Which statements comparing the Sun and a red supergiant are true? Select the two correct answers.(1 point)

The Sun and a red supergiant have similar luminosity.

The Sun and a red supergiant are of similar size.

The Sun's temperature is higher than that of a red supergiant.

The Sun will outlive a red supergiant.

Answer:

Explanation:

10L

Taking into accoun the ideal gas law, The volume of a container that contains 24.0 grams of N2 gas at 328K and 0.884 atm is 26.07 L.

An ideal gas is a theoretical gas that is considered to be composed of point particles that move randomly and do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:  

P×V = n×R×T

where P is the gas pressure, V is the volume that occupies, T is its temperature, R is the ideal gas constant, and n is the number of moles of the gas. The universal constant of ideal gases R has the same value for all gaseous substances.

In this case, you know:

Replacing in the ideal gas law:

0.884 atm×V= 0.857 moles× 0.082[tex]\frac{atmL}{molK}[/tex] ×328 K

Solving:

[tex]V=\frac{0.857 molesx 0.082 \frac{atmL}{molK}x328 K}{0.884 atm}[/tex]

V= 26.07 L

The volume of a container that contains 24.0 grams of N2 gas at 328K and 0.884 atm is 26.07 L.

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Answer:

[tex]m=397.6gC_8H_{18}}[/tex]

Explanation:

Hello there!

In this case, according to the given chemical reaction, we can set up the heat of reaction per mole of gasoline as shown below:

[tex]\Delta H=\frac{-10,990kJ}{2molC_8H_{18}}=-5495\frac{kJ}{molC_8H_{18}}[/tex]

Now, since the total heat is obtained by multiplying the moles and heat of reaction, we can calculate the moles as shown below:

[tex]n=\frac{Q}{-\Delta H } \\\\n=\frac{19,126kJ}{-(-5495\frac{kJ}{molC_8H_{18}} )} \\\\n=3.48molC_8H_{18}}[/tex]

Finally, since the molar mass of gasoline is 114.22 g/mol, we can easily calculate the mass as follows:

[tex]m=3.48molC_8H_{18}} *\frac{114.22gC_8H_{18} }{1molmolC_8H_{18}} } \\\\m=397.6gC_8H_{18}}[/tex]

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Answer:

The equilbrium constant is 179.6

Explanation:

To solve this question we can use the equation:

ΔG = -RTlnK

Where ΔG is Gibbs free energy = 12.86kJ/mol

R is gas constant = 8.314x10⁻³kJ/molK

T is absolute temperature = 298K

And K is equilibrium constant.

Replacing:

12.86kJ/mol = -8.314x10⁻³kJ/molK*298K lnK

5.19 = lnK

e^5.19 = K

179.6 = K

Answer:

The energy level diagram is used to represent the energy states available in each atom. When an electron is in an energy state, it emits nor absorbs radiation. A photon is emitted or absorbed when an electron transitions from one energy state to another.

Explanation:

Answer:

A solution of sugar that contains the maximum amount of sugar that will dissolve is a saturated solution.

Explanation:

A saturated solution is a solution that contains as much solute as can dissolve in a given solvent at a given temperature.

for you the solute is sugar

As the chemical reaction proceeds, a gas is formed with the water molecule and CH₃COONa, so the mass of the remaining solid product is less than 345 g.

Stoichiometry tells about the relative amount of reactants and products before and after the reaction in terms of coefficient.

Given chemical reaction is:

NaHCO₃ + CH₃COOH → CH₃COONa + CO₂ + H₂O

From the stoichiometry of the reaction it is clear that 1 mole of both the reactants will form products. And for the formation of product amounts of the reactants get wholly consumed. From 345 grams of reactants carbon dioxide gas, water and sodium acetate salt is formed, so the mass of this formed salt is less than 345 grams.

Hence, option (C) is correct i.e. less that 345g.

