if 25.0g of AI and 100.00 grams of Br2 are reacted and 64.2 of AIBr3 product is recovered what is the percent yield for the reaction

The new concentration of the KCl solution after mixing 1 L new volume is 0.28 M.

Concentration in terms of molarity will be calculated by using the below equation as:

M₁V₁ = M₂V₂, where

M₁ = molarity of old KCl solution = 1.6 M

V₁ = volume of old KCl solution = 175 mL = 0.175 L

M₂ = molarity of new KCl solution = ?

V₂ = volume of new KCl solution = 1 L

On putting all these values on the above equation, we get

M₂ = (1.6)(0.175) / (1) = 0.28 M

Hence resultant concentration is 0.28 M.

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Answer: Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. When the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere.

It's impossible for it to be summer and winter in the same hemisphere because the southern and northern hemispheres have their seasons inverted. For example; when it is summer in the US it is winter in Australia.

Hope this helps :)

The correct statement concerning the given balanced chemical equation is If we have more mass of C₂H₂, then O₂ must be limiting. The correct option is d.

To determine the limiting reactant in a chemical reaction, we compare the stoichiometry of the balanced equation to the amounts of reactants available. The limiting reactant is the one that is completely consumed, thereby limiting the amount of product formed.

In the given balanced chemical equation:

2C₂H₂(g) + 7O₂(g) → 6H₂O(l) + 4CO₂(g)

We can analyze the equation to determine the relationship between C₂H₂ and O₂.

From the coefficients of the balanced equation, we see that 2 moles of C₂H₂ react with 7 moles of O₂. This means that the stoichiometric ratio between C₂H₂ and O₂ is 2:7.

If we have more mass of C₂H₂, it means we have an excess amount of C₂H₂ compared to the stoichiometric ratio. In this case, C₂H₂ will be the excess reactant, and O₂ will be the limiting reactant. The excess C₂H₂ will not be completely consumed, and the reaction will be limited by the availability of O₂.

Therefore, the correct statement is d. If we have more mass of C₂H₂, then O₂ must be limiting. This is because the stoichiometry of the balanced equation indicates that a larger amount of C₂H₂ requires a corresponding larger amount of O₂ to be completely consumed. Option d. is the correct answer.

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Answer:

C₃H₅N₃O₉

Explanation:

Molar mass of nitroglycerin (Ratio of mass and moles of the compound) is:

1.00g / 0.0041mol = 226.8g/mol

We can write the equations:

0.6H = C (1)

-60% as many carbon atoms as hydrogen atoms-

3N = O (2)

C = N

Using as basis the atoms of Carbon:

Carbon = 1

Nitrogen = 1

Oxygen = 3

Hydrogen = 1/0.6 = 1.67

A molecular formula has just whole numbers. This ratio of atoms times 3:

Carbon = 3

Nitrogen = 3

Oxygen = 9

Hydrogen = 5

C₃H₅N₃O₉. Molar mass of this formula is:

C = 12.01g/mol*3 = 36.03g/mol

H = 1.01g/mol*5 = 5.05g/mol

N = 14g/mol*3 = 42g/mol

O = 16g/mol*9 = 144g/mol

Molar mass:

36.03g/mol + 5.05g/mol + 42g/mol + 144g/mol = 227g/mol ≈ 226.8g/mol

That means molecular formula of nitroglycerin is:

The molecular formula of nitroglycerin is C₃H₅O₉N₃

Mass of nitroglycerin = 1.00 g

A number of moles of nitroglycerin =  0.0041 mol

It is required to calculate the molecular formula of nitroglycerin.

An empirical formula tells us the relative ratios of different atoms in a compound.

The molecular formula of nitroglycerin can be estimated with the help of empirical formula.

The molar mass of nitroglycerin (Ratio of mass and moles of the compound) is:

1.00g / 0.0041mol = 226.8 g/mol

We can write the equations:

0.6H = C (1)

-60% as many carbon atoms as hydrogen atoms-

3N = O (2)

C = N

Using as basis the atoms of Carbon:

Carbon = 1

Nitrogen = 1

Oxygen = 3

Hydrogen = 1/0.6 = 1.67

A molecular formula has just whole numbers. This ratio of atoms times 3:

Carbon = 3

Nitrogen = 3

Oxygen = 9

Hydrogen = 5

C₃H₅N₃O₉.

