Based on the map shown below, which city is located
closest to where the earthquake actually started?

A.Los angles
B.Portland
C.Salt lake city

4.21 moles of SnO₂ are needed to produce 500.0 grams of Sn for the given reaction.

Tin oxide, is a compound with the formula SnO₂. It is a white or gray powder that is insoluble in water but soluble in strong acids and strong alkalis. Tin oxide is widely used as a pigment in ceramics, glasses, and paints, and in the manufacture of electronic devices such as transistors and solar cells. It is a versatile compound with a wide range of uses and can undergo several important reactions such as: Reduction to tin metal, formation of tin dioxide, formation of tin salts by reaction with acids.

For the given reaction:

SnO₂ + 2H₂ → Sn + 2H₂O

Mole ratio of SnO₂ and Sn is 1:1; this means 1 mole of SnO₂ is required to prepare each mole of Sn.

Now, for the moles of Sn:

n = m/M

Where, n = number of moles

m = mass of Sn (500 g)

M = molar mass of Sn (118.71 g/mol)

n = 500/118.71

n = 4.21 moles

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The required volume flow rate of liquid ethyl alcohol to supply at a rate of 2000 kJ/s is approximately 164.9 L/min.

To determine the required volume flow rate of liquid ethyl alcohol, we need to calculate the fuel flow rate first. Then, we can convert it to volume flow rate.

Given:

Rate of energy release (Q) = 2000 kJ/s

Excess air = 40% (or 0.4)

First, let's calculate the fuel flow rate (m f):

Q = m f × Lower Heating Value (LHV)

The Lower Heating Value (LHV) for ethyl alcohol can be calculated using the enthalpy of vaporization:

LHV = enthalpy of vaporization / molecular weight of fuel

LHV = 42,340 kJ/k mol / 46.07 kg/k mol = 920.11 kJ/kg

Now, we can calculate the fuel flow rate:

m f = Q / LHV

m f = 2000 kJ/s / 920.11 kJ/kg ≈ 2.173 kg/s

Next, let's convert the fuel flow rate to volume flow rate:

Volume flow rate (V f) = m f / density

V f = 2.173 kg/s / 790 kg/m³ = 0.002749 m³/s

Finally, we can convert the volume flow rate to L/min:

V f = 0.002749 m³/s × (1000 L/1 m³) × (60 s/1 min) ≈ 164.9 L/min

Therefore, the required volume flow rate of liquid ethyl alcohol to supply at a rate of 2000 kJ/s is approximately 164.9 L/min.

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Answer:

The correct answer would be -

17. 50% chances of round offspring

18. 25% chances two copies of dominant allele in the genotype of offspring

Explanation:

17. In this question it is stated that the Spongebob is heterozygous and has a square body which means the square body is dominant over the round that is present in sponge Susie that means she has two copies of the recessive allele.

S for square trait and s for a round trait then

    S     s

s Ss    ss

s Ss    ss

Thus, the correct answer is 50 percent as there are only two copies of ss.

18. in this question Patric and Patti both have heterozygous for the pink (P) body-color dominant over yellow (p). The chances for the true-breeding dominant genotype would be -

     P    p

P   PP  Pp

p   Pp  pp

There is only one out of four rue-breeding dominant offspring will be produced.

Answer:

The first one - Vacuoles

Explanation:

Hope this helps. :)

In a liquid-liquid extraction (LLE) system with loratadine and pseudoephedrine sulfate, the choice of organic and aqueous phases is crucial for efficient separation.

Loratadine is a non-polar compound, while pseudoephedrine sulfate is more polar due to the presence of a sulfate group. To achieve effective separation, we need to choose a suitable organic phase and aqueous phase.

For the organic phase, a non-polar solvent such as diethyl ether, ethyl acetate, or chloroform can be used. These solvents have good solubility for loratadine. The non-polar organic phase will extract loratadine from the mixture, allowing for separation from the aqueous phase.

As for the aqueous phase, we need to choose a polar solvent that will selectively extract pseudoephedrine sulfate. Aqueous solutions of acids like hydrochloric acid (HCl) or sulfuric acid (H2SO4) can be used. The acidic conditions protonate the pseudoephedrine sulfate, making it more soluble in the aqueous phase.

To perform the extraction, the mixture of loratadine and pseudoephedrine sulfate is added to the LLE system consisting of the organic phase (non-polar solvent) and the aqueous phase (acidic solution). The mixture is then vigorously shaken to ensure thorough mixing and extraction.

