Bone was dissolved in hydrochloric acid, giving 50,0 mL of solution containing calcium chloride, CaCl2. To precipitate the calcium ion from the resulting solution, an excess of potassium oxalate was added. The precipitate of calcium oxalate, CaC2O4, weighed 1,437 g. What was the molarity of CaCl2 in the solution?

Answer:

1 light year = 9.46×10 to the power 15m

light year in a distance travelled by light is 1 year.

Explanation:

according to discussion one light year,90 years request to 9.46 In two turns to Devours

15 ft and light .Hence,A distance travel by light in one year,so light year,a unit of you need a distance.

Answer:

Sound waves required a medium.

Explanation:

In space, there is only vacuum hence no any medium for sound wave travel.

Since sound waves are mechanical waves, they require a material medium such as air, hence no sound transmission.

Answer: There is no air.

Explanation:

Because there is no air in space, there is no way for air to travel in space.

Air needs to push on your eardrums or air in general to move through space when there is no air your eardrums won’t move from the air making it quiet.

Answer: A The Triangle Fire was a tragedy that could have been prevented.

Explanation:

The Triangle Fire was a tragedy that happened in the factory of Shirtwaist Company in New York City where there was.a.fore outbreak and about 145 employees of the company were killed.

The deaths could have been prevented because the company neglected safety measures such as having a good and reliable pump system, having readily available fire extinguishers. Also, what resulted in the lethal nature of the incident was because the doors within the building of the factory were locked.

The tragedy generated lots of attention and series of laws were been out in place in order to ensure that workers are safe at their workplace.

Answer:

grass

Explanation:

ice and tile are smooth and without any bumps or large ridges, unlike grass which is spiky and flexible. grass will most likely slow down a ball that is rolling, unlike answer choices B and C.

Answer:

grass

Explanation:

ice and tile are bothe a flat surface where grass has texture

Answer:

7.8286×10^21 particles

Explanation:

atomic mass of potassium = 39.1 u

1 u = 1 g/mol

Potassium (K) = 39.1 g/mol × 2 =  78.2 g/mol

Oxygen (O)     =     16 g/mol × 1  =    16  g/mol

K₂O = 94.2 g/mol

1.224 g / 94.2 g/mol = .013 moles

Avogadro's number = 6.022×10²³

particles = moles x Avogadro's number

particles = .013 moles x 6.022×10^23

particles = 7.8286×10^21 particles

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socratic

The ranking of the given organic compounds according to the decreasing order of viscosity is CH₃CH(CH₂)₁₁CH₂CH₃ > CH₃CH₂(CH₂)₆CH₂CH₃ > CH₃CH₂CH₂CH₂CH₃, and the increasing order of viscosity is CH₃CH₂CH₂CH₂CH₃ < CH₃CH₂(CH₂)₆CH₂CH₃ < CH₃CH(CH₂)₁₁CH₂CH₃.

Viscosity is a property of material which describes the resistance of a fluid to shearing flows. Viscosity corresponds roughly to the intuitive notion of a fluid's thickness. For example, honey has a much higher viscosity than water.

Viscosity is measured by using a device known as viscometer. Measured values of viscosity span several orders of magnitude. Among all the fluids, gases have the lowest viscosities, and thick liquids have the highest.

The above mentioned hydrocarbon has different viscosity and hence they are arranged in order of their viscosity.

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Answer:

but purely citric acid synthetic Acid whose moller mass is equal to 192 g per mole. Okay, so here we have Modernity is even McGarity is equal to 0.5 M and we have volume, so Volume is equal to 200 mililiters  is equal to 0.1 liter  Okay, so they are asking to calculate the mass of what u have  Okay. So first of all, if we want to calculate the mass of then we have to calculate the number of moles. So maturity is equal to the number of moles per volume in liters . So you mean zero point sorry from this one number of moles is equal to So N is equal to m multiplied very weak. So that is equal to 0.1 and 0.5. So that is equal to 0.05 moles. Okay, now the mask is equal to the mass of cool eh is equal to the number of Okay. Number of 0.5 and it is multiplied by 92 g per mole. Then it is equal to 9.6 g. So this is the mass of a present. A 0.500 ml

Answer: A catalyst is a substance that speeds up the rate of a chemical reaction without being used up and remains chemically unchanged itself .

