Which of the following is not a valid set of quantum numbers?

n = 2, l = 1, m = 0

n = 1, l = 0, m = 0

n = 3, l = 3, m = 3

The molar mass of a gas with a density of 1.02 g/L at 2.13 atm and a temperature of 20°C is 47.9 g/mol.The molar mass of an element or compound is the mass of one mole of that substance. A mole is the SI unit for the amount of a substance.

It's defined as the amount of a substance that contains the same number of entities as there are atoms in 12 grams of carbon-12.Molar mass (M) = mass (m) ÷ amount of substance (n)So, M = m/n

Where m is the mass in grams and n is the number of moles. The unit of molar mass is grams per mole (g/mol).

The ideal gas law is used to calculate the molar mass of a gas. The ideal gas law is:P V = n R T,Where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

Convert the density to grams per liter: 1.02 g/L.

The density is mass/volume, thus 1.02 g/L means that 1 liter of the gas weighs 1.02 g.

This means that 1 mole of gas will occupy 22.4 L (at standard temperature and pressure, STP).Calculate the number of moles of gas using PV = nRT.P = 2.13 atmV = 22.4 L (at STP)R = 0.0821 L·atm/K·molT = 273.15 K + 20 K = 293.15 K

Thus, n = PV/RT = (2.13 atm × 22.4 L)/(0.0821 L·atm/K·mol × 293.15 K) = 0.973 mol

Calculate the molar mass (M) using M = m/n.m = density × volume = 1.02 g/L × 22.4 L = 22.848 gM = m/n = 22.848 g/0.973 mol = 23.5 g/mol Convert to units of grams per mole: 23.5 g/mol

The molar mass of a gas with a density of 1.02 g/L at 2.13 atm and a temperature of 20°C is 47.9 g/mol.

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The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg

To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:

F = (G * m1 * m2) / \(r^{2}\)

where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.

Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):

1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)

Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.

The question was incomplete. find the full content below:

Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid

A. 3.4 x \(10^{11}\) kg

B. 8.3 x \(10^{12}\) kg

C. 1.2 x \(10^{12}\) kg

D. 1.2 x \(10^{10}\) kg

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The molecular formula : As₄S₆

Given

Rate of effusion of arsenic(III) sulfide = 0.28 times the rate of effusion of Ar atoms

Required

The molecular formula

Solution

Graham's law: the rate of effusion of a gas is inversely proportional to the square root of its molar masses or  

the effusion rates of two gases = the square root of the inverse of their molar masses:  

\(\rm \dfrac{r_1}{r_2}=\sqrt{\dfrac{M_2}{M_1} }\)

or  

\(\rm M_1\times r_1^2=M_2\times r_2^2\)

Input the value :

1 = Arsenic(III) sulfide

2 = Ar

MM Ar = 40 g/mol

0.28 = √(40/M₁)

M₁=40 : 0.28²

M₁=510 g/mol

The empirical formula of arsenic(III) sulfide =  As₂S₃

(Empirical formula)n = molecular formula

( As₂S₃)n = 510 g/mol

(246.02 g/mol)n = 510 g/mol

n = 2

So the molecular formula : As₄S₆

Answer:

an inference is an educated answer based on a piece of information you have been given

Explanation:

e.g. they had pigtails in their long blonde hair.

from this we can infer that I am speaking about a girl

They have no definite shape and no definite volume because they are gases.

Gases have no definite shape and no definite volume because they are present in free state. Those substances that are close together and held tightly have definite shape and volume.

So we can conclude that they have no definite shape and no definite volume because they are gases.

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Answer:

A

Explanation:

bc

After adding the next amounts of NH, the final solution's pH was 4.98. Strong acid plus weak base equals an acidic pH, which is supported by this.

If you'll note, NH3 and HNO3 have the same volume and concentration, while HNO3 only contains one H.

As a result, you should persuade yourself that these react exactly as they should because their mol quantities are equivalent.

Make use of the following equation to determine pH:

pH = -log [H+]

The pH formula can be used to determine the pH of a chemical solution and how acidic or basic it is: pH equals -log10[H 3 O +]. Anything below 7 is acidic, and everything over 7 is basic. Learn how to calculate the pH of any chemical solution using the procedures listed below.

To Identify pH true meaning:

The concentration of hydrogen ions in a solution is determined by the pH scale. A solution having a lot of hydrogen ions in it is acidic. Normally, the pH scale is displayed from 0 to 14. The solution is more straightforward the larger the number.

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Answer:

b or c but I would just pick c

Answer:

C

Explanation:

Sun is an energy source not a matter.

Answer:

E. The ratio of [HNO2] / [NO2-] will increase

D. The pH will decrease.

Explanation:

Nitrous acid ( HNO₂ ) is a weak acid and NaNO₂ is its salt . The mixture makes a buffer solution .

pH = pka + log [ salt] / [ Acid ]

= 3.4 + log .32 / .42

= 3.4 - .118

= 3.282 .

Now .16 moles of nitric acid is added which will react with salt to form acid

HNO₃ + NaNO₂ = HNO₂ + NaNO₃

concentration of nitrous acid will be increased and concentration of sodium nitrite ( salt will decrease )

concentration of nitrous acid = .42 + .16 = .58 M

concentration of salt = .32 - .16 = .16 M

ratio of [HNO₂ ] / NO₂⁻]

= .42 / .32 = 1.3125

ratio of [HNO₂ ] / NO₂⁻] after reaction

= .42 + .16 / .32 - .16

= 58 / 16

= 3.625 .

ratio will increase.

Option E is the answer .

pH after reaction

= 3.4 + log .16 / .58

= 2.84

pH will decrease.

A. A force that acts on a body moving in a circular path

The potential energy of the pendulum can be modeled off of the basic equation PE = mgh.

where h is the height and g is the acceleration brought on by gravity. This equation is frequently used to simulate items falling freely.The pendulum is not falling freely; instead, it is restrained by the rod or string.

As a result, we must express the height in terms of the angle and the pendulum's length L. Therefore, h = L(1 - COS) The formula for kinetic energy is KE= 12mv2, where m is the pendulum's mass and v is its speed. The pendulum is temporarily immobile when it is at its highest point (Point A).

There is no kinetic energy in the pendulum; all of its energy is gravitational potential energy. If friction and other non-conservative factors are ignored, we see that in a straightforward.

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Answer:

They all contain switches

Answer: D. they all contain resonators.

Explanation:

Answer:

they will have 100% kinetic energy

Explanation:

all the potential energy has been used when it is at the bottom of the ramp

Answer:

Yes.

Explanation:

Substances are made up of matter or matter are made up of tiny molecules or atoms that occur naturally or some are synthetic or man made.

All matter are made up of substances called elements and each elements have its own physical and chemical properties and cannot be broken easily by ordinary chemical reactions.

Of all the 118 elements only 92 occur naturally and 26 are man made or synthetic which are made in the laboratories.

Answer:

C. Golden rice enriched with vitamin A

The given question is not complete, the complete question is:

Solving applied density problems Mr. Auric Goldfinger, criminal mastermind, intends to smuggle several tons of gold across International borders by disguising it as lumps of iron ore. He commands his engineer minions to form the gold into little spheres with a diameter of exactly 6 cm and paint them black However, his chief engineer points out that customs officials will surely notice the unusual weight of the "iron ore" if the balls are made of solid gold (density 19.3 g/cm'). He suggests forming the gold into hollow balls Instead (see sketch at right), so that the fake "Iron ore" has the same density as real iron ore (5.15 g/cm'). One of the balls of fake iron ore," sliced in half Calculate the required thickness of the walls of each hollow lump of iron ore. Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits.

Answer:

The correct answer is 0.29 cm.

Explanation:

To produce fake iron balls that is, formed of gold there is a need to make sure that the mass of the iron ball should be equivalent to the mass of the fake ball.  

To calculate the volume of iron ball with the help of the given diameter, the formula to be used is 4/3πr³. The diameter of the spheres mentioned in the given question is 6 cm, so the radius will be 6/2= 3 cm.  

Now, the volume of the iron ball would be = 4/3 × 3.14 × 3³ = 113.04 cm³

To determine the mass of the iron ball, the formula to be used is volume * density. Now putting the values we get,  

113.04 × 5.15 g/cm³ = 582.156 grams (The density of the iron ore is 5.15 g/cm³)

Now, the mass of the gold ball should also be equal to 582.156 g. The density of the solid gold is 19.3 g/cm³, therefore, the volume of the gold ball by using the above formula would be,  

mass of gold ball = Volume × density

Volume = mass of gold ball / density

Volume = 582.156 g / 19.3 g/cm³

= 30.1635 cm³

Thus, the volume of the hollow sphere would be 30.1635 cm³ with the outer radius as 3 cm, now there is a need to find the inner radius.  

Volume of hollow ball = 4/3π [R³ -r³]

30.1635 cm^3 = 4/3 pie [3³ = r³]

30.1635 × 3/4 × 3.14 = 27-r³

7.2046 = 27-r³

r³ = 19.7954

r = 2.7051 cm

Hence, the thickness would be outer radius - inner radius = 3-2.7051 = 0.2949 cm or 0.29 cm.  

Answer:

Wavelength (typically measured in nanometers) is the distance between two points in a wave.Frequency (typically measured in Hertz) is the number of waves in a specific time . Frequency and wavelength have both direct and inverse relationships. The crucial difference between frequency and wavelength is that frequency shows the total number of wave oscillations in a given time. As against wavelength specifies the distance between two specific points of a wave.

Explanation:

Frequency is how often something changes per second be it amplitude of a voltage on a wire or be it the bobbing back and forth of a bobblehead. Frequency is how often something moves up and down in a second. If a bobble head moves forward and backward in one second then it has a bobbling frequency of 1 Hertz (Hz). The unit of frequency is Hertz (Hz) or # of cycles or oscillations per second. A wavelength is measured in distance like meters (m). For photons or light or radiowaves the equation is wavelength=speed of light/frequency.

Answer:

Wavelength (typically measured in nanometers) is the distance between two points in a wave, while frequency is how often something changes per second be it amplitude of a voltage on a wire or be it the bobbing back and forth of a bobblehead.

