How many moles of oxygen gas are necessary to completely react with 10.6 moles of propane? C3H8(g) + 5 O2(g) --> 3 CO2 (g) + 4 H2O (l)

Answer: There is a relationship between the electron configuration of an element and its resulting chemical/physical properties. Atoms of an element like to have a full octet of electrons in their valence shells. ... Other elements need to lose or gain electrons to obtain an octet.

:

Answer:

Troposphere

Explanation:

The troposphere is the lowest layer of Earth's atmosphere that extends from under the stratosphere down to the surface of the earth. Nearly all weather condition takes place in the troposphere. The troposphere contains about 75% of the atmosphere's mass and 99% of the total mass of water vapour and aerosols in the atmosphere.

Answer: Pressure decreases.

Explanation:

Atmospheric pressure is termed as the  downward force applied by the weight of air against a particular area on Earth's surface.  the Standard atmospheric pressure is determined  by weighing the column of air occupying  1 square inch on Earth's surface which begins  at sea level and moves  upward to the uppermost layer of the atmosphere

Measuring the Atmospheric pressure from sea level to the stratosphere,the second layer of the atmosphere which contains the most of the ozone gas show that the pressure decreases

Answer:

the first one

Explanation:

Answer:To find the number of CO2 molecules in a 0.25 g sample of dry ice, we can use the Avogadro's number and the molar mass of CO2.The molar mass of CO2 is:12.01 g/mol (C) + 2(16.00 g/mol) (O) = 44.01 g/molThis means that 1 mole of CO2 contains 6.022 x 10^23 molecules.To find the number of moles in 0.25 g of CO2, we can use the molar mass:0.25 g / 44.01 g/mol = 0.005681 molFinally, we can use Avogadro's number to find the number of CO2 molecules:0.005681 mol x 6.022 x 10^23 molecules/mol = 3.422 x 10^21 CO2 moleculesTherefore, a 0.25 g sample of dry ice contains approximately 3.422 x 10^21 CO2 molecules.

The density of a metal can be calculated in g/mL by water displacement. By using the given data, the density of a metal can be calculated as follows;

Mass of cylinder with water: 142.62 gramsMass of cylinder + water + metal: 197.90 gramsVolume of water before adding metal: 52.0 mLVolume of water in cylinder after adding metal: 77.0 mLTo calculate the density of metal, we can use the water displacement method. According to this method, when an object is added to a fluid (water in this case), the fluid's volume will increase due to the object's volume. Here, we have a metal that needs to be measured to calculate its density.

The density of a substance is its mass per unit volume. If we know its mass and volume, we can calculate its density. For this purpose, we have to measure the water's volume change when the metal is added to it. Here's how:Mass of water = mass of cylinder + water - mass of cylinder = 197.90 g - 142.62 g = 55.28 g Volume of metal

= volume of water displaced

= 77.0 mL - 52.0 mL

= 25.0 mLTherefore, the density of metal can be calculated as follows;Density of metal

= mass of metal / volume of metal Density of metal

= (197.90 g - 142.62 g) / 25.0 mL

= 2.204 g/mLHence, the density of the metal is 2.204 g/mL.

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Answer:

Hey there :))

Speed and Velocity are related in a lot of ways distance and displacement are. Speed is a scalar and velocity is a vector. They both represent a way to measure the change in position of an object relative to time.

Answer:

stroma part of chloroplast

Explanation:

In the lab, you examined factors that the influence of the absorption of the energy from the sun. You will investigated how the type of the material and the angle of the insolation affect the absorption of the heat.

The type of the material that will affects the absorption of the sunlight in the Earth's surface this is because of the different materials that will absorb the heat from the sunlight at the different rates. This results will support the  hypothesis this is because of the results that will show that air which is absorbs heat faster as compared to the any of the materials.

The amount of the absorption and the scattering which will depends on the nature of the molecules and the concentration of the air molecules and the small particles that is present in the atmosphere.

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The gas that has a solubility of 26 g per 100 g of water at 56°C is ammonia (NH3).

Ammonia is a colorless gas with a pungent odor and is commonly used in fertilizer production, refrigeration, and as a cleaning agent. It dissolves in water to form ammonium hydroxide, and its solubility increases with increasing temperature. At 56°C, the solubility of ammonia in water is 26 g per 100 g of water.

Ammonia (NH3) is a versatile compound that has many uses in industry, agriculture, and households. Some of its common uses include:

Fertilizer production: Ammonia is used to produce nitrogen-based fertilizers,

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During a chemical reaction, the concentrations of the reactants and products reach a constant level when the reaction reaches equilibrium.

At equilibrium, the rate of the forward reaction is equal to the rate of the reverse reaction, meaning that the concentrations of both the reactants and products remain constant. The equilibrium concentration of each product and reactant is determined by the reaction's equilibrium constant, which is unique for each reaction.
Hi! During a chemical reaction, the point at which the concentrations of the reactants and products reach a constant level is defined as "equilibrium." At equilibrium, the rate of the forward reaction (formation of products) is equal to the rate of the reverse reaction (formation of reactants), resulting in constant concentrations of both reactants and products.

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b. fossils we know about them because of the discovery .

The Earth was the home of the dinosaurs for at least 230 million years, according to a wealth of fossilized bones, teeth, trackways, and other physical evidence. But no dinosaur bones have been discovered in strata younger than 66 million years old, not even a single trace.

In June 2022, Dippy returned to the Natural History Museum as a component of a traveling exhibition. The replica will then be loaned to another institution for a period of three years. Applications for the future location were made available by the Museum in March 2022.

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Answer:

The electronic configuration of ions formed are:

Li+ (2) => 1s2

Cl- (18) => 1s2 2s2 2p6 3s2 3p6

Explanation:

Lithium metal, Li will lose 1 electron to lithium ion Li+. Chlorine atom, Cl will receive the 1 electron to form the chloride ion Cl- as shown by the following equation below:

Li —> Li+ + e

Cl+ e —> Cl-

Combine both equation

Li + Cl + e —> Li+ + Cl- + e

Cancel out 'e'

Li + Cl —> Li+ Cl-

Thus, we can write the electronic configuration for the reaction as follow:

Before reaction:

Li (3) => 1s2 2s1

Cl (17) => 1s2 2s2 2p6 3s2 3p5

After reaction

Li+ (2) => 1s2

Cl- (18) => 1s2 2s2 2p6 3s2 3p6

Therefore, the electronic configuration of the ions formed are:

Li+ (2) => 1s2

Cl- (18) => 1s2 2s2 2p6 3s2 3p6

According to given statement volume of HCl solution is 0.200 M x 11.0 mL/concentration of HCl is needed

To calculate the volume of a 0.100 M HCl(aq) solution needed to precipitate the silver ions from 11.0 mL of a 0.200 M AgNO3 solution, we can use the balanced chemical equation:

AgNO3(aq) + HCl(aq) → AgCl(s) + HNO3(aq)

From the equation, we can see that the ratio of AgNO3 to HCl is 1:1. Therefore, the moles of AgNO3 in the 11.0 mL solution can be calculated as:

moles of AgNO3 = concentration of AgNO3 x volume of AgNO3 solution
moles of AgNO3 = 0.200 M x 11.0 mL

Next, we can determine the volume of HCl solution needed by using the mole ratio:

moles of HCl = moles of AgNO3

Finally, we can convert the moles of HCl to volume using its concentration:

volume of HCl solution = moles of HCl / concentration of HCl

Using the given values, you can substitute them into the formulas to find the answer.

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The molarity of the diprotic acid that requires 18.73 mL KOH is 1.405 M.

The chemical reaction between a diprotic acid and KOH is

H₂A + 2 KOH → K₂A + 2 H₂O

In stoichiometry, we learn the chemical reaction and the laws that work in it. According to Avogadro's law, the coefficient of a substance in a chemical reaction expresses the ratio of the number of moles of each substance.

\(M \:=\: \frac{n}{V}\)

n = MV

KOH

The number of moles for a diprotic acid

n KOH : n H₂A = 2 : 1
n H₂A = n KOH ÷ 2
n H₂A = 5.619 ÷ 2
n H₂A = 2.8095 mmol

The molarity of a diprotic acid

\(M \:=\: \frac{n}{V}\)
\(M \:=\: \frac{2.8095}{25.00}\)
M = 1.405 M

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Answer:

100.0869 g/mol

The molar mass of CaCO3 is 100.0869 g/mol. We need to add the molar masses of calcium (40.078 g/mol), carbon (12.0107 g/mol) and three oxygen atoms

Explanation:

If a 74.28-g sample of Ba(OH)\(_2\) is dissolved in enough water to make 2.450 liters of solution, 565 mL this solution must be diluted with water in order to make 1.000 L of 0.100 M Ba(OH)\(_2\). The correct answer ius option A.