Explanation: For a reaction to take place the particles must collide with enough energy for bonds to break and reaction to occur .

BUT when a catalyst is present the reactants are able to react in a way that requires less energy ,leading to more successful collision so the reaction speeds up without the chemical composition of the catalyst being affected

NOTE: the catalyst must be chosen to suit the particular reaction

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1. Soil serves as a:

medium for plant growth,

regulator of water supplies,

recycler of raw materials,

habitat for soil organisms, and.

landscaping and engineering medium.

2. Soil organisms, which range in size from microscopic cells that digest decaying organic material to small mammals that live primarily on other soil organisms, play an important role in maintaining fertility, structure, drainage, and aeration of soil.

3. Advances in watershed, natural resource, and environmental sciences have shown that soil is the foundation of basic ecosystem function. Soil filters our water, provides essential nutrients to our forests and crops, and helps regulate the Earth's temperature as well as many of the important greenhouse gases.

If a sealed container of gas is placed into a fire, the temperature of the gas inside the container would increase, causing the pressure of the gas to increase as well.

If a sealed container of gas is placed into a fire, the temperature of the gas inside the container would increase, causing the pressure of the gas to increase as well. This is because the kinetic energy of the gas molecules would increase, causing them to move around more rapidly and collide with the walls of the container more frequently and with greater force. Eventually, if the pressure of the gas inside the container becomes too great, the container may rupture or explode, releasing the gas into the surrounding environment. This can potentially lead to a dangerous situation, especially if the gas is flammable or toxic. Therefore, it is important to never place a sealed container of gas into a fire.

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Answer:

Most animals have skeletons that give those animals their shape. You can identify most of those animals by those same skeletons.

Explanation:

The passage

Answer:

Ley.

Explanation:

En la teoría de la ciencia, la regularidad de los procesos en la naturaleza se denomina ley de la naturaleza. Las leyes naturales se diferencian de otras leyes en que los seres humanos no pueden ponerlas en vigor ni anularlas a su discreción. En tal sentido, la composición química del agua es indudablemente una ley natural, en tanto el hombre no puede modificarla sin modificar las características inherentes del agua como tal.

To determine the number of molecules of oxygen in two molecules of  titanium dioxide, we need to consider the composition of . each molecule of oxygen consists of two oxygen atoms, the number of molecules of oxygen would be: 2 molecules of O2 Correct answer is option C

The chemical formula for titanium dioxide indicates that each molecule of titanium dioxide consists of one titanium (Ti) atom and two oxygen (O) atoms. This means that each molecule of  titanium dioxide contains two oxygen atoms.

Given that we have two molecules of  titanium dioxide, we can calculate the total number of oxygen atoms by multiplying the number of molecules by the number of oxygen atoms per molecule: 2 molecules of  titanium dioxide* 2 oxygen atoms/molecule = 4 oxygen atoms Therefore, two molecules of  titanium dioxide contain a total of four oxygen atoms.

Since each molecule of oxygen consists of two oxygen atoms, the number of molecules of O2 would be:4 oxygen atoms / 2 oxygen atoms/molecule = 2 molecules of oxygen So, the correct answer is option C)

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A Thoraeus filter combines all of the following materials EXCEPT silver.

A Thoraeus filter is an intermetallic compound which combines copper, tin and aluminum. The filter is used in a range of applications including catalytic converters in cars, corrosion-resistant coatings, and electrical contacts.

A Thoraeus filter is an intermetallic compound that is formed by combining copper, tin, and aluminum. The composition is around Cu₃SnAl₂, and it is named after the Swedish metallurgist Per Thoraeus. A Thoraeus filter is used as a filter for metals, gases, and liquids.

The filter has a wide range of applications including catalytic converters in cars, corrosion-resistant coatings, and electrical contacts. It is highly resistant to corrosion, and is therefore widely used in environments where metal corrosion is a problem. Thoraeus filters are also used in high-temperature applications because of their high melting point. They can be made in various shapes and sizes to suit specific applications. The filters have high thermal conductivity and are therefore ideal for use in heat exchangers and other applications where heat transfer is important.

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Answer:

radio and sound

Explanation:

Because they are waves in motion

Answer:

190

Explanation:

Gold has atomic number of 79, which is the number of protons.

Mass number = #protons + #neutrons = 79 + 111 = 190

Answer:

Rubidium

Explanation:

Add the exponents: 2+2+6+2+6+2+10+6+1=37

Look for the atomic number 37

The element having electronic configuration 1s₂, 2s₂, 2p₆, 3s₂, 3p₆, 4s₂, 3d₁₀, 4p₆, 5s₁ is rubidium .

A chemical element is a species of atoms, including the pure substance made entirely of that species, that have a specific number of protons in their nuclei. Chemical elements, in contrast to chemical compounds, cannot be reduced by any chemical process into simpler molecules.

They can be identified by their particular atomic number. The periodic table groups the elements according to their atomic number and draws attention to those with related qualities.

The most vital ingredient for life is carbon. Life as we know it would not exist without this element. You'll see that carbon is the main component of the chemicals required for life.

Thus, The element having electronic configuration 1s₂, 2s₂, 2p₆, 3s₂, 3p₆, 4s₂, 3d₁₀, 4p₆, 5s₁ is rubidium .

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Answer:

The answer is biochemistry

Explanation:

Biochemistry is a field of science that studies the chemistry and chemical processes involved in a living system. These chemical processes include glycolysis, gluconeogenesis, citric acid cycle, pentose phosphate pathway among others. Biochemistry studies the relatedness of these processes, the importance of these processes and how these processes can or cannot be regulated.

The chemical formula for citric acid is C6H8O7. Citric acid is a weak organic acid found naturally in citrus fruits such as lemons and limes. It is also used as an ingredient in many foods, drinks, and dietary things.

Citric acid has many uses. It is used as a flavoring agent, preservative, and pH adjuster. It is also used in cleaning and laundry products, metal cleaning products, and cosmetics. In addition, it is used in pharmaceuticals and in treating kidney stones. Citric acid is also used as a chelating agent, to bind metal ions in solution, and as a sequestrant, to prevent minerals such as calcium and magnesium from forming insoluble precipitates.

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The pressure exerted by only the hydrogen gas is 735.5 mmHg, the pressure can be determined by the Dalton's Law of Partial Pressure.

In this case, the total pressure is given as 753 mmHg, which is the sum of the partial pressures of the hydrogen gas and the water vapor. Since the hydrogen gas is collected over water, we know that some of the water vapor is also contributing to the total pressure.

To account for this, we need to subtract the vapor pressure of water at 20.0°C from the total pressure. According to a vapor pressure chart, the vapor pressure of water at 20.0°C is 17.5 mmHg.

So, the partial pressure of the hydrogen gas can be calculated as:

Partial pressure of hydrogen gas = Total pressure - Vapor pressure of water

Partial pressure of hydrogen gas = 753 mmHg - 17.5 mmHg

Partial pressure of hydrogen gas = 735.5 mmHg

To determine the pressure exerted by only the hydrogen gas, we need to use Dalton's Law of Partial Pressures, which states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of each individual gas.

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The noble gases have 8 valence electrons. Helium (He) has two valence electrons, while the other noble gases (Neon, Argon, Krypton, Xenon, and Radon) have 8 valence electrons.

The noble gases are a group of elements found in the periodic table that are characterized by having a full outer shell of electrons. This means they are extremely stable and rarely react with other elements. The noble gases are helium, neon, argon, krypton, xenon, and radon.

Helium has two valence electrons, while the other noble gases have eight valence electrons. This is because helium only has two electrons in its outer shell, while the other noble gases have eight electrons in their outer shells.

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Ar's particle volume is larger than Ne's, Ar(g) deviates from ideal behavior at extremely high pressures more than Ne(g).

The volume of the gas is insignificant compared to the container when thinking about a gas ideal behavior. The forces of attraction between the particles are insignificant. At very high pressures, Ar(g) deviates from ideal behavior more than Ne(g).

Because Ar has a larger particle volume than Ne, Ar(g) deviates from ideal behavior at extremely high pressures more than Ne(g).

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Takealot excels at providing convenience, extensive product selection, competitive pricing, and a seamless online shopping experience as its value proposition for consumers.

Convenience is a key aspect of Takealot's value proposition. As an online retailer, Takealot offers the convenience of 24/7 shopping from the comfort of one's own home.

Customers can browse a wide range of products, place orders, and have them delivered directly to their doorstep.

Takealot also offers an extensive product selection, spanning various categories such as electronics, fashion, home goods, and more.

This breadth of choices allows consumers to find and compare different products all in one place, saving them time and effort compared to traditional retailers with limited inventory.

Competitive pricing is another area where Takealot excels. By operating online, the company has lower overhead costs compared to brick-and-mortar retailers, enabling them to offer competitive prices and discounts to their customers.

The seamless online shopping experience provided by Takealot includes user-friendly interfaces, secure payment options, and efficient delivery services. This enhances customer satisfaction and convenience.

In contrast, traditional non-online retailers typically have limited operating hours, smaller product selections, and may not offer the same level of convenience and competitive pricing.

They often require customers to physically visit their stores, which can be time-consuming and may not provide the same level of ease and accessibility as online platforms like Takealot.

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The money lost through the recrystallization process \(= 196.2 \times 10^9=196.2\) billion

As per the data given in the question,

Mass of aspirin formed =1.366 g

Mass of recrystallized aspirin =0.209 g

Loss of mass of aspirin during recrystallization =1.366-0.209 g=1.157 g

Per cent loss \(=\frac{1.157}{1.366} \times 100=84.7 \%\)

Cost of 1 mg aspirin =0.0861 cents

cost of 1.157 g or 1157 mg aspirin \(=0.0861 \times 1157=99.6177\) cent =1 (approximately)

41000 metric tons of aspirin \(=41000 \times 100 kg=41000 \times 1000 \times 1000 g=41 \times 10^9g\)

Loss during production of \(0.209 g\) of aspirin =1

Loss during production of \($41 \times 10^9 \mathrm{~g}$\) of aspirin \($=1 / 0.209 \times 41 \times 10^9=196.2 \times 10^9$\)

Hence, loss \(= 196.2 \times 10^9=196.2\) billion

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People become scientists when they deeply about how to solve problems.

The controversy between nature and nurture lies at the core of psychology. The  excerpt to which you refer is not shown here but I will try to help you as much as I can.

First of all, science is a career that can be chosen hence I do not agree that scientists are born. Scientists are made because people become scientists by investigating and seeking to find solutions to diverse human problems. If people think deeply about how to solve problems, they can become great scientists.

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Answer:

Explanation:

Molecular weight of Al: 27

Molecular weight of O: 16

Percentage composition of Al by weight in Al2O3

= (27*2) / (27*2 + 16*3)

= 0.5294

In 200 grams of Al2O3, there are

= 200*0.5294

= 105.88 grams of Al

77.18 grams of Al was produced in the experiment.

Percent yield for the experiment

= product mass / reactant mass * 100%

= 77.18 / 105.88 * 100%

= 72.89%

Answer: B. The reaction releases 400 kJ of heat.