you mix 76.15 g of Na2CO3 with 1.00 L of water to form a solution... You need 200.0 mL of a 0.10 M solution in the end. How much of the stock solution will you need to dilute to make the final solution?

There are 0.017 mm volume  hydrogen are formed at 715 mm hg and 19.0 deg c if 12.8 g of al react

The relationship between an object's mass and volume seems to be straightforward. The object's mass rises directly proportionately to its volume.

The given reaction is:

2 Al + 6 HCl → 2 alcl3 + 3 h2

It can be seen that, 3 mol of hydrogen is formed during the reaction.

Number of moles of hydrogen = 3

Mass = 12.8 g

d = 715 mmHg

Volume of hydrogen can be calculated as:

Density = mass /volume

Volume = mass / density

Put the values of given data in above expression.

Volume = 12.8 g  / 715 mm hg

Volume = 0.017 mm

Thus, volume of the hydrogen will be 0.017 mm

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Answer:Chloroplast

Explanation:

Answer:

D

Explanation:

Chloroplast

Answer:

Explanation:

The only answer you can get would be that the area was once covered with water.

A glacier wouldn't allow the fish to move

Predators would likely eat more than they would leave behind as evidence.

If they developed limbs, at some of them would show up that way.

I think the answer is beryllium.

because it's not sulfur or carbon and probably not cesium

Solute is the substance in a solution that has been dissolved. So option 4 is correct.

A homogeneous mixture of two or more substances, a solute is a substance dissolved in another substance known as a solvent. The concentration of a solute in solution is a measure of how well that solute is dissolved in a solvent, in terms of how much of that solvent, such as a salt, is present. The properties of solutes are:

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Answer:

female reproductive structures

The HCl concentration is 0.7755 M.

To determine the HCl concentration, you can use the concept of molarity and the balanced chemical equation for the reaction between NaOH and HCl:

NaOH + HCl → NaCl + H₂O

Since the reaction has a 1:1 stoichiometry, the moles of NaOH required for the titration will equal the moles of HCl in the sample. Use the formula:

moles = molarity × volume

First, find the moles of NaOH:

moles_NaOH = 0.150 M × 51.7 mL × (1 L / 1000 mL)

                       = 0.007755 moles

Since the moles of NaOH and HCl are equal, the moles of HCl are also 0.007755 moles.

Now, use the given volume of the HCl sample (10.0 mL) to find its concentration:

molarity_HCl = moles_HCl / volume_HCl

molarity_HCl = 0.007755 moles / (10.0 mL × (1 L / 1000 mL))

molarity_HCl = 0.7755 M

Thus, the HCl concentration is 0.7755 M.

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Answer: The answer is D :)

Explanation:

Answer:

D

Explanation:

The amount of water removed from every kilogram of commercial sea salt would be 27.57 kg.

Seawater contains 3.5% sodium chloride by mass. This means every 1 kg of seawater contains 0.035 kg of sodium chloride.

Sea salt contains about 10% water. This means every 1 kg of sea salt contains 0.1 kg of water.

In order to calculate the amount of water removed from every kilogram of commercial sea salt produced, we need to know the amount of seawater that will give 1 kilogram of sea salt.

We said every 1 kg of seawater contains 0.035 kg of salt. How many 0.035 kg can be found in 1kg?

1/0.035 = 28.57

This means 28.57 kg of seawater would need to be processed in order to have 1 kg of salt. Thus, the amount of water removed can be calculated as:

28.57 - 1 = 27.57 kg

In other words, about 27.57 kg of water is removed for every kilogram of commercial salt produced.

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Answer:

Explanation:

Branches or side chains are called alkyl radicals, they are named substituting the termination -ano for -yl or -il when it is part of a hydrocarbon.

Answer:

D. 97%

Explanation:

♪＼(*＾▽＾*)／＼(*＾▽＾*)／

Answer:

d

Explanation:

Answer:

2.08 L

Explanation:

\(V_{2} = V_{1}\) \((\frac{P_{2} }{P_{1} })\)

= 2.50L × \((\frac{1.25 atm}{1.5 atm} )\)

=2.08L

The only thing in nature which can exists in all the three states equally is water. Water can easily interchange between gas , liquid or solid.