To solve this problem, we need to determine the concentration of the original solution and then calculate the volume of the solution that needs to be diluted to obtain the desired concentration.

First, let's calculate the concentration of the original solution:

Calculate the number of moles of Ba(OH)\(_2\):

Number of moles = mass / molar mass

Molar mass of Ba(OH)\(_2\) = (1 × atomic mass of Ba) + (2 × atomic mass of O) + (2 × atomic mass of H)

Molar mass of Ba(OH)\(_2\) = (1 × 137.33) + (2 × 16.00) + (2 × 1.01) = 171.34 g/mol

Number of moles = 74.28 g / 171.34 g/mol = 0.433 moles

Calculate the concentration in mol/L (M) of the original solution:

Concentration (M) = moles / volume (L)

Concentration (M) = 0.433 moles / 2.450 L = 0.177 M

The concentration of the original solution is 0.177 M.

Now, let's calculate the volume of the original solution that needs to be diluted to obtain 1.000 L of 0.100 M Ba(OH)\(_2\):

Use the dilution equation:

C\(_1\)V\(_1\) = C\(_2\)V\(_2\)

C\(_1\)= initial concentration = 0.177 M

V\(_1\) = initial volume (unknown)

C\(_2\) = final concentration = 0.100 M

V\(_2\) = final volume = 1.000 L

Rearrange the equation to solve for V\(_1\):

V\(_1\) = (C\(_2\)V\(_2\)) / C\(_1\)

V\(_1\) = (0.100 M × 1.000 L) / 0.177 M

V\(_1\) = 0.565 L

Finally, we convert the volume from liters to milliliters:

V\(_1\)= 0.565 L × 1000 mL/L = 565 mL

Therefore, the volume of the original solution that needs to be diluted with water to obtain 1.000 L of 0.100 M BBa(OH)\(_2\) is 565 mL.

The correct answer is A) 565 mL.

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Answer: a)Complete ionic equation:

2NH₄⁺ + S²⁻ + Fe²⁺ + SO₄²⁻ → 2NH₄⁺ + SO₄²⁻ + FeS

Net ionic equation:

Fe²⁺ + S²⁻ → FeS

b) Complete ionic equation:

2Na⁺ + SO₃²⁻ + Ca²⁺ + 2Cl⁻ → 2Na⁺ + 2Cl⁻ + CaSO₃

Net ionic equation:

SO₃²⁻ + Ca²⁺ → CaSO₃

c) Complete ionic equation:

Cu²⁺ + SO₄²⁻ + Ba²⁺ + 2Cl⁻ → Cu²⁺ + 2Cl⁻ + BaSO₄

Net ionic equation:

Ba²⁺ + SO₄²⁻ → BaSO₄

Explanation:

(a) Balanced formula equation:

(NH₄)₂S + FeSO₄ → (NH₄)₂SO₄ + FeS

Complete ionic equation:

2NH₄⁺ + S²⁻ + Fe²⁺ + SO₄²⁻ → 2NH₄⁺ + SO₄²⁻ + FeS

Net ionic equation:

Fe²⁺ + S²⁻ → FeS

(b) Balanced formula equation:

Na₂SO₃ + CaCl₂ → NaCl + CaSO₃

Complete ionic equation:

2Na⁺ + SO₃²⁻ + Ca²⁺ + 2Cl⁻ → 2Na⁺ + 2Cl⁻ + CaSO₃

Net ionic equation:

SO₃²⁻ + Ca²⁺ → CaSO₃

(c) Balanced formula equation:

CuSO₄ + BaCl₂ → CuCl₂ + BaSO₄

Complete ionic equation:

Cu²⁺ + SO₄²⁻ + Ba²⁺ + 2Cl⁻ → Cu²⁺ + 2Cl⁻ + BaSO₄

Net ionic equation:

Ba²⁺ + SO₄²⁻ → BaSO₄

Answer:

An object with more mass (heavier object), requires more force to set it in motion if something neglects friction. Newton's 2nd law, F=ma, tells us that the force required to produce a given acceleration is proportional to the mass of the object.

Explanation:

Hope this helps :)

the answer to your question is C

Taking a mixed melting point is a procedure used to identify the identity of an unknown compound.

