at a particular temperature, an equilibrium system has only value for keg- T/F

It will take 185.7 years for 99% of the strontium  - 90 in a rock specimen to decay completely.

Given the half- life of the strontium-90 rock = (t1/2)

                                                                          = 28 years

Since the given reaction follows first-order kinetics, the rate constant (k) will be given by k = ln(2)/(t1/2).

  t1/2 = half life of strontium-90  

         = 28 years

  k = ln(2)/28  ≅ 0.0248.

   Q(T) = \(Q_{0}\) \(e^{kt}\)

   Q(T) =  \(Q_{0}\) \(e^{-0.0248t}\)                                                    [Q(T) = \(Q_{0}\) /100 ]

   (1/100) \(Q_{0}\)  = \(Q_{0}\)  \(e^{-0.0248t}\)

for    

Divide both sides by \(Q_{0}\)  to get

(1/100)=  \(e^{-0.0248t}\)

Take the natural log of   both sides to get 

ln (1/100)= −0.0248 

Divide both sides by −0.0248  to    get

    =    ln (1/100)/ (−0.0248)   ≅  185.7  Years

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When a nickel(II) sulfate solution is placed in water, it forms a homogeneous solution.

Nickel(II) sulfate is a soluble salt that readily dissolves in water due to its ionic nature. In water, the nickel(II) ions (Ni²⁺) and sulfate ions (SO₄²⁻) become hydrated, forming an aqueous solution of nickel(II) sulfate.

The solution will appear clear and colorless, as nickel(II) sulfate does not have a distinct color. However, if the nickel(II) sulfate solution is sufficiently concentrated, it may appear slightly blue-green due to the absorption of light by the nickel ions. This is known as a "ligand field color" and is due to the electronic transitions within the nickel complex.

Overall, the addition of nickel(II) sulfate to water will form a homogeneous solution that is clear and colorless, unless the concentration of the solution is high enough to cause a ligand field color.

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The direction of the water between the beaker containing a 25% salt solution and the bag inside with pure water would be from beaker to bag with pure water.

If the beaker had pure water and the bag with salt solution, the water would move from bag to beaker with pure water.

The beaker has salt solution (salt (solute) + water (solvent)). The bag has pure water without any solute. The water normally moves from higher concentration to lower concentration.

Water containing solute would have higher concentration than pure water. Thus, water moves from beaker with higher concentration to bag with lower concentration. The process is called osmosis.

Similarly, if we change the components in beaker and bag, the water would move from bag with higher concentration to beaker with pure water of lower concentration.

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The chemical formula Ab28 does not correspond to a known chemical compound. It is not a recognized formula for any specific substance or compound. It is characterized by its sodium content.

A plagioclase feldspar mineral is albite. It is the plagioclase solid solution series' sodium endmember. It is a plagioclase that contains less than 10% anorthite. The formula for the endmember of pure albite is NaAlSi₃O.

The chemical formula Ab28 does not correspond to a known chemical compound. It is not a recognized formula for any specific substance or compound.

Albite is a mineral and a specific member of the plagioclase feldspar group with the chemical formula NaAlSi₃O₈. It is characterized by its sodium content. If Ab28 is intended to represent a variation or modification of albite, it would require additional details or specifications to understand the specific differences between them.

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Answer:

The water will be boiling

Explanation:

When water reaches 100⁰C the water will be boiling.

1 L of the acid solution contains 142.85 mg of CaCO3.

Given, mass of H2SO4 = 140 mg / L

The molecular weight of H2SO4 = 98g / mol

Molarity = mass of H2SO4 / molecular weight of H2SO4 = 140/98 = 1.4285

Normality = Molarity x n factor n factor for H2SO4 = 2Molarity = 1.4285

Normality = 2 x 1.4285 = 2.857 mg / mL1 mol of H2SO4 = 98 g

Hence, 1 ml of H2SO4 = 98/1000 = 0.098gCaCO3 has a molecular weight of 100 g. Therefore, 1 mole of CaCO3 has a mass of 100 g. According to this, 1 mole of CaCO3 reacts with 2 moles of H2SO4.

The normality of the acid is 2.857.

