Phosphorus-32 has a half-life of 14. 0 days. Starting with 8. 00 g of 32P , how many grams will remain after 98. 0 days ?

Answer:

6.1

Explanation:

Because if you get to the large mark it would be 5 but since its not at 5, it would be 6.1 as you can see in my drawing. It aligns perfectly with 6.1.

Answer: D

Explanation:

S + 2 O2 –> SO4

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Answer:

Explanation:

520:2.54=204.7 round to 205 the answer=205 cm=520 inches

The Avogadro's number is the constant number for the number of atoms or molecules represented in 1 mol, this number is equal to 6.022*10^23, to find out how many molecules there are in 6.0 moles we can set up this equation:

6.0 moles of CH4 * 6.022*10^23 molecules / 1 mol of CH4

The answer will be 3.61*10^24 molecules of CH4

The name of the major attractive force that holds this substance together is ionic bonding.

Ionic bonding is a type of chemical bond that occurs when one atom loses electrons to become a positively charged ion, while another atom gains electrons to become a negatively charged ion.

The resulting ions are then held together by the strong electrostatic attraction between the oppositely charged ions, forming an ionic compound. In the solid state, the ions are held tightly in a lattice structure, which makes the substance a poor conductor of electricity.

However, in the melted state, the ions are free to move and can carry an electric charge, making the substance a good conductor of electricity. The high melting point of 1200 K indicates that the ionic bonds in this substance are strong, requiring a large amount of energy to break them and melt the substance.

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The concentration of A decreases and then levels out. Option A

In many chemical reactions, a reactant is consumed as the reaction progresses, leading to a decrease in its concentration over time. The reactant molecules are transformed into products, and as the reaction proceeds, the concentration of the reactant gradually diminishes.

At equilibrium, the concentrations of both reactants and products remain relatively constant over time, although they can coexist.

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A cell containing 97% h₂o is placed into a 90% h₂o  solution. the solution is to the cell and there the size of the cell will shrink .

             Solute + Solvent = Solution

The cell will cremate because the water in the solution will gets released and there the state of equilibrium exists and that can be determined as Hypertonic solution.

A liquid that has a higher concentration of dissolved particles than regular cells and blood do, like salt and other electrolytes. For instance, wounds are soaked in hypertonic liquids.

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The concentration of NAD+ does not change stoichiometrically with the amount of borohydride added.

NAD+ is a coenzyme used in redox reactions and borohydride is a reducing agent. The concentration of NAD+ is dependent on the metabolic needs of the organism and may vary depending on the organism and its environment. The amount of borohydride added is dependent on the particular reaction that is being carried out and the desired product.NAD+ is a coenzyme that is required for the reduction of aldehydes and ketones in a reaction catalysed by alcohol dehydrogenase. The molar amount of borohydride added only affects the rate of reduction and does not directly affect the concentration of NAD+. Therefore, the concentration of NAD+ does not change stoichiometrically with the amount of borohydride added.

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The electron structure of the "i-" ion, which refers to the iodide ion (I-), is identical to the electron structure of the inert gas Xenon (Xe).

The iodide ion has gained one extra electron compared to a neutral iodine atom (I), resulting in a filled valence shell with the same electron configuration as Xenon. The noble gases, including Xenon, have completely filled electron shells, making them stable and unreactive under normal conditions.

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0.135M

The formula for calculating the molarity of a solution is expressed as

Determine the moles of CaCl2

Determine the molarity of the solution

Hence the molarity of the solution is 0.135M

The molarity of the NaOH solution is 0.0754 M. Answer: 0.0754 M.

Molarity can be defined as the number of moles of solute present in per liter of solution. To calculate the molarity of the NaOH solution, we need to use the given information. Given that 35.22 mL of NaOH solution completely neutralizes a solution containing 0.544 g of KHP.We can use the formula for molarity:

Molarity = (mass of solute / molar mass of solute) / volume of solution in L

First, we need to calculate the number of moles of KHP.Number of moles of KHP = mass of KHP / molar mass of KHP

Number of moles of KHP = 0.544 / 204.22 = 0.00266 mol

Now, we can use the balanced chemical equation for the reaction between NaOH and KHP:

NaOH + KHC8H4O4 → KNaC8H4O4 + H2O

From the equation, we can see that one mole of NaOH reacts with one mole of KHP. Therefore, the number of moles of NaOH used in the reaction is also 0.00266 mol.Since the volume of the NaOH solution used is 35.22 mL, we need to convert it into liters.Volume of NaOH solution used = 35.22 mL = 0.03522 L

Now we can calculate the molarity of the NaOH solution:

Molarity = number of moles / volume of solution

Molarity = 0.00266 / 0.03522

Molarity = 0.0754 M

Therefore, the molarity of the NaOH solution is 0.0754 M. Answer: 0.0754 M.

