which of the following is larger then the atomic radius of phosphorus
Options
a: the ionic radius of phosphorus
b: the atomic radius of argon
c: the atomic radius of nitrogen
d: the ionic radius of chlorine

The mass of carbon dioxide that would be made by reacting 30 grams C2H6 with 320 grams O2 will be 80 grams

From the balanced equation of the reaction:

\(2C_2H_6+7O_2---4CO_2+6H_2O\)

The mole ratio of C2H6 to O2 is 2:7.

                                        = 30/30

                                       = 1 mole

                                       = 10 moles

Thus, C2H6 is the limiting reactant.

Mole ratio of C2H6 to CO2 according to the equation = 1:2

Since the mole of C2H6 is 1, the equivalent mole of CO2 would, therefore, be 2.

Mass of 2 moles CO2 = mole x molar mass

                                    = 2 x 44

                                      = 88 grams

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Answer:

1. 0.74mol

2. 0.42mol

3. 2.125mol

4. 0.301mol

5. 4.52 × 10^23 particles

Explanation:

Number of moles (n) in a substance can be found using the formula:

mole (n) = mass/molar mass

Using this formula, the following moles are calculated:

1. Molar of Na = 23g/mol

mole = 17/23

mole = 0.74mol

2. Molar mass of Na2SO4 = 23(2) + 32 + 16(4)

= 46 + 32 + 64

= 142g/mol

Mole = 60/142

mole = 0.42mol

3. Molar mass of CO2 = 12 + 16(2)

= 12 + 32

= 44g/mol

mole = 93.5/44

mole = 2.125mol

4. Molar mass of sodium nitrate (NaNO3) = 23 + 14 + 16(3)

= 23 + 14 + 48

= 85g/mol

mole = 25.6/85

mole = 0.301mol

5. Number of particles in one mole of a substance is 6.022 × 10^23 particles. Hence, in 0.75mol of calcium hydroxide (Ca(OH)2, there will be;

0.75mol × 6.02 × 10^23

= 4.515 × 10^23

= 4.52 × 10^23 particles

Answer:

Liquid to gas.

Explanation:

Answer:

b

Explanation:

Water in to a gas or evaporation

In this system, the reactants A and B will react to form the product AB until the system reaches equilibrium.

This means that the rate of the forward reaction will equal the rate of the reverse reaction. Additionally, the equilibrium constant, Kc, can be used to calculate the amount of the products and reactants at equilibrium.

The equilibrium constant, Kc, is used to calculate the relative amounts of products and reactants at equilibrium. It is calculated by taking the product of the concentrations of the products raised to their respective stoichiometric coefficients and dividing it by the product of the concentrations of the reactants raised to their respective stoichiometric coefficients. This equation looks like this:

Kc = (Products)^(Stoichiometric Coefficients) / (Reactants)^(Stoichiometric Coefficients)

For example, if we have the reaction A + B → AB, Kc can be calculated as follows:

This equation states that the equilibrium constant, Kc, is equal to the concentration of AB divided by the product of the concentrations of A and B.

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The volume of the gas at STP would be 23.93 liters.

The volume of gas at STP (Standard Temperature and Pressure), we need to use the Ideal Gas Law, which states that PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the gas constant, and T is temperature. First, we need to calculate the number of moles of gas in the initial sample. We can use the formula n = PV/RT, where P is the initial pressure, V is the initial volume, R is the gas constant, and T is the initial temperature.
n = (2.31 atm) x (25.15 L) / [(0.0821 L atm/mol K) x (201 + 273.15 K)]
n = 1.067 moles

Now, we can use the molar volume of gas at STP, which is 22.4 L/mol, to calculate the volume of gas at STP.
V = n x 22.4 L/mol
V = 1.067 moles x 22.4 L/mol
V = 23.93 L
Therefore, the volume of the gas at STP would be 23.93 liters.

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The metal X has an approximate molar mass of 42.36 g/mol and the metal is most likely calcium.

The molar mass of the metal carbonate XCO₃ and identify the metal X, we need to calculate the number of moles of XCO₃ and CO₂ using the given masses and molar masses.

The molar mass of CO₂ (carbon dioxide) is 12.011 g/mol (for carbon) + 2 * 15.999 g/mol (for oxygen) = 44.01 g/mol.

The number of moles of CO₂ can be calculated using the formula:

moles of CO₂ = mass of CO₂ / molar mass of CO₂

moles of CO₂ = 0.855 g / 44.01 g/mol

moles of CO₂ ≈ 0.01944 mol

Since the reaction stoichiometry is 1:1 between XCO₃ and CO₂, the number of moles of XCO₃ is also approximately 0.01944 mol.

molar mass of XCO₃ = mass of XCO₃ / moles of XCO₃

molar mass of XCO₃ = 2.012 g / 0.01944 mol

molar mass of XCO₃ ≈ 103.38 g/mol

The molar mass of XCO₃ is approximately 103.38 g/mol.

To determine the metal X:

molar mass of X = molar mass of XCO3 - molar mass of CO3

molar mass of X = 103.38 g/mol - (12.011 g/mol + 3 * 15.999 g/mol)

molar mass of X ≈ 42.36 g/mol

Metal X is most likely Calcium that has a molar mass of 40 g/mol

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Answer:

Crystallization or crystallisation is the process by which a solid forms, where the atoms or molecules are highly organized into a structure known as a crystal. Some of the ways by which crystals form are precipitating from a solution, freezing, or more rarely deposition directly from a gas.

There are vacant orbitals on the phosphorus atom that allows it to expand its octet.

There is a concept that we would need to consider as we are answering the question that we here and that is the idea of the octet rule. The octet rule states that it is only about eight electrons that can be found on the outermost shell of an atom and as such all of the compounds can be formed in obedience to this rule.

Now we should know that there are no vacant d orbitals that are present on the nitrogen atom and this stems from the fact that it does not have a 3d level as such there are no orbitals that can be able to help the Nitrogen atom so as to be able to expand its octet. This is the reason why its pentafluoride can be easily formed.

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If calibration is to 2 ml, it means that cylinder is marked with calibration lines at every 2 ml interval. So, we can estimate the volume of liquid in the cylinder to the nearest 2 ml.

In chemistry, calibration is defined as the act of making sure that any scientific process/ instrument produce results which are accurate.

If calibration is to 2 ml, it means that cylinder is marked with calibration lines at every 2 ml interval. So, we can estimate the volume of liquid in the cylinder to the nearest 2 ml.

For example, if the bottom of the meniscus of liquid in the cylinder is at 6 ml mark and the top of the meniscus is between the 14 ml and 16 ml marks, we can estimate that the volume of liquid in cylinder is between 6 ml and 16 ml, but we cannot estimate a value in between such as 8 ml or 10 ml.

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Answer:

Element

Explanation:

Iron is an element

Answer: Your gut bacteria can affect how your food is digested, how fat is stored and whether you feel hungry or full.

Explanation: Thus, a healthy gut bacteria may be important for maintaining a healthy weight. High-fiber foods like whole grains, fruits, vegetables, nuts and seeds can all promote healthy gut bacteria.

Answer:

Explanation:

H+ = 1 X 10^-7.41 = 3.89 X 10^ -8

POH = 14-7.41 = 6.59

OH- = 1 x 10 ^-6.59 = 2.57 X 10^ -7

The [H+] and [OH−] concentrations of the solution are approximately 2.38 × 10^(-7) M, and the pOH is 6.59.

The pH of a solution is a measure of the concentration of hydrogen ions ([H+]) in the solution. The pH scale ranges from 0 to 14, with a pH of 7 considered neutral. A pH of 7.41 indicates that the solution is slightly basic. To calculate the [H+], [OH−], and pOH of the solution, we can use the relationship:

pH + pOH = 14

Given that the pH is 7.41, we can subtract it from 14 to find the pOH:

pOH = 14 - 7.41 = 6.59

Since pH + pOH = 14, we can also determine the [OH−] by taking the antilogarithm of the pOH value:

[OH−] = 10^(-pOH)

[OH−] = 10^(-6.59)

[OH−] ≈ 2.38 × 10^(-7) M

Since the solution is neutral, the concentration of [H+] will be equal to the concentration of [OH−]:

[H+] = [OH−] ≈ 2.38 × 10^(-7) M

Therefore, the [H+] and [OH−] concentrations of the solution are approximately 2.38 × 10^(-7) M, and the pOH is 6.59.

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NAFTA provides enormous benefits to the United States, Canada, and Mexico by facilitating cross-border trade, job creation, and economic growth. However, it has also created political pressure for government subsidies to the United States, where businesses and industries are struggling to compete with low-cost Mexican producers.

The North American Free Trade Agreement (NAFTA) provides for free trade between the United States, Canada, and Mexico, which is a landmark trade agreement in North America. NAFTA has expanded cross-border trade by lowering tariffs and trade barriers among the three countries, making it easier for goods and services to move across the borders.NAFTA provides enormous benefits, including increased trade, job creation, lower costs for goods, and services.

It has led to an increase in foreign investment, cross-border trade, and job creation. NAFTA's liberalization has contributed to increased cross-border integration, including trade in goods and services, and financial integration among the three countries, which has resulted in a more prosperous North American economy.However, NAFTA has created political pressure for government subsidies to the United States, where businesses and industries are struggling to compete with low-cost Mexican producers.

As a result, many industries and labor groups in the United States have called for the imposition of import barriers and other forms of protectionism to protect their interests. They have also criticized the agreement for its impact on domestic industries and jobs.The government subsidies have led to the loss of jobs in many domestic industries, such as the automotive and steel industries. The NAFTA's provisions have created competition between the two countries, which has driven down prices and led to a reduction in the number of jobs in certain sectors of the economy.

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Answer:

A chemical change

Explanation:

The marshmallow turning brown and bubbling implies that a chemical change has taken place.

For chemical changes to occur, we observe any of the following:

ii. Two signs that shows a chemical change has taken place is that:

Oxygen-16: 8 protons, 8 neutrons, 8 electrons

Oxygen-18: 8 protons, 10 neutrons, 8 electrons

Using atomic and mass numbers, we can find information about the makeup of atoms.

Protons

Every element has a unique number of protons, and every atom of the same element will have the same number of protons. This means that both oxygen atoms must have the same number of protons. The number of protons in an element is equal to its atomic number. Since oxygen has an atomic number of 8, all oxygen atoms will have 8 protons. This means that oxygen-16 and oxygen-18 have 8 protons.

Neutrons

The number of neutrons an atom of a certain element can have varies. Atoms of the same element that have different numbers of neutrons are known as isotopes. The number of neutrons can be found through the mass number. The mass number is the number that follows the dash in the name of the isotope. This number is equal to the protons plus the neutrons. So, to find the number of neutrons in an oxygen atom, subtract 8 protons from the mass number. This means oxygen-16 has 8 neutrons and oxygen-18 has 10 neutrons.

Electrons

Remember that electrons are negatively charged, protons are positively charged, and neutrons have no charge. The number of electrons in an atom determines the charge of the atom. If the number of electrons equals the number of protons, then the charge of the atom will equal 0. If there are more electrons, then the atom will be negatively charged and vice versa. Since neither of the atoms has any indication of a nonzero charge, the number of electrons must equal the number of protons. So, both oxygen atoms have 8 electrons.

The mole fraction of N₂ after the mixture of 4.0 L of N₂ at 15 atm with 4.0 L of H₂ at 7.0 atm is 0.68.

We can calculate the mole fraction of N₂ with the following equation:

\( X_{N_{2}} = \frac{n_{N_{2}}}{n_{t}} = \frac{n_{N_{2}}}{n_{N_{2}} + n_{H_{2}}} \)   (1)

The number of moles of N₂ and H₂ can be found with the ideal gas law:

\( PV = nRT \)

Where:

P: is the pressure

R: is the gas constant

T: is the temperature

V: is the volume

For nitrogen gas we have:

\( n_{N_{2}} = \frac{P_{N_{2}}V_{N_{2}}}{RT} \)   (2)

And for hydrogen:

\( n_{H_{2}} = \frac{P_{H_{2}}V_{H_{2}}}{RT} \)   (3)

