Write the balanced chemical equation for the following reaction. Phases are optional. Solid iron(III) oxide reacts with hydrogen gas to form solid metallic iron and liquid water.

The Correct electron configuration of carbon as 1s² 2s² 2p². Option B.

To understand why this is the correct electron configuration, let's break it down step by step:

The atomic number of carbon is 6, which means it has six electrons. Electrons are distributed in energy levels or shells around the nucleus.

The first shell, known as the 1s orbital, can hold a maximum of 2 electrons. Therefore, the first part of the electron configuration is 1s², indicating that two electrons occupy the 1s orbital.

The second shell has two subshells: the 2s orbital and the 2p orbital. The 2s orbital can hold a maximum of 2 electrons, while the 2p orbital can hold a maximum of 6 electrons. In the case of carbon, after the 1s orbital, two more electrons occupy the 2s orbital. So far, we have 1s² 2s².

The remaining two electrons in carbon are placed in the 2p orbital. The 2p orbital consists of three separate p orbitals: 2px, 2py, and 2pz. Each p orbital can hold a maximum of 2 electrons. Therefore, the last part of the electron configuration for carbon is 2p², indicating that two electrons occupy the 2px and 2py orbitals. Option B is correct.

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Answer:

because it absorbs all colours expect for red,

Explanation: making the red light bounce into your eyes, therefore seeing the colour red

Question 2: The wave transfers its energy to the mineral, I think, thats my best guess

Answer:

D

Explanation:

The unit used to measure atomic mass is the atomic mass unit (amu). A single amu is equivalent to 1/12 the mass of an atom from the carbon-12 isotopIsotopes with different numbers of protons and neutrons will have an actual mass slightly different from the atomic mass calculated in atomic mass units.

The concentration of acid which is needed to completely neutralize 25.0 mL of 1.5 M NaOH, if it takes exactly 12.5 mL to reach the endpoint of the titration would be 3M.

We know that at the equivalence point in a neutralization, the moles of acid are equal to the moles of base.

\( \qquad\longrightarrow \sf Moles_{(Acid)} = Moles_{(Base)}\\\)

\(\footnotesize{ \longrightarrow \sf Volume_{(Acid)}\times Concentration_{(Acid)} = Volume_{(Base)}\times Concentration_{(Base)}} \\\)

According to the specific parameters-

Now that we have all the required values,so we can plug them into the formula and solve for concentration of acid -

\( \footnotesize{\longrightarrow \sf Volume_{(Acid)}\times Concentration_{(Acid)} = Volume_{(NaOH)}\times Concentration_{(NaOH)} }\\\)

\( \longrightarrow \sf 12.5 \: mL \times Concentration_{(Acid)} = 25 \:mL \times 1.5\: M \\\)

\( \longrightarrow \sf Concentration_{(Acid)} = \dfrac{25 \:mL \times 1.5\: M }{12.5\:mL}\\\)

\( \longrightarrow \sf Concentration_{(Acid)} = \dfrac{37.5\:\cancel{mL} \: M }{12.5\:\cancel{mL}}\\\)

\( \longrightarrow \sf Concentration_{(Acid)} = \dfrac{37.5\:M}{12.5}\\\)

\( \longrightarrow \sf Concentration_{(Acid)} = \dfrac{\cancel{37.5}\:M}{\cancel{12.5}}\\\)

\( \qquad\longrightarrow \sf \underline{Concentration_{(Acid)} = \boxed{\sf{3\:M }}}\\\)

Answer:

radius = 16 in ; height = 27 in

Taking into account the definition of molarity,  the concentration of Na₃PO₄ in solution is 0.192\(\frac{moles}{lliter}\).

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

\(Molarity=\frac{number of moles}{volume}\)

Molarity is expressed in units \(\frac{moles}{lliter}\).

Being the molar mass of Na₃PO₄ 163.94 g/mole, that is, the amount of mass that a substance contains in one mole, the amount of moles that contains 23.6 g sample of Na₃PO₄ is calculated as:

\(23.6 gramsx\frac{1 mole}{163.94 grams} = 0.144 moles\)

Then you know:

Replacing in the definition of molarity:

\(Molarity=\frac{0.144 moles}{0.750 L}\)

Solving:

Molarity= 0.192\(\frac{moles}{lliter}\)

Finally, the concentration of Na₃PO₄ in solution is 0.192\(\frac{moles}{lliter}\).