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The experimental value for ksp at 25°C for borax is 1.34. This value is slightly lower than the known value of 1.8.

Value can be defined as the worth of an object, idea, or service, calculated in terms of its ability to satisfy a need or desire. This can be in terms of money, time, effort, or any other resource. Value can be subjective and is often determined by the individual or group that is making the assessment. It can also be objective and determined by market forces, such as the supply and demand of a particular good or service. Value can also be determined by the utility or usefulness of an item, as well as its scarcity or rarity. Value can be used to compare different items and make decisions about which one to purchase or use.

The difference between the two values is likely due to experimental error or a slight difference in the chemical compositions of the two samples of borax.

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The bond angle between two adjacent hybrid orbitals is 120°, the hybridization is d. sp2.

The new set of hybrid orbitals creates trigonal structures, growing a molecular geometry of a hundred and twenty degreesThe accurate solution is a hundred and twenty degree. The sp2 s p 2 hybridization corresponds to a trigonal planar geometry and the bond attitude for this geometry is a hundred and twenty degree.

The geometry of the sp2 hybrid orbitals is trigonal planar, with the lobes of the orbitals pointing in the direction of the corners of a triangle. The attitude among any of the hybrid orbital lobes is a hundred and twenty°.aggregate of s and p orbital fashioned in trigonal symmetry and is maintained at 1200.

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The number of sulfate ions : 2.2 x 10²³

Reaction

Al₂(SO₄)₃⇒2Al³⁺+3SO₄²⁻

mol Al₂(SO₄)₃(MW=342,15 g/mol) :

\(\tt \dfrac{41.65}{342.15}=0.122\)

mol of sulfate ions (SO₄²⁻)

\(\tt 3\times 0.122=0.366\)

1 mol = 6.02 x 10²³ particles (ions, molecules, atoms), so for 0.366 mol :

\(\tt 0.366\times 6.02\times 10^{23}=2.20\times 10^{23}\)

The calculated concentration of citric acid in the juice samples will be overestimated due to the interference of Vitamin C.

Vitamin C, also known as ascorbic acid, is present in significant amounts in commercial juices. When NaOH is added to the juice sample to neutralize the citric acid, it reacts with the vitamin C as well, causing the volume of NaOH used to be higher than it should be.

This results in an overestimation of the concentration of citric acid in the sample. The reaction between vitamin C and NaOH is:

C6H8O6 + 2NaOH → Na2C6H6O6 + 2H2O

The NaOH reacts with both citric acid and vitamin C in the sample, which leads to an inaccurate measurement of the actual concentration of citric acid present in the juice. Therefore, it is essential to consider this interference while analyzing the results of the experiment.

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Answer:

particles in liquids have greater kinetic energy than particles in solids

Answer:

2.7g/table tennis ball.

Explanation:

You dont need to give your answer in three significant figures because it does not apply.

Answer:b

Explanation:

Answer:

substances created or made during a chemical reaction is known as the products

According to the given picture:

A represents the atomic number.

B represents the chemical symbol.

C represents the atomic mass.

D represents the name of the element.

Answer:atomic number 10 noble gas

Explanation:

a)  The Molar mass of  C₆H₆ is 78 g/mol

b) The Molar mass of   C₁₅H₂₂0₂  284 g/mol

To calculate the molar mass of a compound, use the periodic table to determine the atomic mass of each element and then multiply the atomic mass by the number of atoms of that element present in the compound.

For example, the molar mass of C₆H₆ (benzene) is 78 g/mol, which is calculated as follows:
C = 12 g/mol x 6 atoms = 72 g/mol
H = 1 g/mol x 6 atoms = 6 g/mol
Total = 78 g/mol

The molar mass of C₁₅H₂₂O₂ (stearic acid) is 284 g/mol, which is calculated as follows:

C = 12 g/mol x 15 atoms = 180 g/mol
H = 1 g/mol x 22 atoms = 22 g/mol
O = 16 g/mol x 2 atoms = 32 g/mol
Total = 284 g/mol

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Applejack, traditionally made through freeze distillation, is a method that utilizes the principles of crystal fractionation to concentrate the alcohol content in the beverage. Unlike apple brandy, which involves heating the alcohol-water mixture to separate the alcohol, applejack relies on freezing the mixture instead.

The process of making applejack using crystal fractionation involves the following steps:

1. Start with a fermented apple cider: Begin by fermenting apple juice or cider using yeast, allowing the natural sugars in the apples to convert into alcohol. The resulting fermented cider will have a relatively low alcohol content.

2. Freezing the cider: Transfer the fermented cider to a container that is suitable for freezing, such as a large, wide-mouthed vessel. Place the container in a cold environment, such as a freezer, and allow it to freeze slowly.

3. Fractionation: As the cider freezes, the water content in the mixture forms ice crystals, while the alcohol remains in the liquid state. The frozen ice crystals, which have a lower alcohol content, can be removed from the container, separating them from the alcohol-rich liquid.

4. Thawing and repeating the process: Thaw the remaining liquid, which is now more concentrated in alcohol. Repeat the freezing process multiple times to further concentrate the alcohol content. Each freeze-thaw cycle increases the alcohol concentration, gradually transforming the cider into applejack.

5. Final concentration and aging: Once the desired alcohol concentration is achieved, the applejack can be further aged, allowing the flavors to develop and mellow over time. This aging process can be done in barrels or other suitable containers.

It's important to note that the freeze distillation method used to produce applejack concentrates not only the alcohol but also any impurities or undesirable compounds present in the cider. Therefore, it is crucial to ensure that the starting cider used for fermentation is of high quality and free from any contaminants.

Additionally, it's worth mentioning that freeze distillation is regulated or prohibited in some jurisdictions due to potential safety concerns. It is always advisable to check local laws and regulations before attempting to make applejack or any other distilled beverage using this method.

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We can make use of the fact that the total pressure of the mixture is the same as the sum of the partial pressure of all the gases in the container. As a result, 400 kPa is the third gas' partial pressure.

The overall pressure exerted by a mixture of gases is equal to the sum of the partial pressures of each of the constituent gases, according to Dalton's law of partial pressures. The partial pressure is the pressure that each gas would have if it occupied the same volume of the mixture at the same temperature on its own.

Mathematically, this can be stated as:

P_total = P_1 + P_2 + P_3

When we plug these figures into the formula, we get:

800 kPa = 100 kPa + 300 kPa + P_3

When we simplify this equation, we obtain:

800 kPa = 400 kPa + P_3

By taking away 400 kPa from both sides, we arrive at:

P_3 = 400 kPa

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Answer:

It's either C or D

Explanation:

I'm learning this too! :)

Answer:

the answer is D

Explanation:

Answer:

D. Amount of time and area of physical contact between the substances

Explanation:

This is because with a greater surface area and more physical contact heat transfer can be transferred more quickly

Answer:

Option C = 150

Explanation:

First of all we will understand what is law of conservation of mass.

Law of conservation of mass:

This law stated that, mass can neither be created nor destroyed in a chemical equation.

This law was given by French chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

For example:

In given photosynthesis reaction:

6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂

there are six number of carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of chemical equation so this reaction followed the law of conservation of mass because mases are same on both side.

In given chemical reaction:

AB    + CD      →      X

50 g +  100 g    =  150 g

Thus option c is correct.

Answer:

Column A            \({}\)                                              Column B

1. CaS                   \({}\)                                              Calcium Sulfide

2. CaSO₄            \({}\)                                                Calcium sulfate

3. CaSO₃            \({}\)                                                 Calcium sulfite

Explanation:

1) Calcium sulfide is a compound formed between calcium, Ca, and sulfur, S, with a chemical formula of CaS. It forms cubic crystals similar to rock salt, and smells like rotten eggs

2) Calcium sulfate is a chemical compound consisting of calcium, Ca, and sulfate SO₄. It is found in nature in the hydrated form as the mineral gypsum

3)Calcium sulfite is a chemical compound formed between calcium, Ca and sulfite, SO₃ used to treat water and preserve food.

Answer:

the formula for calcium sulfite is CaSO3

the formula for calcium sulfate is CaSO4

the formula for calcium sulfide is CaS

Explanation: