How many grams of silver nitrate will be needed to produce 8.6 g of silver?

The crystalline structure of quartz is due to b. the internal arrangement of atoms within the crystal.

When conditions permit, many minerals form crystals with elaborate geometric patterns. The crystalline structure of quartz is due to

The crystalline structure of quartz is due to b. the internal arrangement of atoms within the crystal.

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Answer:

I'm not sure what each value represent (mass, volume, or density).  Just use the relationship Density = mass/volume and you can calculate the missing values.

Explanation:

Examples (assuming the values are identified correctly):

Answer:

Lanthanum and Lutetium

I hope this will help you

The pH after the addition of 29.5 mL of NaOH to a 0.242 M solution of formic acid is 3.52.  

The pH after the addition of 29.5 mL of NaOH to a 0.242 M solution of formic acid, we can use the following equation:

pH = -log[H+]

here [H+] is the concentration of hydronium ions (H3O+).

The concentration of hydronium ions can be calculated using the equation:

[H+] = [HCHO] x [NaOH] / [HCHO] + [NaOH]

here [HCHO] is the concentration of formic acid, [NaOH] is the concentration of NaOH, and [H+] is the concentration of hydronium ions.

Using the given concentrations and the equation for [H+], we can calculate the pH as follows:

pH = -log[H+]

= -log[HCHO] x [NaOH] / [HCHO] + [NaOH]

= -1.76 x 0.242 / 0.242 + 1.76 x 0.242

= -1.76 + 1.76

= 3.52

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Answer:

I would go with C

Explanation:

Because if in a group of scientists, the people that are educated with different experiences will be helpful to invent a new thing by giving their own ideas and mixing them.

Hope i got to be Helpful!

So this is asking how they can stop the carp from spreading. A. is talking about the asian carps jumping out of water damage boats but this has nothing to do with what we can do to stop them from spreading!! B. Is saying how when you release the carp into a body of water can cause them to spread even more! so that isnt what we need. C. Is about how plants provide safe places for carps to have more carps and that's what we are trying to stop D. This is saying that we can throw bait we dont want in the trash not the water so when somebody catches an asian carp people know and can not release any more fish to the body of water .

D. - Makes the most sense because it talks about what people can do to stop the spread of the invasive species The Asian Carps

Adding a catalyst to a chemical system has some certain effects including increased reaction rates, reaction quotient is unaffected.

A catalyst is an element or compound that speeds up the rate of a chemical reaction by lowering the activation energy barrier. The catalyst provides an alternative mechanism with a smaller activation energy that is followed by the reactants. As a result, adding a catalyst to a chemical system increases the reaction rate.

The reaction quotient is unaffected: When a catalyst is added to a chemical system, the reaction quotient is not affected because it does not change the composition of the equilibrium mixture. Therefore, adding a catalyst to a chemical system does not have an effect on the reaction quotient.

Therefore, the correct options are A and B.

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Answer:

Force of gravity,

Weak nuclear force

close,

Strong nuclear force

done,

Electrostatic force is the correct answer

Sorry I'm a bit late, but hopefully this helps someone else :)

Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore, correct option is option B that is CHCl\(_3\).  Ideal gas is a hypothetical gas.

Ideal gas equation is the mathematical expression that relates pressure volume and temperature. There is no force of attraction between the particles.

Mathematically the relation between Pressure, volume and temperature can be given as

PV=nRT

where,

P = pressure of gas sample = 850 torr=1.11atm

V= volume of gas sample =0.918 L

n =number of moles of gas sample=?

T =temperature of gas =308K

R = Gas constant = 0.0821 L.atm/K.mol

Substituting all the given values, we get

1.11atm×0.918 L =n× 0.0821×308

On calculation we get

1.018=n×25.28

n=0.04moles

Molar mass =mass/moles

Molar mass = 4.84 g/0.04

                   =119. 4g/mol

Therefore, correct option is option B.

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Answer:

I think it's C I think that's the answer

A: Negatively charged ions

B: Hydrophollic molecules

Facilitated diffusion is the spontaneous passive transport of molecules across the biological membrane through the help of a membrane protein. This type of diffusion occurs in the molecules that cannot cross the membrane freely and requires a molecule to enter and leave the membrane.

Negatively charged ions and hydrophobic molecules require facilitated diffusion.

Therefore, option A and B are correct.

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This problem is providing the initial volume and pressure of a gas as 675 mL and 1.5 atm and then mentions the final volume as 345 mL and asks for the new pressure of the gas.

Thus, we start off this problem by recalling the concept of Boyle's law as an inversely proportional relationship between pressure and volume:

\(P_1V_1=P_2V_2\)

In which we solve for the final pressure, \(P_2\) as shown below:

\(P_2=\frac{P_1V_1}{V_2} \\\\\\P_2=\frac{675mL*1.5atm}{345mL} \\\\\\P_2=2.93atm\)

Considering we had to cancel out the milliliters to obtain atm as units of pressure.

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The phospholipids in cell membranes, which are made up of unsaturated fatty acids, support membrane fluidity.

The fatty acid tails of phospholipids are made thicker and more difficult to assemble tightly together by unsaturated fatty acids. So, the phopholipids are spaced farther apart by the tails of unsaturated fatty acids. This makes membrane fluidity greater.

Less fluid membranes contain lipids with longer fatty acid tails than do membranes with shorter fatty acid tails. This is due to the fact that lipids with longer fatty acid tails have more surface area available for surface interaction.

Fats that are unsaturated are more likely to oxidise. The more brittle double bonds, which permit more oxygen to react at those locations, are to blame for this.

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The percent concentration of the solution containing 90 grams of NaOH in 750 mL of buffer is 300%.

Mass of NaOH = 90 grams

Molecular weight of NaOH = 40 g/mol

The volume of buffer solution = 750 mL

Converting the volume to litres -

= 750 mL

= 750/1000

= 0.75 L

Calculating the number of moles of NaOH -

= Mass / Molecular weight

= 90  / 40

= 2.25 mol

Calculating the percent concentration -

= (Amount of solute / Total solution volume) x 100

= (2.25 / 0.75 ) x 100

= 3 x 100

= 300

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The gaseous element that comprises the greatest percentage of the air we breathe is nitrogen (N2).

Nitrogen makes up approximately 78% of the Earth's atmosphere, making it the most abundant gas. Oxygen (O2) is the second most abundant gas, constituting around 21% of the air we breathe. Other gases such as argon, carbon dioxide, neon, helium, and methane make up the remaining small fraction of the atmosphere. The high concentration of nitrogen in the air is essential for sustaining life as it plays a crucial role in various biological processes and is involved in the composition of important molecules like proteins and nucleic acids.

Explanation: The Earth's atmosphere is primarily composed of nitrogen and oxygen. Nitrogen gas (N2) comprises approximately 78% of the atmosphere, making it the most abundant gas. Oxygen gas (O2) is the second most abundant, accounting for around 21% of the air. Nitrogen is a non-reactive gas, meaning it is relatively inert and does not readily undergo chemical reactions. Its high concentration in the air is important for maintaining the stability and composition of the atmosphere. Oxygen, on the other hand, is essential for the respiration of most organisms, including humans. It supports the combustion of fuels and is vital for sustaining aerobic life. While other gases like argon, carbon dioxide, neon, helium, and methane exist in trace amounts in the atmosphere, it is nitrogen that comprises the largest percentage of the air we breathe.

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Answer:

I THINK ITS FALSE

Explanation:

please mark me as brainliest

The percent yield based on the data and calculation is 88.8%. This indicates that the reaction did not proceed with 100% efficiency and that some of the reactants did not convert to product.

Given:

Find:

The percent yield = ?

Formula:

\(\bf Pecent~yield = \dfrac{Actual~yield}{Theoritical~yield}\times 100\%\)

Therefore:

Conclusion:

The percent yield is 88.8%.

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Explanation:

simply multiply value by 100

5450cm²

Answer:

because when it burns reacts with oxygen forming mg oxide

Answer: Water is polar and salts form ions in solution.

Explanation:

According to the concept of “Like dissolves like”, the polar solutes dissolve in polar solvents, and non-polar solutes dissolve in non-polar solvents.

Water being a polar solvent due to large electronegativity difference between hydrogen and oxygen is able to interact with the ions of the solute.

As water molecules are also polar in nature. So, oppositely charged ions interact with each other and dissolve in it.

Water can form hydrogen bonds with most of the substances and hence dissolve them . Thus water is considered as a universal solvent.

Answer: Water is polar, and salts form ions in solution

Explanation: Took MYA

Answer:

D.No answer text provide.

Explanation:

The energy that is possessed by an object due to it's motion or due to it's position is mechainical energy

Answer:

Circum-Pacific Belt

It's a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes. Most earthquakes and volcanoes are formed and happen along the path.

Amides are not strongly acidic or basic, but rather amphoteric, meaning they can act as both an acid and a base. (None of the above)

This is due to the presence of a lone pair of electrons on the nitrogen atom and the presence of a carbonyl group. In acidic conditions, the amide can donate a proton from the nitrogen, making it act as a base. In basic conditions, the carbonyl group can accept a proton, making the amide act as an acid. However, the amphoteric nature of amides is relatively weak, and they are typically considered to be neutral compounds.

However, they are not considered strongly basic, acidic, or amphoteric. Therefore, the correct answer to your question is "none of the above." Amides are less basic than amines due to the resonance stabilization provided by the carbonyl group, which reduces the electron density on the nitrogen atom.

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Answer:

here's your answer...

Explanation:

Full moon, also hey lol.

have a germ-free day.

Based on the values of bond energies given, the reaction is endothermic and absorbs 20 kJ of heat when 2 moles of acetylene reacts.

The equation of the combustion of acetylene sis given below:

2 C2H2 + 5 O2 -----> 4 CO2 + 2 H2O

Sum of ΔH bonds broken:

2 × C≡C + 2(2 × C—H) = 2 × 839 + 4 × 413 = 3330 kJ

5 × (2 × O = O) = 10 × 495 = 4950 kJ

Sum of ΔH bonds broken = 8280 kJ

Sum of ΔH of bonds formed:

Energy of C=O is 799 kJ

4 × 2 × C=O = 8 × 799 = 6392 kJ

Energy of H-O bond is 467kJ

2 × 2 × H-O = 2 × 2 × 467 = 1868 kJ

Sum of ΔH of bonds formed = 8260 kJ

Heat change, ΔH = 8280 -8260 kJ

Heat change, ΔH = 20 kJ

Therefore, based on the bond energies given, the reaction is endothermic and absorbs 20 kJ of heat when 2 moles of acetylene reacts.

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Levi's is taking precautions to prevent potentially hazardous chemicals from its supply chain.

Levi Strauss & Co. and Hohenstein established a cooperation to use the Eco Passport by Oeko-Tex certification system to control chemical safety in the denim brand's supply chain.

The firms believe that the cooperation will expand the capabilities of Levi Strauss' Screened Chemistry initiative and assist to build a more straightforward path toward safer chemistry in the garment sector by offering greater levels of testing, verification, and transparency for chemical safety.

Levi Strauss and Hohenstein both said that they approach chemical management with the belief that safer inputs lead to safer outputs. Screened Chemistry is an open-source tool developed by Levi Strauss that evaluates chemical compositions to avoid potentially harmful substances from entering the garment supply chain and to suggest safer alternatives.

Levi Strauss has devised a more comprehensive approach to guaranteeing safe and ethical chemical management by assessing new chemistries that are not yet covered by Manufacturing Restricted Substances Lists.

Oeko-Tex Eco Passport is an impartial certification scheme for chemicals used in the garment, textile, and leather sectors. It determines if each constituent in a chemical product complies with international legal criteria and is not hazardous to human health. On-site inspections can corroborate claims that suppliers use safer and better chemistry that is made in accordance with industry standards.

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Answer: seawater at pH 8 has the greatest concentration of hydroxyl ions[OH-].Thus, option (c) is the correct answer.

Explanation:

When the pH value increases from 7 to 14,it represents increase in the OH- ion concentration.pH scale determines the acidity or basicity of the solution.The value below 7 represents that solution is acidic and above 7 represents that solutions is basic.

The pH of pure water at room temperature is 7.It means it is neither acidic nor basic,it is neutral.The pH value of Battery Acid is 0 which means it is highly acidic.The pH value of Liquid drain cleaner is 14 which means it is highly basic.

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The average atomic weight of silicon to be approximately 28.0855 amu, rounded to four significant figures.

To calculate the average atomic weight of silicon, we consider the natural abundance of each isotope and its corresponding atomic weight. By multiplying the abundance of each isotope by its atomic weight and summing up the values, we can obtain the average atomic weight of silicon.

We have three isotopes of silicon with their respective abundances and atomic weights:

Si-28 with 92.23% abundance and an atomic weight of 27.9769 amu.

Si-29 with 4.68% abundance and an atomic weight of 28.9765 amu.

Si-30 with 3.09% abundance and an atomic weight of 29.9738 amu.

To calculate the average atomic weight, we multiply the abundance of each isotope by its atomic weight and sum up the values:

Average atomic weight = (abundance of Si-28 * atomic weight of Si-28) + (abundance of Si-29 * atomic weight of Si-29) + (abundance of Si-30 * atomic weight of Si-30)

= (0.9223 * 27.9769) + (0.0468 * 28.9765) + (0.0309 * 29.9738)

Calculating this expression, we find the average atomic weight of silicon to be approximately 28.0855 amu, rounded to four significant figures.

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The answer is b. iron.

Oxidation state or number refers to the number of electrons that an atom has lost, gained, or shared in forming a chemical compound. It is an indication of the degree of oxidation of an atom in a molecule. Elements can have one or more oxidation states.

Iron (Fe) is a transition metal and is located in the middle of the periodic table. Transition metals are known to have multiple oxidation states due to their partially filled d orbitals. Iron has two common oxidation states: +2 and +3. It can also exhibit other oxidation states, such as +4 and +6, but these are less common.

Cadmium (Cd), silver (Ag), and zinc (Zn) are not transition metals and are located in the s-block or p-block of the periodic table. These elements have only one common oxidation state: +2 for Cd and Zn, and +1 for Ag.

Therefore, the correct answer is b. iron, which has more than one positive oxidation state.

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Answer:

26.98°C

Explanation:

Applying,

Q = cm(t₂-t₁)................ Equation 1

Where Q = Heat transferred to the soil, c = specific heat capacity of dry soil, m = mass of the soil, t₂ = final temperature, t₁ = initial temperature.

From the question,

Given: Q = 11 kJ = 11000 J, m = 2300 g = 2.3 kg, t₁ = 21°C

Constant: c = 800 J/kg.°C

Substitute these values into equation 1

11000 = 800×2.3(t₂-21)

Solving for t₂

t₂-21 = 11000/(800×2.3)

t₂-21 = 11000/1840

t₂-21 = 5.98

t₂ = 5.98+21

t₂ = 26.98°C