electrons.

For an atom to become a charged ion and create an ionic connection with another atom, it must have between one and three valence electrons, which it will lose.

Atoms can be very reactive or extremely inactive depending on how many valence electrons they have. The quantity of valence electrons in an atom also affects whether or not it is more likely to lose or acquire electrons during chemical processes. Metals may carry electricity because they readily give away electrons.

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Answer: The solute molecules were too big to fit through the wrong shape.

Explanation: The solute particles were unable to go in and out of the cell because of the principal guiding the process of Osmosis and the cell membrane of the biological cell. Osmosis prevents the solute particles from leaving the cell but rather permits the movement of solvent from the region of higher solute concentration to the region of lower solute concentration in other to achieve a state of equilibrium in the biological cell.

The cell membrane is made up of semi permeable membrane which is a type of membrane that allows certain types of molecules to pass through it. Therefore the solute molecules couldn't pass through the cell membrane because the semi permeable membrane has a different/ odd shape that restricts it's smooth passage. I hope this helps, thanks.

Radioactive materials can sometimes be used to determine various aspects, such as age, composition, or presence of certain substances.

Radioactive isotopes, through their decay processes, emit radiation that can be detected and measured. This property allows scientists to use them in techniques like radiometric dating, radiography, or tracer studies, which help determine the age of objects, analyze the composition of materials, or track the movement of substances in biological or industrial processes.

The use of radioactive materials in scientific research and applications provides valuable tools for studying and understanding a wide range of phenomena. From archaeological dating to medical imaging, radioactive materials have proven to be versatile and essential in numerous fields, enabling us to gain insights into the natural world and improve various aspects of human life.

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