There are three states on which matter can exist namely solids, liquid and gas. Solid state of a substance have definite shape, volume and size. In solids, molecules are closely packed and have no space in between to move apart.

In liquids, molecules have some space to move and thus they flow like water thereby have no definite shape but have definite volume. In gases, molecules have negligible intermolecular attraction and thus are far apart. Gas molecules spread over the atmosphere.

Most of the substances are usually exists any one of the state but can converted to other states. However, in nature, water is exists in all the three states as liquid water, water vapor and solid ice

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MnO4- acts as an oxidizing agent, whereas SO2 acts as a reducing agent.

An oxidizing agent is a chemical species that causes oxidation in another substance by receiving electrons from it. To put it another way, it is a chemical that makes it easier for electrons to move from the object being oxidized to itself.

When an oxidation occurs, electrons are lost or the oxidation state is increased; when a reduction occurs, electrons are gained or the oxidation state is decreased.

In this equation, MnO4- + SO2 + H2O → Mn2+ + SO42- + 2H+

Because it causes SO2 to undergo oxidation (i.e., lose electrons) and goes through reduction itself, MnO4- is the oxidizing agent in this equation (i.e., gains electrons).

Due of its ability to both reduce MnO4- and oxidize itself, SO2 is the reducing agent.

Mn2+ is not an oxidizing agent because it is the end result of the reduction of MnO4-.

As SO42- is a byproduct of SO2 oxidation, it cannot act as a reducing agent.

MnO4- is therefore the oxidizing agent, whereas SO2 is the reducing agent.

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Answer:

The theory supported by the evidence in the table is,

Theory B, Gas molecules are trapped between the layers allowing the layers to slide over one another  

Explanation:

The table showing the ability of graphite to act as a lubricant in different locations is given as follows;

Ability to act as a lubricant     \({}\)        Location

Earth's surface                          \({}\)       Good

High altitude          \({}\)                          Average

Outer space           \({}\)                          Very poor

The crystals of graphite are made up of graphenes which are rings of atoms of carbon atoms arranged in parallel planes. The bonds between graphene planes are Van der Waals forces, such that under appropriate conditions, the planes easily slide relative to one another which partly gives graphite its lubricating property when used in air

When adsorbed on the surface of the graphite, molecules of water reduces the force bonding the planes of the graphenes further such that the graphite's lubricating property is related to the availability of water vapor

Therefore, given that the lubricity of graphite is highly dependent on the availability of water vapor, and that the availability of water vapor which is a gas, is reduced with increasing altitude, to being absent in outer space, the theory supported by the evidence in the table is Theory B, which states that  gas molecules are trapped between the layers allowing the layers to slide over one another.

1.Diprotic acid release two H⁺ ions whereas triprotic acid release three H⁺ ions.

2. Suppose the formula of triprotic acid is H3A.

Ionization equations:

H₃A + H₂O ⇄ H₂A⁻ + H₃O⁺

H₂A⁻ + H₂O ⇄ HA²⁻ + H₃O⁺

HA²⁻ + H₂O ⇄ A³⁻ + H₃O⁺

3.  Indicator is used to locate the end point in traditional titration. But, no need to use an indicator in pH titration because sudden pH change indicate the end point.

4. Equivalence point is the point in titration at which the amount of titrant added is just enough to completely neutralize the analyte solution.

5. pKa is negative log of Ka. The pKa-values of the amino acid are decided from the overall titration graph. To determine pKa1 and pKa2, find the extent on the graphs 1/2 manner between the 2 equivalence factor volumes determined from the accelerated spinoff curves. The pH at this factor is in the titration is equal to pKa2.

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Experiments that could be done in one of their laboratories at the University of Florida may include studies on drug efficacy, genetic research, and disease prevention.

The laboratories at the University of Florida offer a wide range of possibilities for medical researchers to conduct experiments in various areas of health studies. These laboratories serve as vital spaces for advancing knowledge and improving healthcare outcomes. Among the potential experiments that could be conducted are studies on drug efficacy, where researchers investigate the effectiveness of different medications in treating specific conditions. Genetic research is another area of focus, involving the analysis of genes and their impact on health and disease. Additionally, laboratories can be utilized for disease prevention studies, aiming to identify risk factors, develop preventative strategies, and explore innovative approaches to public health challenges.