Hence, 1 L of the acid will have 2.857 moles of H2SO4.To calculate the concentration in mg/L of the acid in terms of CaCO3, we need to first find the number of moles of CaCO3 that can be reacted with 2.857 moles of H2SO4.2 moles of H2SO4 react with 1 mole of CaCO3.Therefore, 2.857 moles of H2SO4 will react with:

1 mole of CaCO3/2 moles of H2SO4 = 1.4285 moles of CaCO3In 1 L of the acid, there are 1.4285 moles of CaCO3.The mass of 1.4285 moles of CaCO3 = 1.4285 x 100 = 142.85 g / L

Therefore, 1 L of the acid solution contains 142.85 mg of CaCO3.

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The maximum mass of sodium bromide that can be produced in this reaction is 4.05 g. So, the correct answer is option C.

This is because the limiting reagent, or the reagent with the least amount, is the hydrobromic acid, which has a mass of 4.05 g.

HBr + NaOH →  NaBr + H2O is the reaction equation for this reaction. The total mass of the products and reactants must be equal in order for the rule of conservation of mass to apply.

Since hydrobromic acid has a mass of 4.05 g, the maximum mass of sodium bromide that can be produced is the same.

This quantity of sodium bromide is created when both reactants are used up entirely in the reaction and none are left behind.

Complete Question:

A aqueous hydrobromic  acid (HBr) will react with solid sodium hydroxide (NaOH) to produce aqueous sodium bromide (NaBr) and liquid water (H2O). If 4.05 g of hydrobromic acid is mixed with 3.7 g of sodium hydroxide, what is the maximum mass of sodium bromide that could be produced by the chemical reaction?

A. 2.75 g

B. 3.7 g

C. 4.05 g

D. 4.75 g

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Answer: 40 grams of calcium will form in the reaction.

Explanation:

The balanced chemical equation for the reaction between sodium and calcium nitrate is:

2 Na + Ca(NO3)2 → 2 NaNO3 + Ca

This means that for every 2 moles of sodium that react, 1 mole of calcium is produced.

To determine the amount of calcium produced from 46 grams of sodium, we first need to convert the mass of sodium to moles using its molar mass:

46 g Na x (1 mole Na / 23 g Na) = 2 moles Na

Since there is excess calcium nitrate, all 2 moles of sodium will react completely and produce 1 mole of calcium. The mass of calcium can be calculated using its molar mass:

1 mole Ca x 40 g Ca / 1 mole Ca = 40 g Ca

Therefore, 40 grams of calcium will form in the reaction.

The main minerals that may contribute to hypertension when consumed in excess include sodium, potassium, and calcium.

Eating too much of certain minerals can lead to hypertension, a condition that can cause high blood pressure.

Too much sodium can cause the body to retain water, leading to increased blood pressure.

Potassium can also affect blood pressure, as it influences the amount of sodium in the body.

Calcium is important for regulating the contraction and relaxation of muscles, including those of the heart. When calcium levels become too high or excess, it may lead to hypertension.

Therefore, it is important to keep an eye on your mineral intake to ensure that it remains within healthy limits.

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Answer:

P

Explanation:

Information about various chemical compounds and elements. ... P. 2.19. S. 2.58. Cl. 3.16. Ar. n.a.. 4. K. 0.82. Ca. 1.00. Sc. 1.36. Ti. 1.54. V. 1.63. Cr. 1.66. Mn. 1.55. Fe. 1.83. Co. 1.88. Ni. 1.91. Cu. 1.90. Zn. 1.65. Ga. 1.81 ... electronegativity scale, although in the Allred-Rochow scale, helium has the highest electronegativity.

Answer:

gaseous state

Explanation:

may be because it is result of endothermic process (evaporation

Bromine in the gaseous state has the most thermal energy because as the temperature increases, thermal energy also increases.

Thermal energy is the energy which is created in a molecule as a result of it getting heated up which leads to rise in temperature. As the temperature  rises, there is more motion of molecules in a substance.

In solids , as the molecules are compactly packed the motion is less and hence it has least thermal energy while gas molecules are far apart the motion is maximum and hence thermal energy is highest in gases . The thermal energy of liquids is intermediate of those of gases and solids.

