A chemical reaction produced 125mL of CO2. What was the mass of the gas produced? ​

Answer:

1.12 × 10²³ molecules O₂

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

4.18 L O₂

Step 2: Identify Conversions

Avogadro's Number

STP - 22.4 L / mol

Step 3: Convert

\(4.18 \ L \ O_2(\frac{1 \ mol \ O_2}{22.4 \ L \ O_2})(\frac{6.022 \cdot 10^{23} \ molecules \ O_2}{1 \ mol \ O_2} )\) = 1.12375 × 10²³ molecules O₂

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

1.12375 × 10²³ molecules O₂ ≈ 1.12 × 10²³ molecules O₂

Answer:

covalent

Explanation:

A potassium atom's ground state electron configuration is 1s2, 2s2, 2p6, 3s2, 3p6, 4s1.

An atom's electron configuration is a picture of how electrons are arranged in relation to orbital shells and subshells. Consequently, this is potassium's electron configuration.

Making Electron Configurations in Writing. Write the energy level (the period) first, then the subshell that needs to be filled, and finally the superscript, which indicates how many electrons are in that subshell. The atomic number, Z, is the sum of all the electrons.

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Potassium can be a component of the cream.

An element's presence can be determined using a flame test. The potassium in cream of tartar is what gives it its white-purple color.

Low ionization enthalpy elements allow the flame to display color. Due to low ionization enthalpy, when an element is heated, its valence electrons are quickly excited to higher orbits and emit light as they return to their original orbit. Salts of potassium emit a white-purple color when ignited. The cream of tartar's chemical formula is KC₄H₅O₆.

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Precipitates are insoluble ionic solid products of a reaction, formed when certain cations and anions combine in an aqueous solution. The determining factors of the formation of a precipitate can vary.

Answer:

electrons

Explanation:

electricity is the flow of electrons through a conductor

Answer:

protons

Explanation:

and neutrons never move from object to object. The energy that comes from these charged particles is called electrical energy.

The new volume of the gas is 832.5 ml assuming the moles of gas and temperature are held constant

Since the temperature and number of moles of gas are held constant, the pressure-volume relationship of the gas follows Boyle's Law, which states that the pressure and volume of a gas are inversely proportional at constant temperature.

the gas in a 275.0 ml piston experiences a change in pressure from 1.00 atm to 3.10 atm.

P1V1 = P2V2, where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.

V2 = V1 * P1 / P2

= 275.0 ml * 1.00 atm / 3.10 atm

= 832.5 ml

hence, The new volume of the gas is 832.5 ml.

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Answer:I’m not for sure

Explanation:

Answer:

I don't really get your question but I think my answer relates to your question :)

Explanation:

Due to the high availability of sunlight, sea grass can get the sufficient light energy to carry photosynthesis and storage of energy.

Photosynthesis is a biochemical process by which green plants synthesis energy and in the leaves by the aid of light energy. Here, the light energy is converted to chemical energy.

Plants need sunlight for the light reaction of photosynthesis. In the absence of sunlight, they cant synthesis energy and the chlorophyll does not get active. They will grow towards sunlight.

The sea grass are getting sufficient light energy for the synthesis of energy. The energy storage molecules ie. ATP in sea grass will be synthesized in higher rate with the presence of sun shining.

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According to the given statement Most radioactive element have more proton than neutron.

For instance, the Earth's crust naturally contains the radioactive elements uranium and thorium. These two elements progressively alter their forms over millions of years, leading to the production of decay byproducts like radon and radium. Energy is released during this process. Alpha radiation is one type of this energy.

By monitoring the activity of the relevant radioisotopes, it is possible to identify naturally occurring radioactive materials. When it comes to radioactive materials with brief half-lives, these measurements are very useful. Despite being the most ionizing, alpha particles have a relatively shallow penetration depth; they cannot reach the skin's higher layers.

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Answer:

To determine the amount of a 70% acid solution and a 20% solution needed to produce a 45% solution, we can set up a system of equations based on the principles of concentration and volume.

Let's assume that x mL of the 70% acid solution needs to be mixed with (200 - x) mL of the 20% solution.

The total amount of acid in the resulting mixture can be calculated as follows:

0.70x + 0.20(200 - x) = 0.45(200)

Now, let's solve this equation to find the value of x:

0.70x + 40 - 0.20x = 90

0.70x - 0.20x = 90 - 40

0.50x = 50

x = 50 / 0.50

x = 100

Therefore,

100 mL of the 70% acid solution needs to be mixed with (200 - 100) = 100 mL of the 20% solution to produce 200 mL of a 45% solution

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Among the given isotopes,  ³⁰X₁₅ and ³¹X₁₅ are isotopes of the same element and that element is phosphorous.