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Answer:

mixtures are physically combined structures that are separated into their original components. A chemical substance is composed of one type of atom or molecule. A mixture is composed of different types of atoms or molecules that are not chemically bonded.

Explain:

yw

ask your mom and your family

Answer:

Kc = 0.5951 (4 sig. figs.)

Explanation:

For A + B ⇄ C + D at standard thermodynamic conditions (298K, 1atm)

ΔG = ΔG° + R·T·lnQ => 0 = ΔG° + R·T·lnKc => ΔG° = - R·T·lnKc

=> lnKc = - ΔG°/R·T

ΔG° = +12.86 Kj/mol

R = 8.314 Kj/mol·K

T = 298K

lnKc = - (+12.86Kj) / (8.314Kj/mol·K)(298K) = - 0.519 mol⁻¹

Kc = e⁻⁰°⁵¹⁹ mol⁻¹ = 0.5957 mol⁻¹ (4 sig. figs.)

Answer:

C???

Explanation:

Answer: if this is true or false, then this is false, something that is cold has slow moving particles, fast moving ones generate heat which will make it warm, this object has potential energy not kinetic.

Answer:

Br₂ + 2e⁻  ⇄  2Br⁻    Half reaction of reduction

2I⁻ ⇄  2e⁻  +  I₂   Half reaction of oxidation

Br₂ + 2I⁻ +  2K⁺  ⇄   I₂  +  2Br⁻  + 2K⁺

Explanation:

This is an easy redox reaction:

Br₂  +  2KI →  I₂  +  2KBr

We determine the oxidation states.

0 for the elements at ground state.

K does not change the oxidation state during the reaction.

Bromine is reduced to bromide (oxidation state decreases)

and iodide is oxidized to Iodine (oxidation state increases)

Br₂ + 2e⁻  ⇄  2Br⁻    Half reaction of reduction

2I⁻ ⇄  2e⁻  +  I₂   Half reaction of oxidation

In oxidation, electrons are released while in reduction, the electrons are gained. To make the ionic equation, we just add K⁺

So we sum both reactions

Br₂ + 2e⁻ + 2I⁻ +  2K⁺  ⇄  2e⁻  +  I₂  +  2Br⁻  + 2K⁺

We cancel the electrons on both sides of the equation:

Br₂ + 2I⁻ +  2K⁺  ⇄   I₂  +  2Br⁻  + 2K⁺

Answer: 0.5 mol h2o

Explanation: Hope this help :D

Answer:

A & B

Explanation:

This is because insulators just keep the house warm, while rheostats just control the current in the house. The circuit breakers and fuses, can stop something like a fire faster than the other two just by turning them off. Making them safety features in a house! Hope this helps! Plz mark as brainliest!

Answer:

circuit breakers and fuses

Explanation:

Circuit breakers and fuses are very similar as they are both designed to protect a circuit from an overload or short-circuit

The formulas for the binary ionic compounds are:

We want to write the formulas of different binary ionic compounds. to do so, we need to consider the octet's rule.

The octet's rule establishes that atoms will lose, gain or share electrons to achieve the electron configuration of the nearest noble gas (8 valence electrons except for He with 2).

K has 1 valence electron so it will lose 1 electron to form K⁺. I has 7 valence electrons so it will gain 1 electron to form I⁻. The neutral compound between K⁺ and I⁻ is KI.

Mg has 2 valence electrons so it will lose 2 electrons to form Mg⁺². Cl has 7 valence electrons so it will gain 1 electron to form Cl⁻. The neutral compound between Mg⁺²⁺ and Cl⁻ is MgCl₂.

Na has 1 valence electron so it will lose 1 electron to form Na⁺. S has 6 valence electrons so it will gain 2 electrons to form S⁻². The neutral compound between Na⁺ and S⁻² is Na₂S.

Al has 3 valence electrons so it will lose 3 electrons to form Al³⁺. S has 6 valence electrons so it will gain 2 electrons to form S⁻². The neutral compound between Al³⁺ and S⁻² is Al₂S₃.

