Gizmo Warm-up Like an unpopped kernel in the microwave, a radioactive atom can change at any time. Radioactive atoms change by emitting radiation in the form of tiny particles and/or energy. This process, called decay, causes the radioactive atom to change into a stable daughter atom. The Half-life Gizmo allows you to observe and measure the decay of a radioactive substance. Be sure the sound is turned on and click Play

The question is incomplete, the complete question is;

Solid phosphorus and chlorine gas react to form solid phosphorus pentachloride. Suppose you have 9.0 mol of P and 2.0 of Cl2 in a reactor. Calculate the largest amount of PCl5 that could be produced. Round your answer to the nearest 0.1 mol.

Answer:

0.8 mols

Explanation:

The equation of the reaction is:

P4(s)+10Cl2(g)→4PCl5(g)

We have to determine the limiting reactant by considering the reactant that yields the least number of moles of product.

1 mole of P yields 4 moles of PCl5

then 9.0 moles of P yields 9.0 * 4/ 1 = 36 moles of PCl5

Secondly;

10 moles of chlorine gas yields 4 moles of PCl5

2 moles of chlorine gas yields 2 *4/10 = 0.8 moles of PCl5

Since chlorine gas is the limiting reactant, the largest amount of PCl5 that can be produced in the reactor is 0.8 mols

The largest amount of PCl₅ that can be produced from the reaction is 0.8 mole

We'll begin by determining the limiting reactant.

P₄ + 10Cl₂ —> 4PCl₅

1 : 10

9 : 2

From the above, Cl₂ is the limiting reactant as little amount is available for the reaction.

From the balanced equation above,

10 moles of Cl₂ reacted to produce 4 moles of PCl₅.

Therefore,

2 moles of Cl₂ will react to produce = (2 × 4)/10 = 0.8 mole of PCl₅.

Thus, the largest amount of PCl₅ produced from the reaction is 0.8 mole

Compete Question

Solid phosphorus and chlorine gas react to form solid phosphorus pentachloride. Suppose you have 9.0 mol of P and 2.0 of Cl2 in a reactor. Calculate the largest amount of PCl5 that could be produced. Round your answer to the nearest 0.1 mol.

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The question requires us to calculate the molar concentration of an acetic acid solution, given that it was necessary 36.4 mL of a 0.100 M NaOH solution to neutralize 50.0 mL of the acid.

The following information was provided by the question:

concentration of NaOH solution = C(OH-) = 0.100 M

volume of NaOH solution = V(OH-) = 36.4 mL

volume of CH3COOH solution = V(H+) = 50.0 mL

Acetic acid (CH3COOH) and sodium hydroxide (NaOH) react according to the following reaction:

Considering that at the equivalent point the number of moles of acid (H+) is the same as the number of moles of base (OH-) and taking the stoichiometry of the reaction into consideratio (1 : 1), we can write:

We can also write the number of moles of a compound (n) in terms of its molar concentration and volume:

Thus, considering the equivalent point, we can say:

Now, we can apply the values of volume and concentration provided by the question to the equation above and obtain the concentration of the acid:

Therefore, the molar concentration of the acetic acid solution is 0.0728 M and the best option to answer this question is the third one.

Answer:

A water molecule is made up of two hydrogen atoms and one oxygen atom. A single oxygen atom contains six electrons in its outer shell, which can hold a total of eight electrons. When two hydrogen atoms are bound to an oxygen atom, the outer electron shell of oxygen is filled.

Explanation:

Water has millions of molecules of liquid....Clear liquid, So that's how I came up with my answer...

Because it's the molecule.

And the way it's said is H2O.

Answer:

Cd(s) + CuSO4(aq) = Cu(s) + CuSO4(aq)

Explanation:

cadmium metal is a solid, so it will be labeled as Cd(s)

"reacts with a" means it is adding something: so the symbol will be "+"

copper (ll) sulfate is CuSO4, and "solution of" means it is aqueous "aq"

"to produce" means it is creating something, so instead of the "=" it would be an arrow

pure copper is labeled as Cu, and it is a solid

it repeats "solution of cadmium (II) sulfate" so it becomes CuSO4(aq)

Answer: The answer is incus

The molecular weight of the ascorbic acid (vitamin C), given that 0.9 g of the acid was dissolved in 95 g of water is 170.7 g/mol

We'll begin by obtaining the mole of the ascorbic acid in the solution. Details below

Mole = Molality × mass of water (in kg)

Mole of ascorbic acid = 0.0555 × 0.095

Mole of ascorbic acid = 0.0052725 mole

Finally, we shall determine the molar mass of the ascorbic acid. Details below

Molar mass = mass / mole

Molar mass of ascorbic acid = 0.9 / 0.0052725

Molar mass of ascorbic acid = 170.7 g/mol

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Answer:

The electron is the lightest stable subatomic particle known. It carries a negative charge which is considered the basic charge of electricity. An electron is nearly massless.

Answer:

Chemical equations show the ending outcome, while Chemical formulas only show how you lead up to it.

Explanation:

1) It means that the wine is 15 ABV (alcohol by volume) or the ethanol in the wine solution is 15 % v/v. It has 15 ml of pure ethanol in 100 ml of wine.

2) If in 100 mL of wine we have 15 mL of alcohol, we can use that relationship to find the volume of alcohol in 1 L.

Concentration of ethanol = 15 ml of ethanol/100 mL of wine = 15 ml of ethanol/0.10 L of wine

Volume of ethanol = 1 L of wine * 15 ml of ethanol/(0.10 L of wine)

Volume of ethanol = 150 mL

3) We know that the density is 0.8 g/cm³ or 0.8 g/mL

Density = mass/volume

mass of ethanol = density of ethanol * volume of ethanol

mass of ethanol = 0.8 g/mL * 150 mL

mass of ethanol = 120 g

4) The fermentation reaction that is used to produce etanol in wine is this one:

glucose ---> ethanol + carbon dioxide

C₆H₁₂O₆ ------> 2 C₂H₅OH + 2 CO₂

The first step to find the answer is to convert the mass of ethanol into moles of it using the molar mass.

atomic mass of C = 12.01 amu

atomic mass of H = 1.01 amu

atomic mass of O = 16.00 amu

molar mass of ethanol = 2 * 12.01 + 6 * 1.01 + 1 * 16.00

molar mass of ethanol = 46.08 g/mol

moles of ethanol = mass of ethanol /(molar mass of ethanol)

moles of ethanol = 120 g/(46.08 g/mol)

moles of ethanol = 2.60 moles

Let's consider the % yield.

% yield = actual moles of ethanol/(theoretical moles of ethanol) * 100

theoretical moles of ethanol = actual moles of ethanol/(% yield) * 100

theoretical moles of ethanol = 2.60 moles/75 * 100

theoretical moles of ethanol = 3.47 moles

C₆H₁₂O₆ ------> 2 C₂H₅OH + 2 CO₂

According to the equation of the reaction 2 moles of ethanol are produced by 1 mol of glucose. We will use that conversion to find the moles of glucose necessary to produce 3.47 moles of ethanol.

moles of glucose = 3.47 moles of C₂H₅OH * 1 mol of C₆H₁₂O₆/(2 moles of C₂H₅OH)

moles of glucose = 1.735 moles

And finally we can convert those moles into grams using the molar mass of glucose (C₆H₁₂O₆).

atomic mass of C = 12.01 amu

atomic mass of H = 1.01 amu

atomic mass of O = 16.00 amu

molar mass of glucose = 6 * 12.01 + 12 * 1.01 + 6 * 16.00

molar mass of glucose = 180.18 g/mol

mass of glucose = moles of glucose * molar mass of glucose

mass of glucose = 1.735 moles * 180.18 g/mol

mass of glucose = 313 g

Answer: 313 g of glucose should be used.

The statement is correct. The photoelectric effect refers to the phenomenon where electrons are ejected from the surface of a material when it is exposed to light. The frequency of light striking an electron in a metal must be above the threshold frequency in order for the photoelectric effect to occur.

The statement is correct. The photoelectric effect refers to the phenomenon where electrons are ejected from the surface of a material when it is exposed to light. However, for the photoelectric effect to occur, the frequency of the incident light must be above a certain threshold frequency.

The threshold frequency is the minimum frequency of light required to dislodge electrons from the material. Below this threshold frequency, regardless of the intensity or duration of the light, no electrons will be emitted.

This behavior can be explained by the particle-like nature of light, where light is composed of discrete packets of energy called photons. The energy of a photon is directly proportional to its frequency. Only photons with energy greater than or equal to the binding energy of the electrons in the material can dislodge them.