Melting point is the temperature at which a solid substance changes from its solid state to a liquid state at a constant pressure. It is a characteristic property of a substance and is often used to identify and characterize compounds.

This process involves combining the unknown compound sample with another sample of a known compound of similar structure and melting point. Both samples are then heated up, and the resulting mixture of compounds is observed as it undergoes a single melting or boiling process. If the melting point of the unknown compound is close to that of the known sample, then it can be assumed that the unknown compound is of the same structure as its partner. Alternatively, if the melting point of the mixture is lower than that of the known sample, then it indicates that the unknown sample has a different structure than the known one. By measuring the peak of the melting point curve and comparing it to the literatures documented melting points, an unknown compound can be identified.

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The activation energy is 57.53 kJ/mol and the frequency factor is 7.18E+10 s^-1

It should be noted that to create a linear plot from the temperature-dependent rate constant data, we need to take the natural logarithm of both sides of the Arrhenius equation. This gives us:

ln(k(T)) = ln(A) - (Ea/RT)

We can rewrite this equation in the form of y = mx + b, where y = ln(k(T)), x = 1/T, m = -Ea/R, and b = ln(A):

y = mx + b

ln(k(T)) = (-Ea/R)(1/T) + ln(A)

Now, we can plot ln(k(T)) versus 1/T using MS Excel and perform linear regression to find the slope and intercept of the line. Here is a table of the given data and the calculated values of ln(k(T)) and 1/T:

T (K) k(T) (s^-1) ln(k(T)) 1/T

200.0 4.35E+06 15.294 0.005

250.0 1.94E+07 16.779 0.004

300.0 5.10E+07 17.738 0.00333

350.0 9.66E+07 18.395 0.00286

400.0 1.72E+08 18.967 0.0025

Using Excel's LINEST function, we can find the slope and intercept of the linear plot:

Slope = -Ea/R = -6.9174E+03 K

Intercept = ln(A) = 25.044

Therefore, the activation energy and frequency factor are:

Ea = -slope x R = 57.53 kJ/mol

A = exp(intercept) = 7.18E+10 s^-1

So the activation energy is 57.53 kJ/mol and the frequency factor is 7.18E+10 s^-1.

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Answer:

There is nothing attached to this question so I unfortunately cannot help you

Explanation:

Answer:

45

Explanation:

135 divided by 3 is 45

I hope it's right! Don't get discouraged if you can't find an answer!

The direct capture of a free electron by a neutral atom is the easiest technique to create negative ions.

How is an ion made to be negatively charged?

Positive ions made by a positive ion source can be double-charged-exchanged to create negative ions,

or negative ions can be directly extracted from a negative ion source.

creation of negative ions.

Negative ions and other energy levels below the vacuum level can be inhabited by adding an electron to an atom or molecule.

The atom has a net negative charge of e despite not being stable.

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Answer:

2 or 3 hrs

I think

Answer:

it D because it make more sense

The question is incomplete, the complete question is;

1. Mary and her siblings share similar hair color. Which of these cell components are most involved in determining the hair color of each sibling?

Gene, Chromosome, Nucleus

Cytoplasm, Chloroplasts,Genes

Vacuoles, Nucleus, Chromosomes

Chromosomes, Chloroplasts, Vacuoles

Answer:

Gene, Chromosome, Nucleus

Explanation:

Gene is defined in biology as "a unit of heredity which is transferred from a parent to offspring and is held to determine some characteristic of the offspring" (Oxford Dictionary).

The gene is located in the chromosomes in the nucleus of cells. The sum total of the genes that an organism inherits from its parents is called the organisms' genotype and determines certain features of the organism.

The hair colour of Mary and each of her siblings depends on the genes they received from their parents.

To calculate a chemical equation, balance the number of atoms of each element on both sides of the equation. Once the equation is balanced, calculate the number of moles of each reactant or product required for a specific chemical reaction.

A chemical equation is a written representation of a chemical reaction. It shows the reactants on the left side of an arrow and the product on the right side of the arrow.

First, balance the number of atoms of each element on both sides of the equation. If the equation is not balanced, add coefficients to the reactants or products to balance the number of atoms of each element.

A balanced equation can be used to calculate the number of moles of each reactant or product required for a specific chemical reaction. Use the molar mass of each reactant or product and the balanced equation.

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