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Structural isomers are molecules with the same molecular formula but with different structural formulae. This means that they have the same number and types of atoms, but they are arranged differently. The following two organic compounds are structural isomers of each other.

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Answer:

isn’t it reactants and products?

Explanation:

Answer: reactants and products

Explanation:

Answer:

B

Explanation:

triple beam balance

sorry if i am wrong! can be brainliest?

The option among the given compounds that are the same compound is: Compounds 2 and 3

Th correct option is B.

Compounds are substances that are composed of two or more elements chemically combined together.

Compounds can be formed by the combination of two non-metals or a metal and a non-metal.

Compounds formed from the combination of two non-metals are covalent compounds.

Compounds formed from the combination of a metal and a non-metal are called ionic compounds since they form oppositely-charged ions.

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Number of subshells = 4 , no. of orbitals in each sub shell = 16  for n = 4.

Principal quantum number ( n ) describes the energy level and size of orbital.

Angular quantum number ( l ) tell the shape of orbitals.

for n = 4

l = 0 to ( n-1 ) =  0 ,1,2,3 ( s ,p, d, f)

ml = -l to +l =  ( -3, -2, -1, 0 +1, +2, +3 )

Number of shells = 4 ( 4s 4p 4d 4f )

Number of orbitals = 1 + 3 + 5 + 7

                                = 16

so, each orbital can hold up to two electrons , so the maximum number of electrons  for n = 4 is 16.

Thus , Number of subshells = 4 , no. of orbitals in each sub shell = 16  for n = 4.

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The volume of 12 gas forms when 21 L Cl2 react at STP is 21 L.

To determine the volume of 12 gas (I assume you mean I2 gas) formed when 21 L of Cl2 reacts at STP (standard temperature and pressure), we need to use the ideal gas law equation.

The ideal gas law equation is given by:

PV = nRT

Where:

P = pressure

V = volume

n = number of moles

R = ideal gas constant

T = temperature

At STP, the pressure is 1 atm, and the temperature is 273.15 K.

From the balanced equation, we can see that the molar ratio between Cl2 and I2 is 1:1. So, if 21 L of Cl2 reacts, it will produce an equal volume of I2 gas.

Given that the volume of Cl2 is 21 L, we can assume the volume of I2 gas formed will also be 21 L.

Therefore, the volume of I2 gas formed is 21 L.

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we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

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Answer:

See Explanation

Explanation:

There is a concept in chemistry called the denticity of  a ligand. The denticity of a ligand refers to the number of donor groups in a given ligand that can bond to a central metal atom or ion. In other words, it is the number of bonding positions available in a ligand.

Ammonia has only one bonding position(monodentate ligand); that is, the lone pair on its nitrogen atom. Hence, six ammonia ligands are required to form an octahedral complex with the nickel center.

However, ethylenediamine has two positions available for bonding to a central metal atom or ion. These are the two nitrogen atoms present in the molecule. Hence, each molecule of ethylenediamine is bidentate, bonding to the nickel using two "teeth". Hence, three ethylenediamine molecules form six bonds to the nickel center as required in an octahedral complex.

Decay of Uranium-238 produces gamma radiaton whereas decay of thorium-234 releases beta radiation.

In the decay of U-238, two gamma rays of different energies are emitted in addition to the alpha particle while on the other hand, in the decay of thorium-234 , beta rays are emitted.

So we can conclude that decay of Uranium-238 produces gamma radiaton whereas decay of thorium-234 releases beta radiation.

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Answer:

b or c

Explanation: that is most likly

We can produce more products by;

A. Increasing the concentration of H₂ gas in the reaction vessel

B. Decreasing the temperature in the reaction vessel

C. Removing the H₂O from the reaction vessel as it forms

Water is created through an exothermic process. Heat energy is released when hydrogen gas (H2) and oxygen gas (O2) mix to make water (H2O). An exothermic reaction is characterized by this energy release.

The reaction's overall energy change is negative, which shows that energy is released. The reaction is exothermic because the extra energy is released as heat into the environment.

