For the following reaction, 4.34 grams of sulfur dioxide are mixed with excess oxygen gas . The reaction yields 3.89 grams of sulfur trioxide .

sulfur dioxide ( g ) + oxygen ( g ) sulfur trioxide ( g )

What is the theoretical yield of sulfur trioxide ?
grams
What is the percent yield for this reaction ?

Answer: 1

Explanation: Lithium has a single electron in the second principal energy level, and so we say that lithium has one valence electron.

1 is correct

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D. a bond between two atoms that have equal electronegativities

Covalent bonds involve 2 atoms sharing electrons.

Covalent Bonds

There are 3 types of bonds: metallic, ionic, and covalent. Metallic bonds occur between 2 metals that exist in a "sea of electrons." Ionic bonds have high electronegativity differences and occur between a metal and a nonmetal. Finally, as stated above, covalent bonds occur when 2 atoms share their electrons. Covalent bonds usually occur between two nonmetals. However, there are 2 types of covalent bonds: polar and nonpolar.

Nonpolar Bonds

Both polar and nonpolar bonds involve the sharing of electrons; however, polar bonds share electrons unequally. This is caused by an electronegativity difference greater than 0.5. When two atoms have equal electronegativities, they share the electrons equally. This creates a nonpolar bond.  

The volume of the gold sample, given the theoretical density and the mass, is 1.23 ml

When given the theoretical density of a gold sample and the mass, you can use the formula for density to find the volume of the gold sample.

The volume for density is:

Density = Mass / Volume

Mass = 23. 82 g

Density = 19. 30 g / ml

The volume is:

19.30 = 23 .82 / Volume

Volume x 19. 30 = 23. 82

Volume = 23. 82 / 19. 30

= 1.23 ml

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The full question is:

A sample of gold has a mass of 23.82 g, given that the theoretical density is 19.30 g/ml, what is the volume of the gold sample?

The vapor pressure of the SiCl₄ in the mmHg at the 33.0 °C is the 312 mmHg.

The Clausius - Clapeyron equation is as :

ln ( P₂ / P₁ ) = ΔHvap / R ( 1 / T₁ - 1 / T₂ )

P₂ = P₁eˣ

Where,

The temperature, T₁  = 5.4 °C = 278.55 K

The temperature, T₂  = 33.0 °C= 306 K

The pressure, P₁ = 100 mmHg

ΔHvap is the heat of the vaporization = 30.2 kJ /mol = 30200 J/mol

The gas constant, R = 8.314 J / mol K

x = ΔHvap / R ( 1 / T₁ - 1 / T₂ )

x = 30200 / 8.314 ( 1/ 278.55 - 1/ 306 )

x = 1.05

P₂ = 100 \(e^{1.05}\)

P₂ = 312 mmHg

The vapor pressure of the  SiCl₄ is 312 mmHg.

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Answer : The mass percent of Al in the alloy is 85.9 %.

Explanation : Given,

Mass of sample of an alloy  = 1.1181 g

Mass of \(H_2\) = 0.1068 g

Molar mass of \(H_2\) = 2 g/mol

Molar mass of \(Al\) = 27 g/mol

First we have to calculate the moles of \(H_2\).

\(\text{Moles of }H_2=\frac{\text{Given mass }H_2}{\text{Molar mass }H_2}\)

\(\text{Moles of }H_2=\frac{0.1068g}{2g/mol}=0.0534mol\)

Now we have to calculate the moles of \(Al\)

The balanced chemical equation is:

\(2Al+2NaOH+6H_2O\rightarrow 2Na[Al(OH)_4]+3H_2\)

From the reaction, we conclude that

As, 3 moles of \(H_2\) produced from 2 moles of \(Al\)

So, 0.0534 mole of \(H_2\) produced from \(\frac{2}{3}\times 0.0534=0.0356\) mole of \(CaCl_2\)

Now we have to calculate the mass of \(Al\)

\(\text{ Mass of }Al=\text{ Moles of }Al\times \text{ Molar mass of }Al\)

\(\text{ Mass of }Al=(0.0356moles)\times (27g/mole)=0.9612g\)

Now we have to calculate the mass percent of Al in the alloy.

Mass percent of Al in alloy = \(\frac{\text{Mass of Al}}{\text{Mass of sample of an alloy}}\times 100\)

Mass percent of Al in alloy = \(\frac{0.9612g}{1.1181g}\times 100\)

Mass percent of Al in alloy = 85.9%

Therefore, the mass percent of Al in the alloy is 85.9 %.