After entering equations (2) and (3) into (1), we get:

\( X_{N_{2}} = \frac{\frac{P_{N_{2}}V_{N_{2}}}{RT}}{\frac{P_{N_{2}}V_{N_{2}}}{RT} + \frac{P_{H_{2}}V_{H_{2}}}{RT}} \)  

Since RT are constants, we have:

\( X_{N_{2}} = \frac{P_{N_{2}}V_{N_{2}}}{P_{N_{2}}V_{N_{2}} + P_{H_{2}}V_{H_{2}}} \)                

We know that:

\( P_{N_{2}} = 15 atm\)                

\( V_{N_{2}} = 4.0 L\)                

\( P_{H_{2}} = 7.0 atm\)                

\( V_{H_{2}} = 4.0 L\)          

so:

\( X_{N_{2}} = \frac{15 atm*4.0 L}{15 atm*4.0 L + 7.0 amt*4.0 L} = 0.68 \)                

Therefore, the mole fraction of N₂ is 0.68.

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This is a perfect answer

ω

Answer:

It is no. D

Explanation:

Many meteoroids are formed from the collision of asteroids, which orbit the sun between the paths of Mars and Jupiter in a region called the asteroid belt.

Answer:

4 sig figs: 20.18

Explanation:

the smallest amount of digits was 4 in the expression

Answer: 20.2

Explanation:

you round that to the nearest and it's 20.2

Answer:

Tinatapon yong food

Explanation:

It's dangerous to eat

If a retail food establishment unknowingly contaminates food with dangerous bacteria, it can lead to foodborne illness outbreaks and pose a risk to public health.

If a retail food establishment, such as a restaurant or grocery store, unknowingly contaminates food with dangerous bacteria, several potential consequences can occur. Firstly, contaminated food can be distributed to customers, increasing the risk of foodborne illnesses. Consuming food contaminated with pathogens like Salmonella, E. coli, or Listeria can result in gastrointestinal symptoms, such as diarrhea, vomiting, and abdominal pain, and in severe cases, it can lead to hospitalization or even death, especially in vulnerable populations.

Secondly, if customers become sick due to consuming contaminated food, it can lead to negative publicity and damage the reputation of the establishment. This can result in a loss of customers, financial implications, and potential legal consequences if negligence is proven.

Additionally, if a foodborne illness outbreak occurs, it may trigger an investigation by local health authorities. The establishment may face inspections, potential closure, and the need for corrective actions to address the contamination issue. Public health agencies may also conduct trace-back investigations to identify the source of the contamination and prevent further spread.

Overall, the unknowing contamination of food with dangerous bacteria in a retail food establishment can have serious consequences, including the risk of foodborne illnesses, negative impact on the establishment's reputation, legal implications, and potential regulatory actions. It highlights the importance of proper food handling, hygiene practices, and regular monitoring to ensure the safety of the food served to the public.

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The amount of energy released as heat when a 12.8 g sample of diethyl ether is burned is 469.23 kJ.

The given combustion reaction is:

CH₃CH₂OCH₂CH₃(l) + 6O₂(g) → 4CO₂(g) + 5H₂(g) ∆H = -2.72 × 10³ kJ

We are given a 12.8 g sample of diethyl ether (C₄H₁₀O), which has a molar mass of 74.12 g/mol. To find the amount of moles of diethyl ether, we can use the formula:

moles = mass/molar mass

moles of diethyl ether = 12.8 g / 74.12 g/mol = 0.1727 mol

According to the balanced chemical equation, one mole of diethyl ether produces -2.72 × 10³ kJ of heat. Therefore, we can find the amount of heat produced for 0.1727 moles of diethyl ether by using the following formula:

Heat produced = moles of diethyl ether × ∆H

Heat produced = 0.1727 mol × (-2.72 × 10³ kJ/mol) = -469.23 kJ

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When some of the sugar added to iced tea remains undissolved at the bottom of the glass, the solution is Saturated.

Solution is saturated which means no more solute can be dissolved in the solvent at the given/present temperature and pressure conditions. To dissolve more sugar in the tea we need to increase the temperature of the tea so that the tea becomes unsaturated, for the given conditions also the solubility of the solids increases with the increase in the temperature, so more of the sugar can be dissolved if the temperature of the solvent is increased.

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The quotient of the given mathematical problem is equal to 2. Therefore, option A is correct.

In arithmetic, a quotient can be described as a quantity produced by the division of two numbers. The quotient has used throughout mathematics and is referred to as the integer part of a division or as a fraction or a ratio.

A rational number is the quotient of two integers when the denominator is non-zero.

A real number r is rational, it can be expressed as a quotient of two integers with a non-zero denominator.

Given a real number r, r is rational if and only if there exist integers a and b such that\({\displaystyle r={\tfrac {a}{b}}}, {\displaystyle b\neq 0}\)

Given, the division of √100/√25

We can write the \(\sqrt{100} =\sqrt{25\times 4} =\sqrt{25} \sqrt{4}\)

Now, \(\displaystyle \frac{\sqrt{100}}{\sqrt{25}}= \frac {\sqrt{25}\times \sqrt{4} }{ \sqrt{25}} =\sqrt{4} =2\)

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The IUPAC name for the given molecule, which has four carbon atoms, one OH group, and two methyl (CH3) groups attached, is:

4-methyl-2-pentanol

What is IUPAC?

It is an international organization that aims to advance the chemical sciences and to contribute to the application of chemistry in the service of humankind.

Identify the longest carbon chain that contains the functional group (OH). In this case, the longest chain has five carbon atoms.

Number the carbon atoms in the chain, starting from the end that is closest to the functional group (OH). In this case, we can number the chain from left to right, so that the OH group is on carbon atom 2.

Identify and name the substituents (groups) attached to the main chain. In this case, there are two methyl (CH3) groups attached to carbon atoms 4 and 5, respectively.

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Explanation:

Fusion processes require fuel and a confined environment with sufficient temperature, pressure, and confinement time to create a plasma in which fusion can occur. The combination of these figures that results in a power-producing system is known as the Lawson criterion. In stars, the most common fuel is hydrogen, and gravity provides extremely long confinement times that reach the conditions needed for fusion energy production. Proposed fusion reactors generally use hydrogen isotopes such as deuterium and tritium (and especially a mixture of the two), which react more easily than hydrogen to allow them to reach the Lawson criterion requirements with less extreme conditions. Most designs aim to heat their fuel to around 100 million degrees, which presents a major challenge in producing a successful design.

As a source of power, nuclear fusion is expected to have many advantages over fission. These include reduced radioactivity in operation and little high-level nuclear waste, ample fuel supplies, and increased safety. However, the necessary combination of temperature, pressure, and duration has proven to be difficult to produce in a practical and economical manner. Research into fusion reactors began in the 1940s, but to date, no design has produced more fusion power output than the electrical power input.[1] A second issue that affects common reactions is managing neutrons that are released during the reaction, which over time degrade many common materials used within the reaction chamber.

Fusion researchers have investigated various confinement concepts. The early emphasis was on three main systems: z-pinch, stellarator, and magnetic mirror. The current leading designs are the tokamak and inertial confinement (ICF) by laser. Both designs are under research at very large scales, most notably the ITER tokamak in

Answer:

it increases and is perpendicular to the motion of the wave.

The correct options showing how to convert between the given units are:

The atomic mass of an element is equal to the total number of protons and neutrons in its nucleus. This can be determined by looking at the element's atomic number and mass number, which can be found on the periodic table.

The atomic number is equal to the number of protons, and the mass number is equal to the total number of protons plus neutrons. These values can then be used to calculate the atomic mass of an element.

Corrects answer: letter A and C.

which of the following options correctly show how to convert between the units given? select all that apply:

A)The atomic mass unit is defined as \(\frac{1}{2} th\) of the mass of a carbon-12 atom.

B) The atomic mass of an element can be read from the periodic table.

C) The atomic mass of an element is the sum of its protons and neutrons

D) The unit of atomic mass is the gram.

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Answer:

I think it's

(A) A telescope is an instrument that magnifies tiny objects to make them appear bigger