Therefore, the frequency of light striking an electron in a metal must be above the threshold frequency in order for the photoelectric effect to occur.

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Answer:

\({ \bf{PV = nRT}} \\ { \tt{(4.12 \times 3700) = 3.05 \times 0.083 \times T }} \\ { \tt{15244 = 0.25315 \: T}} \\ { \tt{T = 6.02 \times {10}^{4} \: kelvin }}\)

The temperature of the given gas is  60.95 K when it is occupying 3.70 L at 4.12 atm.

The ideal gas law can be described as a general equation of the state of an ideal gas. This equation gives the relationship between the volume and pressure of one-mole of gas equal to the multiplication of the universal gas constant and temperature.

The mathematical relationship can be shown for the ideal gas equation as:

PV = nRT

Where P is the pressure of the gas, n is the moles, V is the volume of the gas, and R is the gas constant.

Given, the volume of gas, V = 3.70 L

The  pressure of the given gas, P = 4.12 atm

The value of the gas constant, R =0.082 atmL/K mol

The number of moles of the given gas, n = 3.05 mol

Substitute the values V, R, P, and n in the ideal gas equation, and we get:

T = PV/nR

T = 4.12 × 3.70/(0.082 × 3.05)

T = 60.95 K

Therefore, the temperature of the given gas is  60.95 K.

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The effect of botulinum toxin cannot be determined using a yeast.

Botulinum toxin is produced by the bacterium called Clostridium botulinum. It is a neurotoxin that affects the nervous system. It is done by inhibiting a chemical called as acetylcholine.

Acetylcholine is a neurotransmitter that carries the message from the brain. It relays the message thus resulting in movement. If it is inhibited, the person would be paralyzed.

Yeast is a single-celled organism. It does not have well-developed systems as in multicellular organisms. In addition to that, the test organisms used to measure the effect of toxicity should be similar genetically to humans which would result in higher efficiency.

Thus, yeast cannot be used to determine the effect of botulinum toxin

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Answer:

ok, here is your answer

Explanation:

AI-generated answer

To find the mass of oxygen that reacted, we need to use the Law of Conservation of Mass, which states that in a chemical reaction, the mass of the reactants equals the mass of the products.

First, we need to find the number of moles of hydrogen that reacted:

Molar mass of hydrogen (H₂) = 2.016 g/mol

Number of moles of H₂ = mass/molar mass = 46.2 g/2.016 g/mol = 22.92 mol

Next, we need to use the balanced chemical equation to find the number of moles of water produced:

hydrogen + oxygen → water

2H₂ + O₂ → 2H₂O

From the equation, we can see that for every 2 moles of H₂, 1 mole of O₂ is required to produce 2 moles of H₂O. Therefore, the number of moles of O₂ required to produce 22.92 moles of H₂O is:

Number of moles of O₂ = 1/2 x 22.92 mol = 11.46 mol

Finally, we can find the mass of oxygen that reacted by using its molar mass:

Molar mass of oxygen (O₂) = 32.00 g/mol

Mass of oxygen = number of moles x molar mass = 11.46 mol x 32.00 g/mol = 366.72 g

Therefore, the mass of oxygen that reacted is 366.72 g.

Answer:

Water sweated by water from the leaf cells evaporating into the air, which pulls water and nutrients from the leaf into the air.

The theoretical yield of Fe is 335.1 g.

54.0 g of C is needed.

The volume of CO2 produced is 0.992 L.

198.05 g of CO2 was produced.

The percent yield of the reaction is 75.2%.

The balanced chemical equation for the reaction is:

2Fe2O3 + 3C → 4Fe + 3CO2

Using the equation, we can calculate the theoretical yield of Fe and the amount of C needed.

To calculate the theoretical yield of Fe:

Convert the given mass of Fe2O3 to moles:

480 g Fe2O3 x (1 mol Fe2O3/ 160 g Fe2O3) = 3.0 mol Fe2O3

Use stoichiometry to find the moles of Fe produced:

2 mol Fe2O3 → 4 mol Fe

3.0 mol Fe2O3 x (4 mol Fe / 2 mol Fe2O3) = 6.0 mol Fe

Convert moles of Fe to grams:

6.0 mol Fe x (55.85 g Fe / 1 mol Fe) = 335.1 g Fe

To calculate the amount of C needed:

Use stoichiometry to find the moles of C needed:

2 mol Fe2O3 → 3 mol C

3.0 mol Fe2O3 x (3 mol C / 2 mol Fe2O3) = 4.5 mol C

Convert moles of C to grams:

4.5 mol C x (12.01 g C / 1 mol C) = 54.0 g C

To find the volume of CO2 produced, we need to calculate the number of moles of CO2 produced using stoichiometry.