After shaking, the phases are allowed to separate, with the more dense aqueous phase settling at the bottom and the less dense organic phase on top. The layers can be carefully separated, and each phase can be further processed to isolate the desired compounds.

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The density of H2SO4 is 1.119 g/mL, and the molal concentration is 1.94 m.

We can use the following formula to find the molar concentration of the solution:      

    Molality (m) = Moles of solute / Mass of solvent in kg                  

                 = (mass of solute in grams) / (molar mass of solute × mass of solvent in kg)

the molar mass of H2SO4 as follows:

Molar mass of H2SO4 = 2(1.00794 g/mol of H) + 32.066 g/mol of S + 4(15.9994 g/mol of O)                      

            = 98.079 g/mol

Now, we can find the mass of solvent in kg as follows:

    Let's take 1000 g of the solution, and we know that the density of the solution is 1.119 g/mL.

So, 1000 g of solution contains 1000/1.119 = 893.04 mL of the solution, which is equal to 0.89304 L of the solution.

So, mass of solvent in 0.89304 L of the solution = (0.89304 L × 1.119 g/mL) - (mass of solute in 0.89304 L of the solution)                            

          = 1.0 kg (approx)

Now, we can find the number of moles of H2SO4 in 1 kg of the solvent as follows:

     Number of moles of H2SO4 = molality × mass of solvent in kg                      

                        = 1.94 × 1 kg of solvent                      

                        = 1.94 mol

Hence, the molar concentration of the solution is equal to the number of moles of solute per liter of the solution.

Molar concentration of H2SO4 solution = (Number of moles of solute) / (Volume of the solution in liters)                                                                                      

      = 1.94 mol / 0.89304 L                                            

      = 2.18 M

Therefore, the molar concentration of this solution is 2.18 M (Approx).Thus, the detailed answer to this question has been provided.

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Answer:

Lattice energy is an estimate of the bond strength.

Answer:

The correct answer is C.) 67% sulfur and 33% oxygen

Explanation:

The total mass of the compound is 40 grams of sulfur + 60 grams of oxygen = 100 grams. To find the percent composition of sulfur, we divide 40 grams by 100 grams and multiply by 100:

(40 g / 100 g) * 100% = 40%

To find the percent composition of oxygen, we divide 60 grams by 100 grams and multiply by 100:

(60 g / 100 g) * 100% = 60%

So the compound contains 67% sulfur and 33% oxygen.

Answer:

3.48 g

Explanation:

Because its useful.

Answer:

positive charge

Explanation:

protons are the positive chargers of any chemical reaction unlike neutron which are just the neutral part

Answer:

Positive charge

Explanation:

Electrons are Negative charge

Consider a reaction that produces a significant amount of hydrogen ion and is to be carried out a pH 7. The acid would serve as the optimum buffer for this reaction is the acid A.

The pH = 7

The pka value of the acid A = 6.3

The pka value of the acid B = 7.3

The buffer range is given as :

For acid A = (pka + 1 ) to (pka - 1)

The optimal buffer range is the range of the buffer in the dissociation constant of the weak acid to the buffer pka plus or the minus pH unit.

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Answer:

becuase in order to work you need power and electricity

Explanation:

if you dont have power you cant work

The empirical formula of the compound is CH2O.

To find the empirical formula of the compound, we need to determine the ratios of the atoms in the compound. To do this, we need to find the number of moles of each element present in the compound.

The molar mass of carbon is 12.01 g/mol, the molar mass of hydrogen is 1.008 g/mol, and the molar mass of oxygen is 16.00 g/mol. The number of moles of carbon in the sample is:0.1565 g × 1 mol/12.01 g ≈ 0.0130 mol. The number of moles of hydrogen in the sample is:0.02627 g × 1 mol/1.008 g ≈ 0.0261 molThe number of moles of oxygen in the sample is:

0.4170 g × 1 mol/16.00 g ≈ 0.0261 mol

Now that we know the number of moles of each element, we can determine the simplest whole number ratio of the elements in the compound. We can do this by dividing each number of moles by the smallest number of moles. In this case, the smallest number of moles is 0.0130 mol.

We get:

Carbon: 0.0130 mol ÷ 0.0130 mol = 1

Hydrogen: 0.0261 mol ÷ 0.0130 mol = 2

Oxygen: 0.0261 mol ÷ 0.0130 mol = 2

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The effective nuclear charge (Zeff) felt by an electron in the 3s orbital of Na can be estimated using the formula Zeff = Z - S, where Z is the atomic number and S is the screening constant. For Na, Z is 11 and the screening constant for the 3s orbital is approximately 1.69.