As the temperature increases, thermal energy increases which facilitates conversion of states of matter.

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Answer:

A. 1,4-dimethylbenzene

Explanation:

The compound CH,CH;CH,CH3 is a benzene derivative with two methyl groups attached to the benzene ring. The positions of the methyl groups on the ring are indicated by the numbers 1 and 4, which correspond to the carbon atoms at the end of the two double bonds in the benzene ring. This compound is therefore 1,4-dimethylbenzene. The other options listed are not correct because they contain the wrong number or type of substituents on the benzene ring.

13.5 grams of aluminum reacts with 32.0 grams of oxygen. 61.1 g is the mass of aluminum oxide .

A body's mass is an inherent quality. Prior to the discovery of both the atom as well as particle physics, it was widely considered to be tied to the amount of matter inside a physical body.

It was discovered that, despite having the same quantity of matter in theory, various atoms and elementary particles had varied masses.

4Al + 3O\(_2\) →2 Al\(_2\)O\(_3\)

moles of oxygen = 32/32= 1 moles

the mole ratio between Al\(_2\)O\(_3\) and oxygen is 2:3

1 mole of O\(_2\)  will produce 2/3= 0.6moles of Al\(_2\)O\(_3\)

mass of Al\(_2\)O\(_3\) =0.6×101.9

                      =61.1 g

Therefore, 61.1 g is the mass of aluminum oxide .

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An equilibrium between AgCl(s) and its dissolved ions occurs when the aqueous solution is saturated.

In a saturated solution, the maximum amount of solute, in this case AgCl, has dissolved in the solvent at a given temperature, and no more solute can dissolve. This results in a dynamic equilibrium where the rate of dissolution of AgCl(s) equals the rate of precipitation of AgCl(s). The concentrations of the dissolved ions (Ag+ and Cl-) remain constant, and the solution is neither supersaturated nor unsaturated.
In an unsaturated solution, the amount of dissolved solute is less than the maximum that the solvent can dissolve. In this case, the AgCl(s) will continue to dissolve until the solution becomes saturated. On the other hand, a supersaturated solution contains more solute than the solvent can typically dissolve at a given temperature. This occurs when the solution is prepared at a higher temperature and then cooled. Supersaturated solutions are unstable and can lead to the precipitation of excess solute, eventually reaching the saturated state and establishing equilibrium between the solid AgCl and its dissolved ions.

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The 2 processes in which the particles will lose or gain energy are:

1) Temperature Change Or

2) State Change

A particle losses or gains energy when its Temperature changes i.e. A vessel filled with boiling water (100 degrees C ) cools down at the room temperature OR

when its State changes i.e. A bucket full of ice is kept at a room temperature (state changes from Solid to Liquid)

It is because of the breaking or formation of bonds, which results in loss or gain in energy.

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The percent composition of phosphorus in magnesium phosphate is approximately 32.3%.

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Answer:

The percentage yield is 80.36% (see calculations in attachment).

Explanation:

The theoretical  yield of the reaction is the amount of product that would result if all the  limiting reagent reacted. The theoretical yield is calculated using the balanced equation.

In practice, the actual yield, or the amount of  product actually obtained from a reaction, is almost always less than the theoretical  yield.

To determine how efficient this reaction is, we need to calculate the percent  yield, which describes the proportion of the actual yield to the theoretical yield. It is  calculated as follows:

\( %yield = actual yield ÷ theoretical yield × 100% \)

First we need to make sure that the equation is properly balanced. In the question they provide the balanced equation.

Since water is in excess, we calculate the theoretical yield using PCl₃.

Answer:

Explained below.

Explanation:

Mixtures are basically substances which are formed by physically mixing two or more substances.

Compounds are substances which are formed by chemically combining two or more elements.

The sugar-water in the glaze is a mixture because it was formed by physically mixing sugar and water without any chemical combination.

The way Nicole can test to make sure she is using the sugar-water in the glaze is that the sugar and water can be visibly seen in the glaze whereas for the compound, it forms a new substance and as such the physical elements used to mix can't be identified.

Enantiomers are pairs of compounds with exactly the same connectivity but opposite three-dimensional shapes.

What is a enantiomer?

In chemistry, an enantiomer (also called an optical isomer, enantiomer, or optical antipode) is one of two stereoisomers that are not superimposable on their own mirror image. Enantiomers are similar to the right and left hands and cannot be superimposed when looking at the same face. No amount of reorientation will align the four unique groups (see Chirality (Chemistry)) on the chiral carbons exactly. The number of stereoisomers a molecule has can be determined by the number of chiral carbons it has. Stereoisomers include both enantiomers and diastereomers.

Like enantiomers, diastereomers have the same molecular formula and are not superimposable, but they are not mirror images of each other.

Therefore, Enantiomers are pairs of compounds with exactly the same connectivity but opposite three-dimensional shapes.

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The limiting reactant is oxygen.

To determine the limiting reactant, we need to compare the amount of product that each reactant can produce.

The balanced chemical equation for the combustion of ethene (C2H4) with oxygen (O2) is:

C2H4 + 3O2 → 2CO2 + 2H2O

From the equation, we can see that 1 mole of ethene reacts with 3 moles of oxygen to produce 2 moles of carbon dioxide and 2 moles of water.

Let's first calculate the number of moles of each reactant:

Number of moles of C2H4 = 34.1 g / (28.05 g/mol) = 1.215 moles

Number of moles of O2 = 28.8 g / (32 g/mol) = 0.9 moles

Next, we need to determine which reactant is limiting. To do this, we compare the moles of each reactant to the stoichiometric ratio in the balanced chemical equation.

For ethene:

1.215 moles C2H4 x (3 moles O2 / 1 mole C2H4) = 3.645 moles O2 required

For oxygen:

0.9 moles O2 x (1 mole C2H4 / 3 moles O2) = 0.3 moles C2H4 required

We can see that the amount of oxygen available (0.9 moles) is less than the amount required (3.645 moles) according to the stoichiometric ratio. Therefore, oxygen is the limiting reactant.

In conclusion, the limiting reactant is oxygen.

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Answer:

SnO2

Explanation:

The limiting reactant is the reactant that runs out first during a chemical reaction.

Reactants are on the left side of the reaction, so SnO2 and H2. They tell us in the question that there is "excess" hydrogen (H2), so we know there is plenty of it, as "excess" means "more than enough." If we have more than enough hydrogen, then we know that we will run out of SnO2 first.

:)

Answer:SnO2

Explanation:

Given data:H2O vapor content: 13 gramsH2O vapor capacity: 52 grams at 25 degrees Celsius 13 grams at 10∘C52 grams at 30∘CFormula used to find the dew point:$$\dfrac{13}{52}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$\frac{1}{4}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$

Where A is the constantDew Point:It is the temperature at which air becomes saturated with water vapor when the temperature drops to a point where dew, frost or ice forms. To solve this question, substitute the given data into the formula.$$13/52=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$13(17.27-A)=3\pi A(ln100)$$By simplifying the above expression, we get$$A^2-17.27A+64.78=0$$Using the quadratic formula, we get$$A=9.9,7.4$$

The dew point is 7.4 since it is less than 10°C.More than 100:The term "More than 100" has not been used in the question provided.

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Answer:

1.02 10 to the 23 power(or 100,000,000,000,000,000,000,000)

atoms of AL

Explanation:

ive had this question before

The chemical breakdown of glucose to produce energy is an example of cellular respiration.

This process occurs in the mitochondria of cells and involves the breakdown of glucose into carbon dioxide and water, releasing energy that is used by the cell. This energy is in the form of ATP, which is the primary energy source for cellular activities. The breakdown of glucose occurs through a series of metabolic pathways that involve enzymes and various molecules, including oxygen. The overall reaction of cellular respiration can be summarized as glucose + oxygen → carbon dioxide + water + energy. This process is essential for the survival and functioning of cells and organisms, as it provides the energy needed for various activities such as movement, growth, and metabolism.

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The molar enthalpy of decomposition for \(CaCO_3\) is 166 kJ.

The molar enthalpy of decomposition can be calculated by dividing the amount of energy by the number of moles of \(CaCO_3\).

Let's find the number of moles first.