Molar mass of this formula is:

C = 12.01g/mol*3 = 36.03g/mol

H = 1.01g/mol*5 = 5.05g/mol

N = 14g/mol*3 = 42g/mol

O = 16g/mol*9 = 144g/mol

Molar mass:

36.03g/mol + 5.05g/mol + 42g/mol + 144g/mol = 227g/mol ≈ 226.8g/mol

That means molecular formula of nitroglycerin is:

C₃H₅N₃O₉

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The rate of evaporation of water from the pan is approximately 0.000498 g/s.

The rate of evaporation of water from the pan is calculated as follows:

The thermal resistance is calculated first using the formula:

R = thickness / thermal conductivity

For the steel layer:

R_steel = 0.310 cm / (46.0 W/(m⋅K) * 0.01 m/cm) = 0.6739 K/(W⋅m²)

For the copper layer:

R_copper = 0.150 cm / (401 W/(m⋅K) * 0.01 m/cm) = 0.0374 K/(W⋅m²)

Overall thermal resistance (R_total):

R_total = R_steel + R_copper

R_total = 0.6739 + 0.0374

R_total = 0.7113 K/(W⋅m²)

The heat transfer rate (Q) from the ceramic heating element to the water will be:

Q = (T_ceramic - T_water) / R_total

where:

T_ceramic is the temperature of the ceramic heating element (132°C),

T_water is the temperature of the water (100.00°C), and

R_total is the overall thermal resistance.

Q = (132°C - 100.00°C) / 0.7113 K/(W⋅m²) = 44.971 W/m²

The surface area (A) of the stainless steel-copper base:

A = πr²

r = 18.0 cm / 2

r = 9.0 cm or 0.09 m

Thus;

A = π * 0.09²

A = 0.025434 m²

The rate of water evaporation (E) is then calculated as folows:

E = Q / Lv

Lv, the latent heat of vaporization for water is 2256 J/g:

E = (44.971 W/m² * 0.025434 m²) / (2256 J/g * 1000 g/kg)

E ≈ 0.000498 g/s

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Answer:

Carbon 16

Explanation:

Isotope of nitrogen

Answer:

The number of elements in a compound is counted by identifying and counting the chemical symbols represented in the chemical formula

A compound is a substance that is a mixture of more than one elements.

Compounds are made of two or more elements. These elements are represented by their symbols. These symbols can be identified and the number of elements represented by these symbols are counted.

For example, in the compound H_2OH

2

O :

H represents Hydrogen

O represents Oxygen

The elements in Water ( H_2OH

2

O ) are Hydrogen and Oxygen

Therefore, the number of elements in H_2OH

2

O is 2

Also in, NaClNaCl

The elements are Sodium(Na) and Chlorine(Cl)

There are two elements in NaCl

Hence, the number of elements in a compound is counted by identifying and counting the chemical symbols represented in the chemical formula

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The heat required to melt 23.9 g of diethyl ether at its melting point is 2.34 kJ.

To calculate the heat required to melt diethyl ether \((C_4H_{10}O)\) at its melting point:

Q = n × ΔHfus

where Q = heat required, n = number of moles of diethyl ether, and ΔHfus = enthalpy of fusion of diethyl ether (in kJ/mol).

First, we need to calculate the number of moles of diethyl ether:

molar mass of \(C_4H_{10}O\) = 74.12 g/mol

moles = mass/molar mass = 23.9 g / 74.12 g/mol = 0.322 mol

Next, we can use the given enthalpy of fusion to calculate the heat required:

Q = n × ΔHfus = 0.322 mol × 7.27 kJ/mol = 2.34 kJ

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ANSWER

Option C

EXPLANATION

Given that;

In the reaction above, we have the following data

At the reactants side;

3 atoms of manganese

4 atoms of nitrogen

1 atom of sodium

1 atom of fluorine

At the products side

1 atom of manganese

4 atoms of fluorine

3 atoms of sodium

1 atom of nitrogen

To balance the above equation, apply the law of conservation mass

Law of conservation of mass states that matter can neither be created nor destroyed but can e transformed from one formato another.

To balance the equation, 1 mole of Mn3N4 reacts with 12 moles of Na Tto give 3 moles of MnF4 and 4 moles of Na3N

So, the new equation becomes

The following data can be deduced in the above equation

At the reactants side

3 atoms of Mn

4 atoms of N

12 atoms of Na

12 atoms of F

At the products side

3 atoms of Mn

12 atoms of F

12 atoms of Na

4 atoms of N

Looking atthe vabove data, the number of atoms of each element at the reactants side is equal to the number of atoms of same elements at the products side.