Therefore, Zeff would be approximately 9.31. This means that the electron in the 3s orbital of Na would experience an effective nuclear charge of 9.31, which is less than the full nuclear charge of 11 due to the shielding effect of the other electrons in the atom.
The approximate effective nuclear charge (Zeff) felt by an electron in the 3s orbital of sodium (Na) can be determined using Slater's rules. Sodium has an atomic number (Z) of 11, which means it has 11 electrons. For the 3s electron, we consider the shielding effect from the inner (1s and 2s) and same-level (3s and 3p) electrons.

According to Slater's rules, the 1s and 2s electrons contribute 1.0 and the 3s and 3p electrons contribute 0.35 each to the shielding effect. Since there are 2 inner electrons (1s²) and 8 same-level electrons (2s² 2p⁶), the shielding effect is calculated as (2x1.0) + (8x0.35) = 4.8.

Finally, the Zeff is estimated by subtracting the shielding effect from the atomic number: Zeff = Z - shielding = 11 - 4.8 = 6.2. So, the approximate Zeff felt by an electron in the 3s orbital of Na is 6.2.

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Answer:

CH₂

Explanation:

From the question given above, the following data were obtained:

Mass of compound = 1 g

Mass of CO₂ = 3.14 g

Mass of H₂O = 1.29 g

Empirical formula =?

Next, we shall determine the mass of Carbon and hydrogen present in the compound. This can be obtained as follow:

For Carbon, C:

Mass of CO₂ = 3.14 g

Molar mass of CO₂ = 12 + (2×16)

= 12 + 32

= 44 g/mol

Molar mass of C = 12 g/mol

Mass of C =?

Mass of C = molar mass of C/ Molar mass of CO₂ × Mass of CO₂

Mass of C = 12/44 × 3.14

Mass of C = 0.86 g

For hydrogen, H:

Mass of C = 0.86 g

Mass of compound = 1 g

Mass of H =?

Mass of H = (Mass of compound) – (mass of C)

Mass of H = 1 – 0.86

Mass of H = 0.14 g

Finally, we shall determine the empirical formula of the cyclopropane. This can be obtained as follow:

Mass of C = 0.86 g

Mass of H = 0.14 g

Divide by their molar mass

C = 0.86 / 12 = 0.07

H = 0.14 / 1 = 0.14

Divide by the smallest

C = 0.07 / 0.07 = 1

H = 0.14 / 0.07 = 2

Thus, the empirical formula of cyclopropane is CH₂

The electron configuration of a potassium atom at ground state is 1s²2s²2p⁶3s²3p⁶4s¹. Therefore, option D is correct.

The electron configuration of an element can be explained as electrons being occupied in different energy levels of an atom of a specific element. In the electron configuration, the electrons are usually written as a superscript of atomic subshells. For example, the electron configuration of Helium can be represented as 1s²2s².

The sequence of completely filled subshells similar to neighboring the electronic configuration of a noble gas is represented by square brackets. The principal quantum number (n) will be used to denote the maximum number of electrons in an electron shell.

The total number of electrons occupied in the given electronic configuration  1s²2s²2p⁶3s²3p⁶4s¹  is 19. The atomic number of potassium is 19 therefore it is the configuration of potassium.

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Answer:

"Water and ethyl alcohol will both have dipole-dipole interactions.

Technically they will both have Hydrogen bonding, which is a type of dipole-dipole. This is due to the high electronegativity values of oxygen atoms compared to the carbon and hydrogen atoms the oxygens bond to. This causes regions of both of these molecules that have partial negative charges and other regions wind up with partial positive charges.

Hexane will not have any dipole-dipole interactions because it is a non-polar molecule. The intermolecular forces between hexane molecules will be dispersion forces."

Explanation:

Here is the place I found the answer:  https://socratic.org/questions/which-of-these-structures-has-dipole-dipole-interactions-water-h2o-ethyl-alcohol

All of this answer belongs to that person. I do not own any of this information.

Yes, I believe that Celebrations may have violated the law by not providing John Silbert with a reasonable accommodation for his disability during the interview process.

Employers are required by the Americans with Disabilities Act (ADA) to make reasonable accommodations for people with disabilities, including providing interpreters for job interviews. Celebrations might have participated in discriminatory hiring practices that are against the law by not responding to John's request for an interpreter and instead hired hearing people. Employers must be aware of their ADA duties and make reasonable modifications in order to guarantee equal opportunity for people with disabilities.

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Taking into account the definition of calorimetry, the correct answer is the third option:  The heat exchanged is 10,450 J.

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).

The amount of heat (Q) necessary to vary the temperature of a mass (m) of a substance is proportional to the change in its temperature (∆T) and to that mass. So, the equation that allows calculating heat exchanges is:

Q = c× m× ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case, you know:

Replacing in the expresion for calorimetry:

Q = 4.18\(\frac{J}{gC}\)× 100 g× 25 C

Solving:

Q= 10,450 J

Finally, the correct answer is the third option:  The heat exchanged is 10,450 J.

Learn more:

Answer:

He numbered these orbits due to their location.

Explanation:

Scientist Neil Bohr in his atomic model describes that electrons are moving with high velocity in circular paths around the nucleus is called shells or orbits. As long as electrons are in their particular orbit their energy is constant. He named those orbits as K- shell, L- shell and M- shell etc. When the electron absorb energy, it is able to jump to the next shell and comes back to its original shell when it loses energy. He also give numbers i.e. 1,2,3,4 to the shells due to their nearness to the nucleus. Shell 1 is near to the nucleus whereas shell 4 is farther from the nucleus.

The arrow that most closely describes the question "the absorption with the lowest energy" is a downward-pointing arrow ↓.

In spectroscopy, particularly in electronic transitions, absorption refers to the process where a molecule or atom absorbs electromagnetic radiation, typically in the form of photons, causing the promotion of an electron from a lower energy level to a higher energy level. The energy difference between the two levels determines the energy of the absorbed photon.

When considering the absorption with the lowest energy, it implies that the absorbed photons have the lowest energy among the available energy levels. In this context, the downward-pointing arrow (↓) is used to represent the absorption of lower energy photons.

In spectroscopic diagrams or energy level diagrams, the upward-pointing arrow (↑) is typically used to represent the absorption of higher energy photons. However, since the question specifically asks for the absorption with the lowest energy, the appropriate arrow would be a downward-pointing arrow (↓).

Therefore, the arrow that most closely describes the question "the absorption with the lowest energy" is a downward-pointing arrow ↓.

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Due to its very symmetric structure, BF3 (Boron Trifluoride) is non-polar. Because of its triangular planar structure, the three BF bonds' individual dipole moments cancel out, bringing the compound's overall dipole moment to zero.

Al-Cl, Si-Cl, Ni-P, Cu-Br

The difference in the electronegativity of the components determines the polarity of a bond. The propensity of an atom to gain an electron and form an anion or to have an electron nearby when in a covalent bond (sharing electrons) is known as this attribute.

The atom will find it more challenging to attract an electron the bigger the atomic radius since the attractive force will be less powerful. In the periodic table, the electronegativity rises from left to right and from bottom to top.

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Answer:

1.096g

Explanation:

You must know the atomic mass of Hydrogen, Fluorine, and Sodium before you can start:

Hydrogen: 1.008g/mol

Fluorine: 18.99g/mol

Sodium: 22.98g/mol

Next, find the composition percentage of NaF

22.98 + 18.99 = 41.97

Fluorine is 18.99/41.97 =45.25%

Sodium is 100-45.25 = 54.75%

Ultimately we want to know about HF so find how much F is in 2.3g: 2.3 * 0.4525 = 1.041g

Find comp. percentage of HF

18.99+1.008 = 19.998; H/total F/total

Hydrogen 5.041%

Fluorine 94.959%

Laws of conservation of say we have 1.041g of fluorine in our HF. We know 1.041 is 94.959% of the mass of HF so do some simple math to find the remaining: 1.041/0.94959 = 1.096g

Answer:

Winds are a result of the tendency of warm air to rise and, conversely, cool air to sink. ... Because the atmosphere constantly flows, like a fluid in a container, air rushes into such low pressure areas from cooler, high-pressure ones, and the movement of the air creates wind.

Rate constant of reaction at 1200 K : 1.20 times 10 9 M -1 s -1

What is Rate of Reaction?

The rate of reaction in a chemical reaction is the speed at which the products are formed from the reactants. It helps us comprehend how rapidly a reaction might happen. For instance, cellulose burns exceedingly quickly in fire and the process is complete in less than a second.

The rate of reaction, also known as reaction rate, is the rate at which reactants transform into products. It should go without saying that different chemical reactions occur at different rates. While certain chemical reactions take place extremely immediately, others usually take some time to reach their final equilibrium.

Rate of reaction = k [NH 3] x [NO] y, where k is the reaction's rate constant, x is the order of the reaction with respect to NH 3, and y is the order of the reaction with respect to NO

Rate of reaction = k [NH 3 ] [ NO ]  

Rate constant of reaction at 1200 K : 1.20 times 10 9 M -1 s -1

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