Isotopes are those atoms of an element that contains the same atomic number but a different mass number. Isotopes of an element contain an equal number of electrons and protons in their atom but the numbers of neutrons in their respective nucleus are different.

For example, the isotopes of oxygen element are given as oxygen- 16, oxygen - 17, and oxygen-18, these all isotopes have eight protons or electrons.

Given elements are ³⁰X₁₅, ³¹X₁₆, ³¹X₁₅, and ⁶⁰X₃₀. The atoms ³⁰X₁₅ and ³¹X₁₅  have the same atomic number but a different mass number, therefore they are isotopes of the same element. As their atomic number of them is 15 so they are isotopes of phosphorous and ³¹X₁₅ isotope of P has 100 % abundance.

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Answer:

have one delocalised electron

Explanation:

The elements which are  present of left side of periodic table have similar chemical properties.

Periodic table is a tabular arrangement of elements wherein elements are arranged according to their atomic numbers. It consists of seven horizontal rows called periods  and eighteen vertical columns called groups .

Elements in the same group have similar chemical properties as they have same number of valence electrons. While, electrons in the same period have different valence electrons as electrons are added to same shell and hence have  a little variation in chemical properties.

It is called periodic as properties repeat after an interval of certain electronic configuration. Elements are divided in four blocks depending on their properties.

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Answer:

A. The birthrate is higher than the death rate

Explanation:

The vibrational partition function (Q) for chlorine at 25°C, summing over the lowest 4 vibrational levels, is given by the simplified expression: Q = e^(-2.220).

The relative population between the first and second excited vibrational energy levels (N1/N2) of chlorine at 298 K (25°C) can be calculated using the relative Boltzmann factors, taking into account the energies of the levels and the Boltzmann constant.

The vibrational partition function (Q) represents the sum of the Boltzmann factors for all the vibrational energy levels. For a diatomic molecule like chlorine (Cl2), assuming equally spaced vibrational energy levels and a degeneracy (g) of 1 for each level, we can calculate the partition function.

To calculate Q, we sum over the lowest 4 vibrational levels, taking into account the energy spacing between levels.

The energy spacing between levels is given as 558 cm^(-1), which we convert to Joules using the conversion factor of 1 cm^(-1) = 1.986445 × 10^(-23) J.

Using the formula for the partition function:

Q = e^(-E1/(kT)) + e^(-E2/(kT)) + e^(-E3/(kT)) + e^(-E4/(kT))

Substituting the values:

Q = e^(-5581.98644510^(-23)/(1.3806510^(-23)(25+273)))

Simplifying the exponent and performing the calculations:

Q ≈ e^(-2.220)

Therefore, the vibrational partition function (Q) for chlorine at 25°C, summing over the lowest 4 vibrational levels, is approximately e^(-2.220).

The relative population between the first and second excited vibrational energy levels (N1/N2) of chlorine at 298 K (25°C) can be calculated using the relative Boltzmann factors, taking into account the energies of the levels and the Boltzmann constant.

The relative population (N1/N2) between two vibrational energy levels can be determined using the Boltzmann factors, which depend on the energies of the levels and the temperature.

The energy difference between the ground state and the first excited level is given as 558 cm^(-1), which we convert to Joules using the conversion factor of 1 cm^(-1) = 1.986445 × 10^(-23) J.

Using the Boltzmann factor formula:

N1/N2 = e^(-ΔE/(k*T))

Substituting the values:

N1/N2 = e^(-5581.98644510^(-23)/(1.38065*10^(-23)*298))

Simplifying the exponent and performing the calculations:

N1/N2 ≈ e^(-1.524)

Therefore, the relative population between the first and second excited vibrational energy levels (N1/N2) of chlorine at 298 K (25°C) is approximately e^(-1.524).

Note: The relative population is given as a ratio of the populations between the two levels.

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If the pH at one-half the first and second equivalence points of a dibasic acid is 4.20 and 7.34, respectively. The values for pKa1 and pKa2 will be 4.20 and 7.34. Ka1 and Ka2 will be ≈ 6.31 x 10^(-5), and ≈ 2.07 x 10^(-8) respectively.

To find the values of pKa1 and pKa2, we need to understand the relationship between pH and pKa in a titration curve. At one-half the equivalence point, the concentrations of the acid and its conjugate base are equal, resulting in a pH equal to the pKa of the corresponding dissociation.