Answer:48

Explanation:

Answer:  3. 0.125 X 10”23 molecules

Explanation:

Answer:

hi

Explanation:

Answer:

A since dormant volcanoes haven't erupted for a long time but are expected to erupt again in the future.

Explanation:

When the acidic byproduct of plaque tears away at the teeth's enamel, demineralization of the teeth takes place.

Thus, Mineral molecules like calcium and phosphate give enamel, which is made of minerals, a lot of its strength and hardness.

When a tooth experiences tooth decay, the minerals inside it start to wear away (thus the term "demineralization") and render the tooth's enamel permeable, which can occasionally result in cavities or other dental problems.

Although the definition of bone demineralization may make you nervous, it actually happens naturally throughout the course of a tooth's lifespan.

Thus, When the acidic byproduct of plaque tears away at the teeth's enamel, demineralization of the teeth takes place.

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Answer:

The correct answer is - yes, 4.57 g of solute per 100 ml of solution

Explanation:

The correct answer is yes we can calculate the solubility of X in the water at 22.0°C. The salt will remain after the evaporate from the dissolved and cooled down at 26°C.

Then, the amount of solute dissolved in the 700 ml solution at 26°C is the weighed precipitate: 0.032 kg = 32 g.

Then solublity will be :

32. g solute / 700 ml solution = y / 100 ml solution

⇒ y = 32. g solute × 100 ml solution / 700 ml solution = 4.57 g.

Thus, the answer is 4.57 g of solute per 100 ml of solution.

Answer:   m =  4.2 gAgCl

Explanation:  

Scientific theories explain why a phenomenon occurs and a scientific law explains what occurs. The correct option is A.

A scientific theory is an explanation for a phenomenon in the natural world or the universe that has undergone extensive testing and verification using approved procedures for observation, measurement, and result evaluation.

A scientific law often describes an observed phenomenon. It doesn't explain the phenomenon's existence or its origins.

A scientific theory is the explanation for a phenomenon. It is a myth that with enough study, theories can become laws.

Thus, the correct option is A.

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The volume of hydrogen gas collected over water is approximately 25.10 liters. We need to consider the stoichiometry of the reaction, the ideal gas law, and the partial pressure of hydrogen gas.

First, let's balance the equation for the reaction between magnesium (Mg) and hydrochloric acid (HCl):

Mg + 2HCl -> MgCl₂ + H₂

From the balanced equation, we can see that 1 mole of magnesium reacts to produce 1 mole of hydrogen gas.

1. Calculate the number of moles of magnesium (Mg):

Molar mass of Mg = 24.31 g/mol

Number of moles of Mg = Mass of Mg / Molar mass of Mg = 25.6 g / 24.31 g/mol = 1.054 mol

2. Calculate the number of moles of hydrogen gas (H₂):

Number of moles of H₂ = Number of moles of Mg = 1.054 mol

3. Apply the ideal gas law to calculate the volume of hydrogen gas (V₂):

PV = nRT

Given:

Pressure (P) = 785.4 torr

Temperature (T) = 36.5 °C = 36.5 + 273.15 K = 309.65 K

R = 0.0821 L·atm/(mol·K) (gas constant)

Number of moles (n) = 1.054 mol

Convert the pressure to atm:

785.4 torr = 785.4 torr * (1 atm / 760 torr) = 1.032 atm

Substituting the values into the ideal gas law equation:

V₂ = (nRT) / P = (1.054 mol * 0.0821 L·atm/(mol·K) * 309.65 K) / 1.032 atm ≈ 25.10 L

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Answer:

it's A. if the force of gravity is greater than the buoyant force, the object will sink.

Explanation:

just took the quiz on a p e x

Sally is wrong because copper is less electropositive than hydrogen, thus, can not displace hydrogen from dilute acids.

The reactions to prepare copper (ii) chloride are:

the chlo­ri­na­tion of cop­per sul­fide at a high tem­per­a­ture

reaction of copper (ii) oxide with dilute hydrochloric acid

The equations of the given reactions are as follows:CuS + Cl₂ ---> CuCl₂ + SCuO + 2HCl ----> CuCl₂ + H₂O

Reactive metals are metals that readily give up their electrons to form positive ions.

Reactive metals displace hydrogen from dilute acids. They are found in group 1A and 2A of the periodic table. Copper is not a reactive metal and will not displace hydrogen from acids.

