If 25.8 mL of an AgNO3 solution is needed to precipitate all Cl- ions in a 1570 mg of KCl (forming AgCl), what is the molarity of the AgNO3nsolution?

I would have to say the answer is smokeless fuels

Answer:

fossil fuels form in sedimentary rocks when increased heat and pressure applies to fossils.

Explanation:

fossil fuels are made when sedimentary rock gets heat and pressure increased.

Answer:

Bathypelagic

54% of the ocean lies in the Bathypelagic (aphotic) zone into which no light penetrates. This is also called the midnight zone and the deep ocean. Due to the complete lack of sunlight, photosynthesis cannot occur and the only light source is bioluminescence.

Explanation:

The small surface zone that has light is the photic zone. The entire rest of the ocean does not have light and is the aphotic zone.

Permanent darkness below 1000 meters with bioluminescent bacteria, bottom feeders, and angler fish is where no light reaches.

This is referred to the state of being dark as a result of absence of light in the area.

The light ray penetration decreases with increase in depth thereby making areas below 1000 meters dark with bioluminescent bacteria, bottom feeders, and angler fish which is why option C was chosen.

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The half-life of radon-222 is 4 days, which means that after each 4-day period, the amount of radon-222 in a sample is halved.

After 8 days, only 25 g of the 100 g sample of radon-222 would be remaining. After 8 days, there have been two half-life periods. Therefore, we can find the amount of radon-222 remaining after 8 days using the following formula:

Amount remaining = (Initial amount) x (1/2)^(number of half-life periods)

Initial amount = 100 g

Number of half-life periods = 8 days / 4 days per half-life = 2 half-life periods

Substituting these values into the formula gives:

Amount remaining = 100 g x (1/2)² = 100 g x (1/4) = 25 g

Therefore, after 8 days, only 25 g of the 100 g sample of radon-222 would be remaining.

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Answer:

58.44277 gram

Explanation:

The molar mass is 3230.8 g/mol

First, we need to know that the formula for the general gas law  is represented as;

PV = nRT

such that the parameters are;

Substitute the values

1 × 2.33 = n × 8.314 × 433.15

Multiply the values, we get;

n = 2.33/ 8.314 × 433.15

Divide the values

n = 6.5 × 10⁻⁴ moles

But, number of moles = mass/molar mass

Molar mass = 2.10/ 6.5 × 10⁻⁴

Molar mass = 3230.8 g/mol

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The reaction is endothermic since the energy level of the products have are higher than that of the reactants.

The activation energy (AE) is the energy difference between the reactants and the transition state.

The change in energy E and the energy difference between the reactants and the products

The data given is as follows:

Reactants: 0 kJ/mol

AE forward 125 kJ/mol

AE reverse: 86 kJ/mol

Products: 39 kJ/mol

The values of ΔE forward and ΔE reverse are as follows:

ΔE forward = (39 - 0) kJ/mol

ΔE forward = +39 kJ/mol

ΔE reverse = (0 - 39) kJ/mol

ΔE reverse =  -39 kJ/mol

3. Given that Ea = 154 kJ/mol and ΔE = 136 kJ/mol

AE reverse = ΔE - AE forward

E = 136 kJ/mol - 154 kJ/mol

E = -18 kJ/mol

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The general form of a neutralization reaction is HF + FrOH → FrF + H₂O

We refer to this as a neutralisation reaction. Only this reaction, which produces NaCl and water as products, is a neutralisation reaction since it involves HCl and NaOH. The resulting response is listed below: NaCl(aq) + H₂O = HCl(aq) + NaOH(aq) (l)

The interaction of H⁺ ions and OH⁻ ions produces water in a neutralisation reaction, which occurs when an acid and a base combine to make water and a salt. The neutralisation of a strong acid and strong base yields a pH of 7.

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The of life on Earth is defined by gravity. It influences plant and animal growth and development by regulating the proliferation of their cmorphologyonstituent cells1. Gravity is also important in cellular function.

when the prairie dog stopped in the grass.

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In an enzyme-catalyzed reaction, the rate-limiting step is typically the binding of substrate to the active site of the enzyme. K2 and k-2 represent the rate constants for the formation and breakdown of the enzyme-substrate complex, respectively. These rate constants are important in determining the overall rate of the reaction, but they do not determine the initial velocity, which is largely determined by k1.