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Missing parts;

Water can be made using the reversible reaction shown. Which change would

keep this reaction from shifting to form more of the product?

2H₂+022H₂O + energy

A. Increasing the concentration of H₂ gas in the reaction vessel

B. Decreasing the temperature in the reaction vessel

C. Removing the H₂O from the reaction vessel as it forms

D. Increasing the temperature in the reaction vessel

Calculating partial pressures can be done in one of two ways: 1) To determine each gas's unique pressure in a mixture, use PV = nRT. 2) To determine the proportion of pressure from the total pressure that may be assigned to each individual gas, divide the mole fraction of each gas by the total mole fraction.

Partial pressure is calculated using the equation P = (nRT)/V, where P is partial pressure, n is the number of moles of the gas, R is the universal gas constant, T is the temperature, and V is the volume. Add the universal gas constant to the number of gas molecules. R is equal to 0.882 mol K/L atm. Therefore, it can be calculated that the partial pressures of the various gases at sea level, when atmospheric pressure is 760 mmHg, are roughly 593 mmHg for nitrogen, 160 mmHg for oxygen, and 7.6 mmHg.

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Answer:

7.93 × 10⁻¹³ km/s

Explanation:

Step 1: Given data

Rate of growth of the fingernails (r): 2.50 cm/year

Step 2: Convert "r" from cm/year to km/year

We will use the following conversion factors.

\(\frac{2.50cm}{year} \times \frac{1m}{100cm} \times \frac{1km}{1000m} = 2.50 \times 10^{-5} km/year\)

Step 3: Convert "r" from km/year to km/s

We will use the following conversion factors.

\(\frac{2.50 \times 10^{-5} km}{year} \times \frac{1year}{365day} \times \frac{1day}{24h} \times \frac{1h}{60min} \times \frac{1min}{60s} = 7.93 \times 10^{-13} km/s\)

2.50 cm/year is equal to 7.93 × 10⁻¹³ kilometers/second.

Answer:

A) filtration cannot separate dissolved solutes from a solution

B) evaporation

R is the mixture formed by adding 5 g of sugar to 1 L of water.

A mixture is an impure substance made up of two or more substances which are miscible or immiscible in each other.

Dissolving the sugar in the water makes a homogenous mixture and once dissolved a solution is made by the combination of a solute (sugar) and solvent (water).

Hence, R is the mixture formed by adding 5 g of sugar to 1 L of water.

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Answer: 6.75 moles

Explanation:

This is a simple stoichiometry proboe. that I would set up like this:

(13.5 moles CuCI2) (1 mol I2 / 2 moles CuCi2)

That means you all you have to do for this problem is divide by 2 and cancel out the unit moles CuCI2, which leaves you with 6.75 moles I2.

Hope this helps :)

Explanation:

1. Latitude or distance from the equator – Temperatures drop the further an area is from the equator due to the curvature of the earth. In areas closer to the poles, sunlight has a larger area of atmosphere to pass through and the sun is at a lower angle in the sky.

Answer:

omggggggggg that is sooo confusing what grade are you in?

Answer: 8 moles of Fe

Explanation:

If 2 moles oxide give 4 moles Fe, so 4 moles oxide gives 8

The wavelength of the radiation emitted by the argon ion laser is \(4.854 * 10^-7 m\).

Wavelength is a property of any type of wave that refers to the distance between two adjacent points on the wave that is in phase, i.e., at the same point in their respective cycles. It is usually denoted by the Greek letter lambda (λ) and is measured in units of length, such as meters or nanometers.

The energy carried by the photon (E) is related to the wavelength (\(\lambda\)) through the following equation:

\(E=hc/\lambda\); where 'h' is the Plank's Constant and 'c' is the speed of light which is \(3* 10^{-7} m/s\).

We can say that

\(\lambda - hc/E\)

Now after substituting the given values, we get:

\(\lambda = (6.626 * 10^{-34} J.s * 3.00 * 10^8 m/s) / (4.071 * 10^{-19} J)\\\lambda = 4.854 * 10^-7 m\)

Therefore the wavelength of the radiation emitted by the argon ion laser is \(4.854 * 10^-7 m\).

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