Answer:

4moles

Explanation:

2moles produces 2moles of H2

then 4moles (72g) produces 8 grams H2

Answer:

Bromine forms covalent bonds because it has seven valence electrons, but neon has eight valence electrons and already fulfills the octet rule. Neutral atoms coming together to share electrons.

Hoped this helped

Answer:

the answer is A btw

Explanation:

The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

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The thinner and denser layer labelled "2" in the diagram represents the marine crust, while the thicker and less dense layer labelled "1" represents the continental crust. Therefore, A. 1; 2 is the right response.

The land on Earth is made up of the continental crust, which is less dense, thicker (between 35 and 70 km), and primarily composed of the rock granite. The majority of the ocean is made up of oceanic crust, which is denser, thinner (5–7 km), and primarily composed of the rock basalt.

With a density of around 2.7 grammes per cubic cm, continental crust has a largely granitic composition and is slightly lighter than Oceanic crust has a density of roughly 2.9 to 3 grammes per cubic centimetre and is composed of basalt, which is richer in iron and magnesium than granite.

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Answer:

The first image = double replacement

Second = single replacement

Third = Decomposition

Fourth = Combination

Explanation:

1. a color from each pair is being swapped and replacing each other so there is a double replacement

2. only the blue and the red are changing places so it is single replacement

3. the pair is being separated (decomposed)

4. the red and green are coming together (combined)

The volume of the KOH required to neutralize 40.0 mL of a 0.035 M H2sO4 solution is 0.0215 L.

Concentration is the abundance of a constituent divided by way of the overall volume of an aggregate. several sorts of mathematical descriptions may be outstanding: mass concentration, molar concentration, variety concentration, and extent awareness.

Given

V1 =?

C₁ = 0.65 M

C₂ = 0.035 M

n -2

V2 = 40 ml  = 0.04 L

C₁V₁ = C₂V₂

V₁ = C₂V₂/ C₁

    =   0.035 * 0.04 / 0.065

    =  0.0215 L

The concentration of a substance is the quantity of solute found in a given amount of solution. Concentrations are normally expressed in terms of molarity, defined because of the variety of moles of solute in 1 L of answer.

The Concentration of an answer is a measure of the quantity of solute that has been dissolved in a given amount of solvent or answer. A concentrated answer is one that has a rather huge quantity of dissolved solute.

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\(\text{Ammonia has been studied as an alternative "clean" fuel for internal combustion}\)

\(\text{engines, since its reaction with oxygen produces only nitrogen and water vapor,}\)

\(\text{and in the liquid form it is easily transported. An industrial chemist studying this}\)

\(\text{reaction fills a} \ \mathbf{100 \ L }\ \text{tank with} \ \mathbf{8.6 \ mol} \ \text{of ammonia gas and} \ \mathbf{28 \ mol} \ \ \text{of oxygen gas, }\)

\(\text{to be} \ \mathbf{2.6\ mol} \ .\ \text{Calculate the concentration equilibrium constant for the combustion of}\)

\(\text{ammonia at the final temperature of the mixture. Round your answer to 2 significant digits.}\)

Answer:

Explanation:

From the correct question above:

The reaction can be represented as:

\(\mathbf{4 NH_3_{(g)}+ 3O_{2(g)} \iff 2N_{2(g)}+ 6H_2O_{(g)} }\)

From the above reaction; the ICE table can be represented as:

                    \(\mathbf{4 NH_3_{(g)}+ 3O_{2(g)} \iff 2N_{2(g)}+ 6H_2O_{(g)} }\)

I (mol/L)     0.086            0.28                 0              0

C                   -4x                -3x               +2x           +6x

E                 0.086 - 4x     0.28 - 3x      +2x             +6x

At equilibrium;

The water vapor = \(\dfrac{2.6 \ mol}{100 \ L} = 6x\)

\(x = \dfrac{2.6}{100} \times \dfrac{1}{6}\)

\(x = 0.00433\)

\(\text{equilibrium constant} ({k_c}) = \dfrac{ [N_2]^2 [H_2O]^6 }{ [[NH_3]^4] [O_2]^3 }\)

\(\implies \dfrac{(2x)^2 (6x)^6}{(0.086-4x)^4\times (0.28-3x)^3} \\ \\\)

Replacing the value of x, we have:

\(K_c = \dfrac{4 \times 46,656 \times x^8}{(0.086-4x)^4\times (0.28 -3x)^3} \\ \\ K_c = \dfrac{4 \times 46656 \times (0.00433)^8}{(0.06868)^4(0.26701)^3} \\ \\ K_c = \mathbf{5.4446 \times 10^{-8}}\)

\(K_c = \mathbf{5.5 \times 10^{-8} \ to \ 2 \ significant \ figures}\)

This is a good answer:

Answer:

10.3 g Li) / (6.9410 g Li/mol) x (1 mol Li3PO4 / 3 mol Li) / (0.750 mol/L Li3PO4) = 0.6595 L = 660. mL

Explanation:

Answer:

Bromine

Explanation:

Bromine is a chemical element with symbol Br and atomic number 35.