Hence, the correct answer is option Ce

u

Answer:

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Answer:

A compound because it cannot be found on the periodic table

Explanation:

Answer:

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Answer:

80 N

Explanation:

you can multiple

force equal to mass x gravity

Answer:

Directly & Pressure

Explanation:

Oumm...I don't know if it's right but correct me if I'm wrong

As the helium balloon ascends, its temperature decreases from 303 K to 271 K while maintaining a constant pressure. When the balloon ascends into the atmosphere and the temperature lowers to 271 K, its new volume will be equivalent to about 34.99 liters.

To determine the new volume of the balloon, we can use the combined gas law equation:

\(\(\frac{{P_1V_1}}{{T_1}} = \frac{{P_2V_2}}{{T_2}}\)\)

Where:

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure (remains constant)

V₂ = Final volume (to be determined)

T₂ = Final temperature

Given:

P₁ = P₂ (pressure remains constant)

V₁ = 39.2 L

T₁ = 303 K

T₂ = 271 K

Plugging in the values into the equation, we have:

\(\(\frac{{P_1 \cdot V_1}}{{T_1}} = \frac{{P_2 \cdot V_2}}{{T_2}}\)\)

Since P₁ = P₂, we can simplify the equation:

\(\(\frac{{V_1}}{{T_1}} = \frac{{V_2}}{{T_2}}\)\)

Now we can rearrange the equation to solve for V₂:

\(\(V_2 = \frac{{V_1 \cdot T_2}}{{T_1}}\)\)

Substituting the given values:

\(V_2 = \frac{{39.2 \, \text{L} \cdot 271 \, \text{K}}}{{303 \, \text{K}}}\)

Calculating this expression:

V₂ ≈ 34.99 L

Therefore, the new volume of the balloon, when it rises into the atmosphere and the temperature drops to 271 K, will be approximately 34.99 liters.

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Explanation:

Fermentation: When yeast is added to the dough, it begins to ferment the sugars present in the dough, producing carbon dioxide and ethanol. The carbon dioxide helps to leaven the dough, while the ethanol is mostly evaporated during baking.

Maillard reaction: During baking, the heat causes a reaction between the amino acids and sugars in the dough, producing a wide range of compounds that give bread its characteristic flavor and aroma. This reaction is known as the Maillard reaction.

Protein denaturation: The heat of baking causes the proteins in the dough to denature, or lose their native conformation. This helps to give bread its texture and structure, and also contributes to the development of its crust.

Answer:

The kinetic energy of an object is also measured in joules. Anything that is moving has kinetic energy, but various factors affect how much kinetic energy an object has. The first factor is speed. If two identical objects are moving at different speeds, the faster object has more kinetic energy.  In physics, the kinetic energy  of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body when decelerating from its current speed to a state of rest.

Explanation:

Answer: Potential energy is a little different. It is the energy an object has the potential to create. The energy produced is determined similarly to kinetic. It depends on the object's mass, the gravitational pull when up or down slopes, and the height of the reference point.

another explanation:

a) Potential Energy:

mass and height

We know that potential energy, PE is equal to the product of the mass, the gravitational acceleration and the height.

Since gravity is constant, the mass and height are the factors.

b) Kinetic Energy:

The mass (m) of the object and the speed (v) of the object.

Because kinetic energy is proportional to the velocity squared, increases in velocity will have an exponentially greater effect on transitional kinetic energy. Doubling the mass of an object will only double its kinetic energy, but doubling the velocity of the object will quadruple its velocity.

Answer:

74 litre

Explanation:

using ideal gas eqation PV=nRT

here P(pressure)=81.8 kPa =81.8×10^3 Pa

moles=2.5

temperature=273.15+18=291.15K

Gas constant R=8.314m^3-Pa/K-mol

now, V=nRT/P = 8.314×2.5×291.5/81.8×10^3 ≈74litre

✌️;)

Answer:

Thermal Energy is a certain type of energy that Heats.

Explanation:

"Thermal" is derived from "Thermo" which means heat.