Given:

pH at one-half the first equivalence point (pKa1) = 4.20

pH at one-half the second equivalence point (pKa2) = 7.34

From the information provided, we can determine the values for pKa1 and pKa2.

pKa1 = pH at one-half the first equivalence point

pKa1 = 4.20

pKa2 = pH at one-half the second equivalence point

pKa2 = 7.34

To calculate Ka1 and Ka2, we use the relationship:

Ka = 10^(-pKa)

Ka1 = 10^(-pKa1)

Ka1 = 10^(-4.20)

Ka2 = 10^(-pKa2)

Ka2 = 10^(-7.34)

Calculating the values:

Ka1 ≈ 6.31 x 10^(-5)

Ka2 ≈ 2.07 x 10^(-8)

To summarize:

pKa1 = 4.20, pKa2 = 7.34

Ka1 ≈ 6.31 x 10^(-5), Ka2 ≈ 2.07 x 10^(-8)

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Answer: Triple Point of Water

Explanation:

The triple point on a phase diagram is indicated by the point where all three equilibrium lines meet. This is the temperature and pressure combination that allows for all three phases of a substance to occur simultaneously.

Answer: All options (I, II, III, IV, V)

Explanation: The answer is all options because they never reach equilibrium or intersect at a region as the both decrease at the same rate.

Answer: Picture shows the correct one

Explanation:

Answer: yeah i just attached a labeled picture ‍♀️

Do you have the answers for this test ?!?Im taking it right now and grades are due this friday so I need to pass this test

Answer:

These are called cis-but-2-ene (where the groups are on the same side) or trans-but-2-ene (where they are on opposite sides). Cis-but-2-ene is also known as (Z)-but-2-ene; trans-but-2-ene is also known as (E)-but-2-ene. For an explanation of the two ways of naming these two compounds, follow the link in the box below.

Explanation:

Answer:

It is 1,400 j

Explanation:

That is what i know

Answer:

1,400J

Explanation:

the formula for calculating Gravitational Potential Energy is mass×gravitational field strength×height

70×10×20=1,400

Answer:

180.155 g

Explanation:

Partial pressure of CO2 in the mixture is 0.350 atm.

We need to use mole fraction of \(CO_{2}\) to find the partial pressure of CO2 in the mixture

First calculate the moles of carbon dioxide and CH4 in the mixture. Now can use the molar mass of each gas. Then convert the given masses to moles.

moles of \(CO_{2}\) = 4.34 / 44.01  = 0.0987 mol

moles of \(CH_{4}\) = 3.08  / 16.04 = 0.192 mol

Now have to calculate the total moles of gas.

Total moles = moles of \(CO_{2}\) + moles of CH4 = 0.0987 mol + 0.192 mol = 0.2907 mol

Now we will calculate the mole fraction of CO2,

mole fraction of  \(CO_{2}\) = moles of \(CO_{2}\) / total moles = 0.0987 mol / 0.2907 mol = 0.3396

Finally, mole fraction to calculate the partial pressure of CO2

partial pressure of CO2 = mole fraction of CO2 x total pressure = 0.3396 x 1.03 atm = 0.350 atm

Therefore the partial pressure is 0.350 atm.

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Answer:

2 NaF + Br2 --> 2NaBr + F2

Explanation:

Well first I notice that there are two flourines on the products side so we need to put a 2 of NaF. Now there are 2 sodiums on the products side so we have to put another two in front of NaBr.

2 NaF + Br2 --> 2NaBr + F2

Answer:

C D E

Explanation:

i took the test

Volatility is a measure of how easily a liquid evaporates and it decreases with increase in intermolecular forces.Volatile liquids have large number of molecules in the gas phase above liquid phase. Hence, options A, C, F are correct.

Intermolecular force is the force which binds the molecules or atoms in compound together. Three are various kinds of intermolecular forces such as ionic bond, covalent , H-bonding, dipole forces etc.

When liquids molecules have strong intermolecular interaction between them they will not be capable of escaping into the gaseous state. Hence volatility decreases with increase in intermolecular force.

For a volatile substance, the number of molecules which are escaped into gas phase above liquid phase  during evaporation will be higher. More volatile liquids will have lower boiling point . Hence, the correct statements regarding volatility are A, C and F.

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Answer:

Mass =116.16 g

Explanation:

Given data:

Moles of CF₄ = 1.32 mol

Mass of  CF₄ = ?

Solution:

Molar mass of  CF₄= 88 g/mol

Formula:

Number of moles = mass/ molar mass

Number of moles × molar mass = Mass

Mass = 1.32 mol ×  88 g/mol

Mass =116.16 g