Use stoichiometry to find the moles of CO2 produced:

2 mol Fe2O3 → 3 mol CO2

3.0 mol Fe2O3 x (3 mol CO2 / 2 mol Fe2O3) = 4.5 mol CO2

Convert moles of CO2 to volume using the ideal gas law:

PV = nRT

V = nRT/P

V = (4.5 mol) (0.0821 L atm mol^-1 K^-1) (298 K) / (1 atm)

V = 0.992 L

To find the mass of CO2 produced:

Use the molar mass of CO2 to convert from moles to grams:

4.5 mol CO2 x (44.01 g CO2 / 1 mol CO2) = 198.05 g CO2

To calculate the percent yield of the reaction:

Use the given mass of Fe (252 g) and the theoretical yield of Fe (335.1 g) to calculate the percent yield:

Percent yield = (actual yield / theoretical yield) x 100%

Percent yield = (252 g / 335.1 g) x 100%

Percent yield = 75.2%

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A mixture can be defined as a physical blend of two or more substances that are not chemically combined.

They retain their own properties and can be separated by physical means like filtration, distillation, evaporation, or magnetism. The various types of mixtures include homogeneous mixtures, heterogeneous mixtures, and colloids.Homogeneous mixtures, also known as solutions, are uniform mixtures where the composition is the same throughout. They are not visibly different and consist of a solute (the substance being dissolved) and a solvent (the substance doing the dissolving). For example, salt water is a homogeneous mixture because the salt is dissolved uniformly throughout the water.Heterogeneous mixtures are non-uniform mixtures that consist of two or more phases, each with its own distinct properties. They can be seen with the eye, and the different components can be separated using physical means. An example of a heterogeneous mixture is oil and water. They can be mixed together, but they will eventually separate.Colloids are mixtures where the particle size is intermediate between that of a solution and a suspension. The particles are small enough to not be visible to the eye, but they are large enough to scatter light. Milk is an example of a colloid because it appears homogeneous but is actually made up of small particles of fat and protein dispersed throughout the liquid.In conclusion, a mixture is a physical blend of two or more substances that are not chemically combined. They can be separated by physical means and consist of homogeneous mixtures, heterogeneous mixtures, and colloids.

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The amount of energy required to heat 100 g of water is 268000 J.

Energy is the ability or the capacity to perform work.

To calculate the amount heat energy required to change the water to steam, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the amount of energy required is 268000 J.

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Answer:

The lid is successful and so is the handle. I dont think the thick glass would work out as good unless you only keep inside and the compartment cylinder is what made thier beverages taste different from what I think. 

Explanation:

Answer:

kinetic

Explanation:

hope this helps

Answer:

Kinetic energy

Explanation:

Answer:

The wax vapor starts to burn and creates the stable candle flame that you see. When you blew out the candle you should have seen white smoke rising up into the air from the wick. This is the wax vapor, which becomes visible as it condenses into small liquid droplets in the cooler air.

Explanation:

hope it helps

Answer:

This would be my answer and I hope this helps you.

observe that the flame is not touching the solid candle or the melted wax. It appears to be only touching the wick. I ask them if they think that the candle would burn as long if it were only the wick that was burning. What is the purpose of the wax? When the students place the first flame into the smoke of the second candle, they should see the second candle relight. It is not necessary to touch the wick in order for it to relight. This should lead them to conclude that it is the wax vapor that is burning.

When the students place the beaker containing the ice water above the candle, they should see condensation on the bottom of the beaker. If they hold it too close, they will not see the condensation and will see soot form. Students will usually recognize that the condensation is made of water, but they have difficulty recognizing that it comes from the combustion of the candle.

When the Erlenmeyer flask is placed over the top of the candle in the water, student should observe that the water candle goes out and the water rises. The students test the gas that was collected with phenol red solution (an acid-base indicator). They should observe that the solution changes from red to yellow. I demonstrate that this might indicate the formation of carbon dioxide by blowing through a straw into a solution of phenol red.