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Sally is wrong because copper chloride is not made from the reaction of copper and dilute hydrochloric acid.

2. Copper (ii) chloride can be prepared as follows:

3. the equations of the reaction are:

Single replacement reactions are reactions in which a more reactive atom replaces another atom in a compound.

An example of a single replacement reaction is the reaction of chlorine gas with copper sulfide at high temperatures to form copper chloride.

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Answer:

Cu^2+(aq) + CO3^2-(aq) ⟶ CuCO3(s)

Explanation:

The balanced chemical equation for the given reaction is:

Cu(ClO4)2(aq) + Na2CO3(aq) ⟶ CuCO3(s) + 2NaClO4(aq)

We first need to identify the spectator ions to write the net ionic equation. These are ions that appear on both sides of the equation and do not participate in the reaction. In this case, the spectator ions are Cu^2+ and ClO4^-, as they appear unchanged on both sides.

The net ionic equation is obtained by removing the spectator ions from the balanced equation. Therefore, the net ionic equation for this reaction is:

Cu^2+(aq) + CO3^2-(aq) ⟶ CuCO3(s)

Note that Na+ and ClO4^- are not included in the net ionic equation because they do not participate in the formation of the solid product (CuCO3).

Answer:

\($10.97 \ g/cm^3$\)

Explanation:

Given :

Mass of a bar of lead = 115.2 g

Initial water level \($\text{in the graduated cylinder}$\) = 25 mL

Final water level \($\text{in the graduated cylinder}$\) = 35.5 mL

Difference in the water level = 35.5 - 25

                                               = 10.5 mL

                                               = \(10.5 \ cm^3\)

We know that when a body is submerged in water, it displaces its own volume of water.

Therefore, the volume of the lead bar = volume of the water displaced = 10.5 mL  = \(10.5 \ cm^3\)

We know that mathematically, density is the ratio of mass of body to its volume.

Density of the lead bar is given by :

\($\rho =\frac{\text{mass}}{\text{volume}}$\)

\($\rho =\frac{\text{115.2 g}}{\text{10.5 cm}^3}$\)

  = \($10.97 \ g/cm^3$\)

Sulfanilamide (NH2-SO2-NH-C6H4-NH2) can be represented by the following Lewis structure.

What is the Lewis structure?

The Lewis structure for a molecule is a type of structural formula that shows how the atoms are bonded together in a molecule. It uses symbols to represent the elements and to show the number of valence electrons. It also shows the number of covalent bonds between the atoms and any lone pairs of electrons.

N-H  |  S=O  |  N-C=C-C=C-C=C-N

H   |       |   H

H   |       |   H

H   |       |   H

The Lewis structure of sulfanilamide (NH2-SO2-NH-C6H4-NH2) consists of two nitrogen atoms, two oxygen atoms, and six hydrogen atoms. The two nitrogen atoms are bonded to each other by a double bond, and each nitrogen is also bonded to two hydrogen atoms. The two oxygen atoms are both single bonded to the two nitrogen atoms, and each oxygen is also bonded to one hydrogen atom. The six hydrogen atoms are all single bonded to the other atoms in the structure.

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can't give an answer to your question if there isn't a picture or being specific in the question.

Answer: 2 Out of 4

Explanation:

Bc my mom told me

Answer: 7.505

×

10

22

atoms. (rounded to third place of decimal)

Explanation:

Answer:

1.714 M

Explanation:

We'll begin by calculating the number of mole in 46.8 g of NaHCO₃. This can be obtained as follow:

Mass of NaHCO₃ = 46.8 g

Molar mass of NaHCO₃ = 23 + 1 + 12 + (3×16)

= 23 + 1 + 12 + 48

= 84 g/mol

Mole of NaHCO₃ =?

Mole = mass / molar mass

Mole of NaHCO₃ = 46.8 / 84

Mole of NaHCO₃ = 0.557 mole

Next, we shall convert 325 mL to L. This can be obtained as follow:

1000 mL = 1 L

Therefore,

325 mL = 325 mL × 1 L / 1000 mL

325 mL = 0.325 L

Thus, 325 mL is equivalent to 0.325 L.

Finally, we shall determine the molarity of the solution. This can be obtained as shown below:

Mole of NaHCO₃ = 0.557 mole

Volume = 0.325 L

Molarity =?

Molarity = mole / Volume

Molarity = 0.557 / 0.325

Molarity = 1.714 M

Therefore the molarity of the solution is 1.714 M

Answer:

The pot is a closed system heat can escape, but matter cannot

Explanation:

Answer:

Investigating Energy Systems

Posible Subclaims:

The Hand-Crank Generator System does have energy.

or

The Hand-Crank Generator System does not have energy.

Evidence

The mass of KHP needed to neutralize 27.1 mL of a 0.247 M sodium hydroxide would be 1.364 grams.

To solve this problem, we will use the balanced chemical equation between potassium hydrogen phthalate (KHP) and sodium hydroxide (NaOH):

KHP + NaOH → NaKP + H2O

From this equation, we can see that one mole of KHP reacts with one mole of NaOH. Therefore, we can use the following equation to calculate the moles of KHP required to neutralize the given volume and concentration of NaOH:

moles of NaOH = concentration of NaOH × volume of NaOH

moles of KHP = moles of NaOH

mass of KHP = moles of KHP × molar mass of KHP

moles of NaOH = 0.247 M × 0.0271 L = 0.0066777 moles

Since the number of moles of KHP required to react with this amount of NaOH is the same, we have:

moles of KHP = 0.0066777 moles

The molar mass of KHP is 204.22 g/mol, so we can calculate the mass of KHP required:

mass of KHP = 0.0066777 moles × 204.22 g/mol = 1.364 g

Therefore, 1.364 grams of KHP are needed to exactly neutralize 27.1 mL of a 0.247 M sodium hydroxide solution.

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The current passing through the electrolytic cell is approximately 2.02 x 10^4 Amperes.

To calculate the current in amperes, we need to use Faraday's laws of electrolysis and the stoichiometry of the reaction.

Faraday's laws state that the amount of substance produced or consumed during electrolysis is directly proportional to the quantity of electricity passed through the cell. The relationship is given by:

Q = nF

Where Q is the electric charge in coulombs (C), n is the number of moles of substance involved in the reaction, and F is Faraday's constant, which is equal to 96,485 C/mol.

In this case, the substance being produced is Cl2, and we know the mass of Cl2 produced, which is 4.8 x 10^5 g.

First, we need to calculate the number of moles of Cl2 produced:

Molar mass of Cl2 = 35.45 g/mol

Moles of Cl2 = mass / molar mass = (4.8 x 10^5 g) / (35.45 g/mol) ≈ 1.354 x 10^4 mol

Now we can calculate the quantity of electricity passed through the cell using Faraday's laws:

Q = nF

Q = (\(1.354 x 10^4\)mol) * (96,485 C/mol)

Q ≈ 1.308 x 10^9 C

The quantity of electricity is given in coulombs. To find the current, we need to divide this value by the time in seconds.

Given that the time is 18 hours, we convert it to seconds:

Time = 18 hours * 60 minutes/hour * 60 seconds/minute

Time = 6.48 x 10^4 seconds

Finally, we can calculate the current:

Current (I) = Q / Time

I = (1.308 x 10^9 C) / (6.48 x 10^4 s)

I ≈ 2.02 x 10^4 Amperes

Therefore, the current passing through the electrolytic cell is approximately 2.02 x 10^4 Amperes.

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When investigative officers get to a crime scene, they do not need to collect water samples.

A crime scene is a place where an offence has been committed. It is usually cordoned off to enable investigation of the crime and the collection of samples.

When investigative officers get to a crime scene, they do not need to collect water samples.

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Answer:A

Explanation:.

472.7ml of a .5500 M solution of NaI are needed to produce 34.81mg of I\(_2\) in the reaction COCl\(_2\)+2NaI  → 2NaCl+CO+I\(_2\).

A measurement of three-dimensional space is volume. Several imperial or US customary units, as well as SI-derived units (such the cubic meter and liter), are frequently used to quantify it quantitatively. Volume and length (cubed) have a symbiotic relationship.

COCl\(_2\)+2NaI  → 2NaCl+CO+I\(_2\)

number of moles of I\(_2\) =34.81/254=0.13moles

2 moles of NaI gives 1 moles of I\(_2\)

0.13moles are obtained by 2×0.13=0.26moles of NaI

0.550moles of I\(_2\) is present in 1000ml

0.26moles of I\(_2\) is present in (1000/0.55)×0.26=472.7ml

Therefore, 472.7ml of a .5500 M solution of NaI are needed to produce 34.81mg of I\(_2\).

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Answer:

39.099 amu

Explanation:

saw this on quizlet no cap sorry im 3 weeks late