Al has 3 valence electrons so it will lose 3 electrons to form Al³⁺. N has 5 valence electrons so it will gain 3 electrons to form N³⁻. The neutral compound between Al³⁺ and N³⁻ is AlN.

The formulas for the binary ionic compounds are:

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Answer:

Explanation:

Pairing of a specific purine to a pyrimidine is due to the structure and properties of these bases. A and G are purines and T and C are pyrimdines. In DNA base pairing, A pairs with T and C with G.

Answer:

0.285577616426424

Explanation:

Hope this helps!

Answer:

2.54 L

Explanation:

Step 1: Write the balanced neutralization equation

6 HCl + Fe₂O₃ → 3 H₂O + 2 FeCl₃

Step 2: Calculate the moles corresponding to 339 g of Fe₂O₃

The molar mass of Fe₂O₃ is 159.69 g/mol.

339 g × 1 mol/159.69 g = 2.12 mol

Step 3: Calculate the moles of HCl that react with 2.12 moles of Fe₂O₃

The molar ratio of HCl to Fe₂O₃ is 6:1. The reacting moles of HCl are 6/1 × 2.12 mol = 12.7 mol

Step 4: Calculate the volume of HCl

12.7 moles are in 5.00 M (5.00 mol/L) HCl. The required volume is:

12.7 mol × 1 L/5.00 mol = 2.54 L

Answer:

C. Carbon monoxide

This is my answer tell me if wrong

Ammonia among all the gases effuses most rapidly. Therefore, the correct option is option d.

A gas can escape or flow through a small aperture into a vacuum or a region with lower pressure through a process called effusion. It is a specific kind of gas flow that takes place in those circumstances. The square root of a gas's molar mass has an inverse relationship with the rate of effusion of that gas. The gas will effuse more quickly the lower the molar mass.

The molar mass are calculated as:

a. hydrogen chloride (HCl): H (1 g/mol) + Cl (35.5 g/mol) = 36.5 g/mol

b. nitrogen (N2): N (14 g/mol) + N (14 g/mol) = 28 g/mol

c. carbon monoxide (CO): C (12 g/mol) + O (16 g/mol) = 28 g/mol

d. ammonia (NH3): N (14 g/mol) + H (1 g/mol) + H (1 g/mol) + H (1 g/mol) = 17 g/mol

e. oxygen (O2): O (16 g/mol) + O (16 g/mol) = 32 g/mol

The square root of the molar masses are given as:

a. √36.5 ≈ 6.04

b. √28 ≈ 5.29

c. √28 ≈ 5.29

d. √17 ≈ 4.12

e. √32 ≈ 5.66

Ammonia has the lowest molar mass and hence the fastest effusion rate of all the gases.

Therefore, the correct option is option d.

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Answer

0.32 is that answer

Explanation:

you just use the calculator

Answer:

b is the best in my opion

Explanation:

6 CsOH + Fe2(SO3)3 = 2 Fe(OH)3 + 3 Cs2SO3

Answer:

Explanation:

You actually are being pulled towards everything and everything is being pulled towards you.  Everything exerts a gravitational force, but our force and the force of the objects around us is not strong enough to actually move objects

Answer:

The empirical formula of the oxide is CuO

Explanation:

Copper(II) oxide or cupric oxide is the inorganic compound with the formula CuO

Answer: potassium and sodium have similar properties

Explanation: Na and K belong to alkali metals. Both have one electron in outer shell. Calcium has two electrons in outer shell.

Answer:

Sodium citrate is a compound with a total of 21 atoms

Answer:

Answer. Explanation: Chlorine gas bleaches the damp litmus (red or blue). Bleaching is an oxidation process.

Answer:

- Proper urine flow by signalling the kidney cells.

- They act as mechanoreceptors or sensory receptors.

Explanation: