What is the percent yield (omit % symbol in the answer) if reaction of 42.3 g of carbon yields
44.7 g of carbon disulfide? 5 C(s) + 2 SO2 (9) CS2 (9) + 4CO (9)

Answer:

\(16\ \text{ppm}\)

Explanation:

Mass of one tablet = 20 mg

Mass of two tablets = \(2\times 20=40\ \text{mg}\)

Percent that is soluble in water = 40%

Mass of tablet that is soluble in water = \(0.4\times 40=16\ \text{mg}\)

So, mass of solute is \(16\ \text{mg}\)

Density of water = 1 kg/L

Volume of water = 1 L

So, mass of 1 L of water is \(1\times 1=1\ \text{kg}=1000\ \text{g}\)

PPM is given by

\(\dfrac{\text{Mass of solute}}{\text{Mass of solvent}}\times 10^6=\dfrac{16\times 10^{-3}}{1000}\times 10^6\\ =16\ \text{ppm}\)

Hence, the concentration of iodine in the treated water \(16\ \text{ppm}\).

The mass of the water that could be brought to the boiling point is equal to 4481.35 g. Therefore, option (C) is correct.

The specific heat capacity of a substance is defined as the quantity of heat required to increase the temperature in one unit of substance by one-degree Celcius.

Whenever the energy is lost or absorbed the temperature of the substance will be changed:

Q = mCΔT

Given, the amount of energy transferred, Q = 1500 Kj

The change in the temperature = 100 -20 = 80°C

The specific heat capacity of the water, C = 4.184 J/g°C

The mass of the water for the given change in temperatures can be calculated as:

1500 KJ = m × (4.184 J/g°C) × 80°C

m = 4481.35 g

Therefore, the mass of the water is 4481/35 grams.

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Answer:

Other species will slowly die, because the species that eat snails and crayfish will not have anything to eat, then the thing that eats them will not have anything. This process will go on and on. So long story short populations will decrease, then off.

Weakness and nausea are the responses of vomiting and fever. Because people tend to feel weak and uneasy after vomiting.

A response is a response to a stimuli, such as a question, an experience, or another kind of stimulus. You are experiencing an emotional reaction to the drama being played out on screen if you cry during sad movies. A response can take many different forms, such as an explanation for a question, an emotional response, or a rejoinder.

The act of vomiting is the forceful ejection through the mouth of the contents of the upper digestive tract and stomach. It can also be referred to as throwing up or feeling ill.

Vomiting is a reflex that aids the body in getting rid of potentially dangerous chemicals. The majority of people will eventually vomit.

This information relates to vomiting in adults and kids older than 12. For details pertaining to children between the ages of 0 and 12 years, see vomiting in children.

Therefore, Weakness and nausea are the responses of vomiting and fever.

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Answer:

endothermic reaction; need more info on the reactants to answer the other questions

Explanation:

Given the change in bond energy of 187 kJ/mol, you can determine whether the reaction is endothermic or exothermic. If the bond energy is positive, the reaction is endothermic, meaning it absorbs energy. If the bond energy is negative, the reaction is exothermic, meaning it releases energy. In this case, the bond energy is positive so it's an endothermic reaction.

Answer:

1.06 °C

Explanation:

From the question given above, the following data were obtained:

Mass of gold (M₉) = 10 g

Specific heat capacity of gold (C₉) = 0.129 J/gºC

Initial temperature of gold (T₉) = 24 °C

Mass of water (Mᵥᵥ) = 118 g

Specific heat capacity of water (Cᵥᵥ) = 4.184 J/gºC

Initial temperature of water (Tᵥᵥ) = 1 °C

Equilibrium temperature (Tₑ) =?

The equilibrium temperature of the system can be obtained as follow:

Heat loss by the gold = heat gained by the water

M₉C₉(T₉ – Tₑ) = MᵥᵥCᵥᵥ(Tₑ – Cᵥᵥ)

10 × 0.129 (24 – Tₑ) = 118 × 4.184 (Tₑ – 1)

1.29(24 – Tₑ) = 493.712 (Tₑ – 1)

Clear bracket

30.96 – 1.29Tₑ = 493.712Tₑ – 493.712

Collect like terms

30.96 + 493.712 = 493.712Tₑ + 1.29Tₑ

524.672 = 495.002Tₑ

Divide both side by 495.002

Tₑ = 524.672 / 495.002

Tₑ = 1.06 °C

Therefore, the temperature of the system is 1.06 °C

The amount of heat of the system is measured by a device called a calorimeter. The final temperature of the system will be 1.06 degrees celsius.

The equilibrium temperature is the temperature that follows the law of thermodynamics and is said to be the system that has alike temperatures.  

Given,

Mass of Ag \(\rm (M_{g})\) = 10g

Specific heat capacity of Ag \((\rm C_{g})\) = \(\rm 0.129 J/g^{\circ}C\)

The initial temperature of Ag \((\rm T_{g})\) = \(24 ^{\circ}\;\rm C\)

Mass of water \((\rm M_{w})\) = 118 g

Specific heat capacity of water \((\rm C_{w})\) = \(4.184 \rm \;J/g^{\circ}\;\rm C\)

The initial temperature of water \((\rm T_{w})\) = \(1 ^{\circ}\;\rm C\)

Equilibrium temperature = \((\rm T_{e})\)

The equilibrium temperature can be shown as, heat loss by the gold = heat gained by the water:

\(\rm \rm M_{g}C_{g}(T_{g} - T_{e}) = M_{w}C_{w}(T_{e}-C_{w})\)

Substituting values in the equation:

\(\begin{aligned} 10 \times 0.129 (24 - \rm T_{e}) &= 118 \times 4.184 (\rm T_{e} - 1)\\\\\rm 1.29(24 - T_{e}) &= 493.712 (\rm T_{e} - 1)\\\\524.672 &= 495.002 \;\rm T_{e}\end{aligned}\)

Now divide both the sides by 495.002:

\(\begin{aligned} \rm T_{e} &= \dfrac{524.672 }{495.002}\\\\\rm T_{e} &= 1.06 \;^{\circ}\rm C\end{aligned}\)

Therefore, the final temperature of the system is 1.06 degrees celsius.

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Explanation:

If we compare its solubility products without any calculation then, Magnesium hydroxide is more soluble than compound A and C. Magnesium hydroxide is less soluble than compound D.

- The solubility product of magnesium hydroxide and zinc carbonate is same so it is not possible to determine whether it is more or less soluble than compound B

Carbon atoms may thus form bonds to as many as four other atoms. For example, in methane (CH 4​start subscript, 4, end subscript), carbon forms covalent bonds with four hydrogen atoms

__________________________________________________________

Answer:

The answer is "how closely the model's behavior matches the real world "

Explanation:

Your options were glitched out, so it only showed A and C, and B and D were blank so lol

The Two Aspects of Science: Control over nature and understanding of nature must both be held in equal honor.

Answer:

butane

Explanation:

I hope this helps!

Answer:

Butane

...............

Answer: 0.0096g/cm^3

Explanation: density = mass/1.33*pi*r^3

How much of the original sample will still be there at the end of the second year if the half-life of a radioactive isotope sample is one year? by the third year's end?

when the fourth year comes to an end? Answer The balance at the conclusion of the second year equals 1 4 times the initial amount. The balance at the conclusion of the third year is equal to 1/8 of the initial amount. Radioactive isotopes that are unstable usually undergo radioactive decay in order to become stable. The nucleus of the isotope undergoes a spontaneous nuclear transition during this event, and particles and energy are released. The decay process causes half of the isotope's initial mass to disintegrate at a specific point in time known as the half-life.

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Yes, according to E.F. Codd, the relational model's founder, the values in a relational database must be atomic, which means indivisible and indestructible. This means that each attribute value,

must represent a single, indivisible unit of data and cannot be subdivided. This guarantees that each attribute value may be viewed as a distinct object and edited and processed as such. Along with domain independence and normalization, the idea of atomicity is one of the basic concepts of the relational model.This means that each attribute value must represent a single, indivisible unit of data and cannot be subdivided. This guarantees that each attribute value may be viewed as a distinct object and edited and processed as such. ccording to e.f. codd, who theorized the concept of the relational model, the actual value for the combination of attribute name and type must be atomic.

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Answer:

a. Propanol

b. Propanone

c. Butanal

Explanation:

From the given information:

We are to state which of the given samples are more soluble in water.

The solubility of an organic molecule in water depends on the polarity of the given organic molecule. This solubility behaviour conforms with the general rule -"like dissolve like". Solubility is a means of comparing the extent to which different solutes can dissolve in a particular solvent at a definite temperature. Water is a polar solvent; therefore, an organic molecule that will also dissolve in water must be polar.

From the first pair, we have propane and propanol.

Propanol is more soluble in water than propane due to its polarity in water.

From the second pair:

Propanone is an alkanone (ketone group) with three carbon chain directly bonded to an oxygen double bond. At the same time, 3-hexanone has six carbon chain ketone group with the oxygen double bond located at the third carbon chain ( a hydrophobic "water-fearing" compound). Thus, the shorter the carbon chain, the more polar the organic molecule is and the more it is likely going to dissolve in water. Therefore, Propanone is more soluble in water than 3-hexanone.

From the third pair: The shorter the carbon chain, the more soluble in water it will become.

Butanal is the fourth element on the alkanal family group while hexanal is the sixth compound in the alkanal family group. As such, butanal is more soluble in water than hexanal.

Protons, electrons, and neutrons are the three subatomic particles that make up an atom, according to the findings of the Rutherford experiment.

He came at the conclusion that an atom's entire positive charge and nearly all of its mass are concentrated in a small area, with the majority of the remaining space being empty. The region of concentrated positive charge was referred to as the nucleus by Rutherford.

Rutherford's gold foil experiment proved that an atom is mostly empty space with a tiny, dense, positively-charged nucleus. These observations led Rutherford to propose the nuclear theory of the atom.

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In 4.38 × 10^21 molecules of water, there are approximately 0.073 moles.

To calculate the number of moles, we can use Avogadro's number, which states that 1 mole of a substance contains 6.022 × 10^23 molecules. So, by dividing the given number of molecules (4.38 × 10^21) by Avogadro's number, we can find the number of moles.

Now, let's explain the process in detail. Avogadro's number is a constant that represents the number of particles (atoms, molecules, etc.) in one mole of a substance. It is approximately 6.022 × 10^23. Therefore, if we divide the given number of molecules by Avogadro's number, we can determine the number of moles.

In this case, we divide 4.38 × 10^21 molecules by 6.022 × 10^23 molecules/mole, resulting in approximately 0.073 moles.

Significant figures play an important role in reporting the answer. The given number of molecules has three significant figures (4, 3, and 8), so our answer should be reported with three significant figures as well. Therefore, the number of moles is approximately 0.073.

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The total kilojoules in two tablespoons is  836.8 kJ.

To determine the total kilojoules in two tablespoons of a substance, we need to know the specific substance and its energy content per tablespoon. Different substances have different energy values, so without this information, it is not possible to provide an accurate calculation.

The energy content of food or substances is typically measured in kilocalories (kcal) or kilojoules (kJ). 1 kilocalorie is equal to 4.184 kilojoules. The energy content of a substance is often listed on food labels or in nutritional databases.

For example, if we have the energy content of a substance as 100 kilocalories (kcal) per tablespoon, we can convert it to kilojoules by multiplying it by 4.184:

100 kcal * 4.184 kJ/kcal = 418.4 kJ

So, if we have two tablespoons of this substance, the total energy would be:

418.4 kJ/tablespoon * 2 tablespoons = 836.8 kJ

It's important to note that the energy content of a substance can vary depending on its composition, density, and other factors. Therefore, it is always recommended to refer to reliable sources such as food labels, nutritional databases, or consult a qualified professional to obtain accurate information regarding the energy content of specific substances.

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Answer:

human can see visible light

Answer:

i beleive it is D. visible light

Explanation:

if im wrong sorry this subject isnt my forte

The rate of a multistep reaction is the rate of the slowest step. Here, the slow step is the last one. Hence, the rate law can be expressed as : r = k [A₂] [B].

The rate of a reaction is the rate of disappearance of the reactants or rate of appearance of the products. The rate is directly proportional to the concentration of the reactants.

For a first order reaction:

rate = k [A]

where, k is the rate constant and [A] is the molar concentration of the reactant A.

.

For a multistep reaction the rate of the whole reaction  is the rate of the slowest step. Because, the reaction will only complete after the completion of the slower step.

Here, the slower step is :

\(\rm A _{2} + B \rightarrow A_{2}B\)

Hence, the rate law can be written as:

r = k [A₂] [B].

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Answer:

0.625g/mL

Explanation:

D=mass (grams) / Volume (mL or cm^3)

m=125g
V=200mL

D= 125g/200mL= 0.625g/mL

Answer:24435

Explanation w49439r chusb

Answer:

yes.it depends on acceleration due to gravity,weight .

Answer:

The waters' temp increased

Explanation:

The temperature of the water in the swimming pool has increased due to the heat from the Sun. As a result, the particles in the water are moving faster and have a higher kinetic energy than in the morning.

Answer:

C). Electronegativity.

Explanation:

'Electronegativity' is described as the tendency or a measure of the ability of an atom or molecule to attract electrons that leads to the formation of chemical bonds. It is denoted by 'χ', a Greek letter. The elements like Fluorine having a very high rate of electronegativity, its atom would attract the electrons more strongly while the elements with lesser electronegativity like Cesium would possess a lesser tendency to attract electrons towards it in order to form a bond. Thus, option C is the correct answer.

Answer: D.

Explanation:

Asexual reproduction requires only one parent, making it more efficient and take a shorter amount of time than sexual reproduction.

Answer:

Most similar- oxygen

Least similar- sodium

Explanation:

The complete question is shown in the image attached.

Now let us consider all the options in the questions carefully. We do know that hydrogen forms  covalent bonds with sulphur. Two hydrogen atoms form form two polar covalent bonds with one sulphur atom. The molecule is bent owing to the presence of two lone pairs of electrons on the sulphur central atom.

Oxygen is in the same group as sulphur in the periodic table. The compound between hydrogen and sulphur is strikingly similar to the compound formed between sulphur and hydrogen due to chemical similarity of compounds of elements in the same group of the periodic table. Hence H2O bears the greatest similarity to H2S.

The bond between hydrogen and halogens is also polar covalent but less similar to the bond between sulphur and hydrogen.

Lastly, the bond between hydrogen and sodium is ionic and least similar to the bond between hydrogen and sulpur. We actually have in that compound, Na^+ H^-. Sodium transfers one electron to hydrogen as is implied in the ionic formula shown.

Hence the answer above.