Enzyme Catalyzed is the increase in the rate of a process by a biomolecule. Such biomolecules are called enzymes, and most enzymes are proteins, while the processes they accelerate are mostly chemical reactions in the body.

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Answer:

2.3 Work with the numerator first: 165 mg is 0.165 g. ... 2.9 (a) 1 mg Mo 1 10 3 g

Explanation:

im pretty sure this is the answer

The balanced equation for the single replacement reaction between zinc metal (Zn) and sulfuric acid (H2SO4) is: Zn + H2SO4 → ZnSO4 + H2

In the reaction, zinc metal displaces hydrogen from sulfuric acid to form zinc sulfate and release hydrogen gas. The equation is said to be balanced in terms of atoms and charge.

The equation on the left side, is having one zinc atom (Zn) and one molecule of sulfuric acid (H2SO4). The sulfuric acid molecule contains single sulfur atom (S), two hydrogen atoms (H), and four oxygen atoms (O).

The equation on the right side, is having one molecule of zinc sulfate (ZnSO4) and one molecule of hydrogen gas (H2). The zinc sulfate molecule consists of single zinc atom, single sulfur atom, and four oxygen atoms.

Therefore, the equation is balanced because it follows the law of conservation of mass and charge. The same types and same number of atoms are present on both the sides of the equation, That means no atoms are created or destroyed during the reaction.

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Answer:

Explanation:

m= 80.0 g

Cp=0.8 J/gc

Change in T= 25

q=Cp X m X T  =0.8 X 80.0 X 25 =1600J

Postive q or enthalpy makes it endothermic.

Answer:

when equal moles of an acid and base are mixed,after reaction the two are compounds are said to be at the Equivalent point.

Answer:

the volume of the gas at conditions of STP = 151.04998 ml

Explanation:

Data given:

V1 = 180 ml

T1 = 35°C or 273.15 + 35 = 308.15 K

P1 = 95.9 KPa

V2  =?

We know that at STP

P2 = 1 atm or 101.3 KPa

T2 = 273.15 K

At STP the pressure is 1 atm and the temperature is 273.15 K

applying Gas Law:

\(\frac{P_1V_1}{T_1} =\frac{P_2V_2}{T_2}\)

putting the values in the equation of Gas Law:

\(V_2=\frac{P_1V_1T_2}{T_1P_2}\)

V_2 =\(\frac{95.9\times180\times273.15}{308.15\times101.3}\)

V2 = 151.04998

therefore, V2 = 151.04998 ml

Answer:

151 mL is the correct answer to the given question .

Explanation:

We know that

\(PV =n RT\)

Where P =pressure ,V=volume and T=Temperature

Given

P=95.9 kPa.

V=\(180 * 10 ^{-3}\)

R=25/3

T=273 + 35 =308k

Putting these value into the equation we get

\(95.9\ * 180\ *\ 10^{-3} \ =\ n * \frac{25}{3} * 308\)

n=\(6.72 * 10^{-3}\)

Now using the equation

\(n= \ \frac{V}{22.4}\)

\(6.72 * 10^{-3} =\frac{V}{22.4}\\ V\ =\ 150.6mL\)

This can be written as  151mL

Answer and Explanation:

V1/n1 = V2/n2

450.0 mL / 0.0184 mol = 200.0 mL / n2

n2 = 8.17X10^-3 mol

moles removed = 0.0184-8.17X10^-3 = 0.0102 mols removed, I think I'm right but I'm not 100% sure..

According to Avogadro's law, 0.008 moles of gas must be removed to shrink balloon to 200 ml.

Avogadro's law is a gas law which states that the total number of atoms or molecules has a direct proportion to the volume occupied by a gas at a constant temperature and pressure.

It is closely related to ideal gas equation as it links temperature, pressure, volume and the amount of substance.It is given as, V∝n,

The straight line graph of volume versus moles is a straight line passing through the origin which implies that zero moles of gas occupy zero volume.

Here, the number of moles is calculated as, V₁/n₁=V₂/n₂

Therefore on substitution, n₂=0.0184×200/450=0.008 moles.