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The choice of procedure used to determine the pH of a solution depends on the accuracy, sensitivity, and cost required for the specific application. Additionally, careful attention should be paid to potential sources of error in order to ensure accurate and reliable pH measurements. The most commonly used procedures are pH paper, pH meter, and indicators.

One of the major advantages of using pH paper is that it is relatively inexpensive and easy to use. Additionally, it can provide a quick estimate of the pH of a solution. However, it has limited accuracy and sensitivity, and the color change may be difficult to interpret. On the other hand, a pH meter is more accurate and sensitive than pH paper and can provide a digital reading of the pH. This method is particularly useful for solutions with very high or low pH values. However, it is more expensive and requires calibration, maintenance, and regular replacement of electrodes. Indicators are also commonly used to determine pH, particularly in titrations. They are inexpensive and can provide a quick estimate of the pH. However, the accuracy and sensitivity of the method depend on the quality of the indicator used. When determining the pH of a solution, there are also several sources of error that should be considered. One common source of error is contamination of the solution or equipment used. Another source of error is inadequate mixing of the solution, which can lead to localized variations in pH. Additionally, temperature changes can affect the pH measurement, particularly with pH meters. Finally, inaccurate calibration of the equipment used can also result in errors in pH measurement.

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Answer: 9

Explanation:

Answer: They usually dissolve in Polar Solvents

Explanation:

Answer: Ionic/ Polar solvents.

Explanation:

• Ionic or polar compounds will dissolve in ionic or polar solvents.

• Water is a universal solvent because it can dissolve both ionic and polar covalent compounds.

Answer:

I think it’s 7.0 moles of water.

Explanation:

gj

Group 1 elements will be more reactive than group 2 because group 1 element has one valence electrons.

The kind of elements which posses 1 valence electrons, will  be kept in group 1. Due to it has 1 valence electrons, hence it will be more reactive.

In a group, by moving top to down in the periodic table reactivity increases.

Reactivity would be a parameter that expresses how easily a substance reacts chemically. The chemical may react alone or in combination with some other atoms or molecules, and energy is often released as a result of the reaction. The most reactive substances and elements have the potential to spontaneously as well as explosively ignite.

Therefore, group 1 elements will be reactive than group 2 elements.

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The product of the given reaction CH3CCl4 + Cl2 will be 1-chloro-3-methylbenzene.

In the given reaction, CH3CCl4 (tetrachloromethane or carbon tetrachloride) reacts with Cl2 (chlorine) to produce a substituted benzene compound.

The CH3 group attached to the central carbon of CH3CCl4 will undergo substitution with chlorine from Cl2.

The reaction follows an electrophilic aromatic substitution mechanism. The chlorine atom in Cl2 acts as an electrophile, attacking the electron-rich benzene ring. The chlorine atom replaces one of the hydrogen atoms on the benzene ring.

Since the CH3 group is a strong activating group, it directs the incoming chlorine atom to the ortho and para positions relative to itself.

In this case, the chlorine atom will substitute at the ortho (o) and para (p) positions of the benzene ring, resulting in the formation of o-chlorotoluene and p-chlorotoluene.

Therefore, the product of the given reaction will be a mixture of o-chlorotoluene and p-chlorotoluene. It is important to note that the presence of the methyl group (CH3) in the reactant CH3CCl4 determines the substitution pattern on the benzene ring.

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Answer:

I believe the answer is A (changes in air temperature  result in differences in air pressure which causes wind). Hope this helps

Explanation:

you need to add 9L of water to 10mL of the solution of HCl with a pH of 3 to change the pH of 6.

First, calculate the amount of HCl present in 10mL of the solution with a pH of 3:

10mL x 0.1M = 1 mmol HCl

Then, calculate the amount of HCl required to raise the pH to 6:

1 mmol HCl x (10^3 - 10^6) = 9 mmol HCl

Finally, calculate the amount of water required to add 9 m mol of HCl to the solution:

9 mmol HCl x (1L/1000 mmol HCl) = 9L water

Hence, you need to add 9L of water to 10mL of the solution of HCl with a pH of 3 to change the pH of 6.

What is ph?

pH is a measure of acidity and alkalinity. It is measured on a scale of 0 to 14, with 0 being the most acidic and 14 being the most basic (alkaline). A pH of 7 is neutral.