Answer:

GOT YOU

Explanation:

Jotun (pollinator)

Norse(decomposer)

Its a point and click adventure game. Where you only have specific actions you can do with your mouse. The basic options are Inspect for notes or Pollinate pollinate the right plants to escape. Your goal and how to win is go through each level picking up the plants to pollinate leave the level. The only way to lose is if you are unable to find the right plants by a set amount of time. The story is your wife has been taken prisoner by Norse and you are alerted by this from a note. You go to a location and find a tower once you walk in the doors shut behind you and a screen appears saying "Get out of the room and to the top of the tower in an hour or she dies. Jotun escapes and gets to the top of the tower to find out his wife died long ago and Norse has been using her for food.

The chemical equation of the production of ammonia is shown in figure 1 and it shows that the mole ratio for ammonia and nitrogen gas is 2:1.

What is mole ratio?

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Answer:

idc

Explanation:

idc looooooooooool

Answer:

It is possible she could get one.

Explanation:

To solve this problem we need to convert 98.3 kilometers/hour to miles/hour.

In other words, we convert km to mi, to do so we multiply 98.3 km by a conversion factor, putting the unit we want to have in the numerator, and the unit we want to convert in the denominator:

Given that the little old lady is doing 61 miles/hour, she could get a speeding ticket.

[Ar]4s23d6 the electron configuration of the metal ion in Fe(NO3)3.

The noble gas krypton, which is isoelectronic with As arsenic 3 ion (As3), is isoelectronic with [Ar]3d104s2sp6 because it has gained three electrons.

Transition-metal ions are frequently referred to as having dn configurations because their valence electrons are mostly found in d orbitals. For instance, it is claimed that the Co3+ and Fe2+ ions have a d6 configuration.

The number of protons in the atomic nuclei of arsenic, abbreviated As, is 33. 33 electrons would likewise be present in a neutral As atom.

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Answer:

induced-dipole induced dipole forces.

Explanation:

The cat will be 367.72 centifingers tall.

1 finger = 3.1 inches

Recall that: centi =  \(10^-^2\)

Thus, 1 centifinger = \(10^-^2\) finger

The cat is 11.4 inches tall.

If 1 finger = 3.1 inches

Then, how many fingers will make 11.4 inches?

= 11.4 x 1/3.1 = 3.6772 fingers

3.6772 fingers = 3.6772 x  \(10^2\) centifinger

                          = 367.72 centifingers

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The mass (in grams) of the silicon present in the computer chip is 2.19 g

From Avogadro's hypothesis,

6.02×10²³ atoms = 1 mole of Si

But

1 mole of Si = 28 g

Thus, we can say that:

6.02×10²³ atoms = 28 g of Si

6.02×10²³ atoms = 28 g of Si

Therefore,

4.71×10²² atoms = (4.71×10²² × 28) / 6.02×10²³ g of Si

4.71×10²² atoms = 2.19 g of Si

Thus, the mass of silicon, Si present in the computer chip is 2.19 g

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Answer:

KBr

Explanation

KBr is an ionic compound which have very high BP since they exist as 3D crystals

Methyl Bromide, CH3Br.  is a covalent compound which have low BP since they exist as individual molecules

The minimum uncertainty in the energy of the excited state is approximately 0.206 eV.

According to the Heisenberg uncertainty principle, there is an inherent uncertainty in the measurement of certain pairs of physical properties, such as the position and momentum or the energy and time of a quantum system.

The uncertainty principle can be expressed mathematically as ΔE Δt ≥ ħ/2, where ΔE is the uncertainty in the energy of the system, Δt is the uncertainty in the time interval over which the energy is measured, and ħ is the reduced Planck constant.

In this case, the given time interval is Δt = 10^(-8) s. We can use this value to calculate the minimum uncertainty in the energy of the excited state:

ΔE Δt ≥ ħ/2

ΔE ≥ ħ/(2Δt)

ΔE ≥ (6.626 x 10⁻³⁴ J s)/(2 x 10⁻⁸ s)

ΔE ≥ 3.313 x 10⁻²⁶ J

To convert this energy uncertainty to eV, we can use the conversion factor 1 eV = 1.602 x 10⁻¹⁹ J:

ΔE = (3.313 x 10⁻²⁶ J) / (1.602 x 10⁻¹⁹ J/eV)

ΔE ≈ 0.206 eV

Therefore, the minimum uncertainty in the energy of the excited state is approximately 0.206 eV. This means that the energy of the excited state can fluctuate by up to this amount over the time interval Δt = 10⁻⁸ s.

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