Thus,0.008 moles are required to shrink  the balloon to 200 ml.

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The mass of the solid aluminum that forms are 192.73 grams

To determine the mass of solid aluminum that forms, we need to use stoichiometry and the balanced chemical equation for the reaction between magnesium and aluminum nitrate.

The balanced chemical equation is:

3 Mg + 2 Al(\(NO_{3}\))3 → 3 Mg(\(NO_{3}\))2 + 2 Al

The equation shows that 3 moles of magnesium react with 2 moles of aluminum to produce 2 moles of aluminum nitrate.

To calculate the mass of solid aluminum, we need to know the amount of magnesium used. Given that the volume of the magnesium is 150.0 mL and its density is 1.738 g/cm³, we can calculate the mass of magnesium using the formula:

Mass = Volume × Density

Mass of magnesium = 150.0 mL × 1.738 g/cm³ = 260.7 g

Now, using the molar mass of magnesium (24.31 g/mol) and the molar ratio from the balanced equation, we can determine the moles of magnesium used:

Moles of magnesium = Mass of magnesium / Molar mass of magnesium

= 260.7 g / 24.31 g/mol

= 10.72 mol

According to the stoichiometry of the balanced equation, the ratio of moles of magnesium to moles of aluminum is 3:2. Therefore, the moles of aluminum formed will be:

Moles of aluminum = (2/3) × Moles of magnesium

= (2/3) × 10.72 mol

= 7.15 mol

Finally, we can calculate the mass of solid aluminum using its molar mass (26.98 g/mol):

Mass of aluminum = Moles of aluminum × Molar mass of aluminum

= 7.15 mol × 26.98 g/mol

= 192.73 g

Therefore, the mass of the solid aluminum that forms is approximately 192.73 grams.

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The limiting reactant (or limiting reagent) in a chemical reaction is the reactant that is completely consumed before the other reactants are used up. The amount of product that can be formed in a chemical reaction is limited by the amount of the limiting reactant. The percent yield of a reaction is the ratio of the amount of product that is actually formed to the maximum amount of product that could be formed, expressed as a percentage.

For example, suppose we have a reaction that converts reactant A into product B, and we have a certain amount of reactant A and a certain amount of reactant B. If the reactant A is completely used up before reactant B, then reactant A is the limiting reactant. The maximum amount of product B that can be formed in the reaction is equal to the amount of limiting reactant (in this case, reactant A) that is consumed. If the actual yield of product B is less than this maximum amount, then the percent yield of the reaction will be less than 100%.

To calculate the percent yield of a reaction, we use the following formula:

% yield = (actual yield / theoretical yield) x 100

where the theoretical yield is the m

Among the given options, Option (D) that is O, \(O^2^-,O^2^+\)  will have the same number of protons. Hence option (D) is correct.

A stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron.

In option (D), All the three species (O, \(O^2^-,O^2^+\) ) bears 8 protons but the number of electrons varies.

In any Ion, there will be no change in number of protons among the same atoms but number of electrons varies.

Therefore, Option (D)  has same atoms but different ions.

Hence, it has same number of protons. Thus the correct answer is option (D)

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The change in entropy for the crystallization of 1.25 moles of butane can be calculated using the formula ΔS = ΔH_fusion / T, where ΔS is the change in entropy, ΔH_fusion is the enthalpy of fusion, and T is the temperature in Kelvin.

In the given problem, the enthalpy of fusion of butane is 24.3 kJ/mol. To convert this to J/mol, we multiply it by 1000, resulting in 24,300 J/mol. The melting point of butane is -0.5°C, which is equivalent to 272.65 K.

Using the formula, we can calculate the change in entropy as follows:

ΔS = (24,300 J/mol) / 272.65 K

    ≈ 89.25 J/(mol·K)

Therefore, the change in entropy for the crystallization of 1.25 moles of butane is approximately 89.25 J/(mol·K).

The change in entropy (ΔS) for the crystallization of a substance can be determined using the equation ΔS = ΔH_fusion / T, where ΔH_fusion is the enthalpy of fusion and T is the temperature in Kelvin. In this case, the enthalpy of fusion of butane is given as 24.3 kJ/mol, which is converted to 24,300 J/mol. The melting point of butane is -0.5°C, which is equivalent to 272.65 K.

By substituting the values into the equation, we find that the change in entropy is approximately 89.25 J/(mol·K). This means that for the crystallization of 1.25 moles of butane, the entropy decreases by 89.25 J/(mol·K).

Entropy is a measure of the disorder or randomness of a system. In this case, the crystallization process involves the transition from a disordered liquid state to an ordered solid state, resulting in a decrease in entropy. The magnitude of the entropy change depends on the enthalpy of fusion and the temperature. A higher enthalpy of fusion or a lower temperature leads to a larger change in entropy.

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Answer:

Actually the answer is B Malleability, conductivity

Explanation:

The balanced chemical equation for the reaction is:

2NaOH(aq) + FeCl₂(aq) --> 2NaCl(aq) + Fe(OH)₂(s)

Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.

The reactants are located on the left side while the products are located on the right side.

Reactants —> Products

The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.

Sodium hydroxide => NaOH

Iron (II) chloride => FeCl₂

2NaOH(aq) + FeCl₂(aq) --> 2NaCl(aq) + Fe(OH)₂(s)

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Answer:

2.00 x 10⁶ m

Explanation:

To find the wavelength, you need to use the following equation:

c = λf

In this equation,

-----> c = speed of light (3.00 x 10⁸ m/s)

-----> λ = wavelength (m)

-----> f = frequency (Hz)

To find the wavelength, you can plug the given value and the constant into the equation and solve for "λ".

c = λf                                                       <----- Equation

3.00 x 10⁸ m/s = λ(150 Hz)                    <----- Insert values

2.00 x 10⁶ = λ                                        <----- Divide both sides by 150 Hz

Answer:

because those are the only thermometers that are truly accurate for kelvins

Explanation:

The Kelvin temperature in thermometers is used by scientists because it provides a temperature where zero indicates the complete absence of thermal energy.

All thermometers have a scale on them that we use to find the temperature, known as a temperature scale. Kelvin proposed that the temperature interval from the ice point to the steam point be defined as 100° containing earlier centigrade scales.

Lord Kelvin had given an absolute temperature scale based on the Carnot cycle.  The zero point is 273.15 on Kelvin’s scale below that of the Celsius scale.

On the kelvin scale, Each division is called a Kelvin (K) and is equal to a degree on the Celsius scale. On the Celsius scale, zero degrees is the freezing point of water while on the Kelvin scale the zero point is at absolute zero temperature.

Therefore, 0 K is equal to - 273.15°C, and 0°C is equal to 273.15 kelvins. A mathematical expression that gives the relation between the Celsius and Kelvin scales:

Temperature (K) = Temperature (°C) + 273

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Answer:

The answer is 1.61 × 10²³ atoms

Explanation:

To determine number of atoms, we will use the formula below

Number of atoms = number of moles (n) × avogadro's constant (6.02 x 10²³)

n was not provided, hence we will solve for n

n = mass/ molar mass

molar mass of carbon monoxide, CO (where C is 12 and O is 16) is 12 + 16 = 28

mass was provided in the question as 7.48

n = 7.48/28

n = 0.267

Hence,

number of atoms = 0.267 × 6.02 x 10²³

= 1.61 × 10²³ atoms

The emergency response guidebook would be the best source about identifying and properly handling hazardous materials.

Hazardous material is defined as any substance or cloth that when worried in an coincidence and launched in enough quantities poses a chance to humans's fitness, protection, and/or assets.

Find the safety statistics Sheet (SDS) prepared by the manufacturer to determine whether or not a consumer product is hazmat. The Explosives, gases, and flammable liquids. Flammable solids. The genetically modified organisms and the micro-organisms. Infectious materials.

In figuring out where unsafe substances are discovered for your community, bear in mind the five phases of a risky material's “life”—manufacturing, transportation, garage, use, and disposal.

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Answer: True

Explanation: The farther away from the center or heat.

Answer:

Yes

Explanation:

The equator is the imaginary belt around the earth and it is created and named because the sun mostly shines on that part/line making heat which causes it to be hot.