Therefore, you need to add 9L of water to 10mL of the solution of HCl with a pH of 3 to change the pH of 6.

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The function y = |x| - 3 is translated 3 units downward from the parent function.

The parent function of y = |x| is the absolute value function. The function y = |x| - 3 is obtained by subtracting 3 from the parent function.

we make a comparison in order to determine the translation of the function, it to the parent function.

In the question,  the translation is in the vertical direction and because  we subtract 3 from the parent function, the graph of y = |x| - 3 is shifted downward by 3 units compared to the parent function y = |x|.

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Answer: Based on Rock Formation, the student's judgment that Rock 2 is more likely to contain a fossil than Rock 1 is appropriate.

Explanation:

Rocks are classified into three types:

Igneous rocks, metamorphic rocks, and sedimentary rocks.

Rock 1 is an Igneous Rock.

When a fiery, molten rock crystallizes and hardens, it forms igneous rocks (from the Latin root word fire).

Rock 2 is a Sedimentary Rock

At standard surface temperatures, sedimentary rock is developed at or near the Earth's surface by the build-up and lithification of sediment (detrital rock) or by precipitation from suspension (chemical rock).

Under low temperatures and pressure, rock deposits produce sedimentary rocks in the ocean and on the Earth's crust. Plants and animals die and are deposited in a sedimentary deposit.

The following are the reasons why sedimentary rocks are the only rock types that hold fossils:

The burial of deceased plants and animals by additional sediment results in the build-up of minerals from water in bones, which leads to the development of fossils.

As a result, sedimentary rocks are the only rock types that retain fossils.

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1. B, the energy associated with the motion of an object

2. C, 12.4 g/mL

3. C, 5

1) B) Kinetic energy is energy associated with the motion of an object.

2) B) Density equals mass divided by volume: 1.38 g/mL

3) C) There are 5 significant figures in 20.300

4) A) 80 is the atomic number for mercury on the periodic table.

5) E) The formula for copper (II) sulfate pentahydrate is CuSO4•5H2O

So in summary:

• Kinetic energy is the energy of a moving object due to its motion.

• Density is calculated by dividing an object's mass by its volume.

• Significant figures refer to the known precision of a measurement based on the digits reported.

• Atomic symbols represent elements on the periodic table.

• Chemical formulas use symbols of the elements to show the proportions of atoms in a compound.

Answer:

The effect of adding a solute to a solvent has the opposite effect on the freezing point of a solution as it does on the boiling point. A solution will have a lower freezing point than a pure solvent. The freezing point is the temperature at which the liquid changes to a solid.

Explanation:

Hope this helps :3

The change in freezing point of a solution is inversely proportional to the number of solute particles in the solution and dependent on the type of particle,is the the TRUE statement.

The change in freezing point of a solution is inversely proportional to the number of solute particles in the solution and dependent on the type of particle,is the the TRUE statement.

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not gon find it here cuh

Explanation:

The concentration of the acetic acid solution is approximately 0.0128 mol/L, given the information provided.

To determine the concentration of the acetic acid solution, we need to use the given enthalpy change and the heat evolved in the reaction.

The enthalpy change (ΔH) is given as 55.7 kJ/mol, which represents the heat released or absorbed per mole of acetic acid involved in the reaction.

The heat evolved in the reaction is given as 716.12 J. However, we need to convert it to kilojoules to match the unit of the enthalpy change. There are 1000 J in 1 kJ, so 716.12 J is equal to 0.71612 kJ.

Now, we can set up a proportion to find the concentration of the acetic acid solution. The heat evolved is directly proportional to the moles of acetic acid involved in the reaction, which is in turn proportional to the concentration of the solution.

Let's assume the concentration of the acetic acid solution is c mol/L.

The proportion can be set up as:

ΔH (kJ/mol) / Heat evolved (kJ) = 1 mol / c L

Substituting the values we have:

55.7 kJ/mol / 0.71612 kJ = 1 mol / c L

Simplifying:

c = 1 mol / (55.7 kJ/0.71612 kJ)

c ≈ 0.0128 mol/L

Therefore, the concentration of the acetic acid solution is approximately 0.0128 mol/L, given the information provided.

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