Explanation:

Hope this helped you!And thanks for inviting me to be your friend!(:

The assumption that accounts for the great compressibility of gases compared to liquids and solids is assumption 1: Gases are made up of molecules which are relatively far apart. Option A)

The assumption that accounts for the great compressibility of gases compared to liquids and solids is assumption 1: Gases are made up of molecules which are relatively far apart.

In gases, the molecules are widely spaced and have significant gaps between them. This allows gases to be easily compressed under pressure. When external pressure is applied to a gas, the molecules can be brought closer together, reducing the volume occupied by the gas. The gaps between the molecules provide room for compression, allowing gases to occupy a smaller volume.

In contrast, liquids and solids have molecules or particles that are closely packed together. The intermolecular forces in liquids and solids are stronger, limiting their compressibility. The molecules or particles are already in close proximity, leaving little room for further compression.

Therefore, the assumption that gases consist of molecules that are relatively far apart accounts for their greater compressibility compared to liquids and solids. Hence Option A) is correct.

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Answer:

The final temperature of the copper would be 311.3°C.

I hope this helps you

Answer:

d

Explanation:

The kind of weather front that would be responsible for the forecast given above is:
"Cooler temperatures and clear skies in 2 days."

A weather front in Meteorology refers to the zone where transition occurs between two different air masses a the surface of the earth. That is, you have warm air (which usually results in low pressures, and of course rain) and cold air.

Warm air creates rain because a warm mass of air will hold moisture collected from a large geographical space. This air cools as it rises, then eventually transits into precipitation - rain.

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The percent by mass of sulfur is  20.1%.

Here, we need to find the percent by mass of the sulfur atom and we have to do that by first obtaining the molar mass of the compound as we can see it from the question.

Hence;

Molar mass of the compound = 63.55 + 32.07 + 4( 16.00 )

=  63.55 + 32.07 + 64

= 159.62

We now have to find the percent by mas of sulfur;

32.07/159.62  * 100

= 20.1%

The compound contains 20.1% of sulfur by mass of the compound as shown in the calculation.

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Nothing can be inferred about  neutrons and electrons based on the results of the experiment.

The crux of the Rutherford experiment was the discovery of the planetary model of the atom. In his experiment, what he essentially did was to bombard a thin gold foil with alpha particles.

After the bombardment, he discovered that some of the alpha particles passed through the gold foil purely undeflected , some of the particles were deflected through large angles while yet some of  the alpha particles were bounced back.

On the basis of the observation, he opined that the atom has a central portion which contains a particle that is largely massive and caused the effects observed with the alpha particles. These results show nothing about the neutrons and electrons.

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Answer:

-9.2 × 10⁴ J/mol

Explanation:

Step 1: Convert the temperatures to Kelvin

We will use the following expression.

K = °C + 273.15

T₁: K = 74.3°C + 273.15 = 347.5 K

T₂: K = 18.7°C + 273.15 = 291.9 K

Step 2: Convert the pressures to Pascal (SI unit)

We will use the conversion factor 760 mmHg = 101325 Pa.

P₁: 1.0 mmHg × 101325 Pa/760 mmHg = 1.3 × 10² Pa

P₂: 425 mmHg × 101325 Pa/760 mmHg = 5.67 × 10⁴ Pa

Step 3: Determine the heat of vaporization of diethyl ether

We will use Clausius–Clapeyron equation.

ln (P₂/P₁) = -ΔHvap/R × (1/T₂ - 1/T₁)

ln (5.67 × 10⁴ Pa/1.3 × 10² Pa) = -ΔHvap/(8.314 J/mol.K) × (1/291.9 K - 1/347.5 K)

ΔHvap = -9.2 × 10⁴ J/mol

Answer:

the feather

Explanation:

solids do not change shape

hi <3

the cloudiness is caused by the production of carbon dioxide

hope this helps :)

Answer:

Lime water is calcium hydroxide with formula

\({ \sf{Ca(OH)_2}}\)

when calcium hydroxide reacts with the gas [ carbon dioxide ]

\({ \sf{Ca(OH)_{2(aq)} + CO_{2(g)} → CaCO_{3(s)} + H_2O_{(l)}}}\)

Calcium carbonate is white cloudy precipitate