Number of moles of \(CaCO_3\)

m = mass / molar mass

m = 93.5 g / (40.08 g/mol + 12.01 g/mol + 3 × 16.00 g/mol)

m = 93.5 g / 100.09 g/mol

m = 0.934 mol

The molar enthalpy of decomposition can be calculated using the formula:

Molar enthalpy of decomposition = Energy change / Number of moles

Molar enthalpy of decomposition = 166 kJ / 0.934 mol

The molar enthalpy of decomposition = 177.65 kJ/mol

Therefore, the molar enthalpy of the decomposition of \(CaCO_3\) is 177.65 kJ/mol.

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0.43 g/L is the concentration of albumin.

The volume of solution:

0.20 mL (volume of solute) + 2.58 ml (volume of solvent) = 2.78 mL (volume of solution)

The calculation for mass:

0.20 mL. 1 L/1000mL = 0.0002 L

We use the concentration to determine

Mass = \(0.0002L.6g/L=0.0012g\)  of albumin.

The calculation for concentration:

Concentration (g/L) = \(0.0012g/0.00278L=0.43g/L\)

Thus, the concentration of albumin is  0.43 g/L.

Concentration in chemistry is calculated by dividing a constituent's abundance by the total volume of a mixture. There are various categories of mathematical description, including mass concentration, molar concentration, number concentration, and volume concentration. Although solutes and solvents in solutions are usually mentioned, the concentration can relate to any form of a chemical mixture. There are different types of molar (quantity) concentrations, including normal concentration and osmotic concentration.

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The compounds that are not sp3d hybridized at the central atom are i. BF₃ and iii. SF₄.

In sp3d hybridization, the central atom adopts a trigonal bipyramidal geometry, with five electron domains (either bonding or lone pairs) arranged around it. However, both BF₃ and SF₄ do not have this arrangement.

i. BF₃: Boron (B) in BF₃ has only three electron domains, forming three sigma bonds with three fluorine (F) atoms. It does not have any lone pairs, so it does not require d orbitals for hybridization. Therefore, BF₃ is not sp3d hybridized.

iii. SF₄: Sulfur (S) in SF₄ has four electron domains, forming four sigma bonds with four fluorine (F) atoms. It also has one lone pair of electrons. With only four electron domains, SF₄ does not require d orbitals for hybridization. Therefore, SF₄ is not sp3d hybridized.

On the other hand, the compounds AsI₅, BrF₅, and XeF₄ have five electron domains around the central atom, requiring d orbitals for hybridization and exhibiting sp3d hybridization.

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Answer: If a pinch of mercury is consumed you will die from it so using a mercury thermometer is very unsafe if its breaks and a child consumes that mercury.

Explanation:

Don't use one

If the glass breaks and the mercury is not properly cleaned up, the little silvery ball within a mercury thermometer might be hazardous. As the mercury evaporates, it may pollute the air around and turn dangerous to both people and animals.

Children that have been exposed to mercury have lower IQs, hearing impairments, and worse coordination.

Long-term exposure worsens and exacerbates symptoms, which may lead to personality changes or even coma.

Mercury thermometers can be replaced by a number of things:

These non-mercury fever thermometers are significantly safer and equally accurate as mercury thermometers.

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The relationship between temperature and vapor pressure for water (H2O) can be described by an exponential function.

When we examine the given temperature-vapor pressure data for water, we can observe that as the temperature increases, the vapor pressure of water also increases. This relationship is consistent with the behavior of most liquids, where higher temperatures lead to increased vaporization and higher vapor pressures.

To analyze the relationship more precisely, we can plot the data points on a graph with temperature on the x-axis and vapor pressure on the y-axis. When we connect the points, we can see that the resulting curve resembles an exponential growth pattern. As the temperature increases, the vapor pressure rises at an accelerating rate.

This exponential relationship can be described using mathematical models such as the Clausius-Clapeyron equation or the Antoine equation, which provide more accurate representations of the vapor pressure-temperature relationship for various substances.

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Answer: A 5 M sample of hydrogen peroxide decomposes more rapidly than a 2M sample of the same volume, and Calcium carbonate deteriorates more rapidly in polluted air than in clean air

Explanation: