EXPLAIN Describe the patterns you see among the chemical formulas. How


does the placement of the elements on the periodic table appear to relate to the


numbers in the chemical formula?


PLEASE HELP ME

The same fertilizer should be applied to all types of soil, which is false as different soils have different nutrient compositions and physical properties and therefore require different fertilizers to support plant growth.

Sandy soils tend to be low in nutrients and require fertilizers with high nitrogen content, while clay soils retain more nutrients and may require fertilizers with less nitrogen and more phosphorus and potassium. Additionally, different plants have different nutrient requirements, so the type of fertilizer needed will also depend on the crop being grown. Therefore, it is important to test the soil and determine its nutrient needs before applying any fertilizer to ensure the best possible growth and yields.

Hence, the same fertilizer should be applied to all types of soil, which is false as different soils have different nutrient compositions and physical properties and therefore require different fertilizers to support plant growth.

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Answer:

Option B. A

Explanation:

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

C(s) + 2H₂ (g) —> CH₄ (g). ΔH = –74.9 kJ

From the reaction above, we can see that the enthalpy change (ΔH) is negative (i.e –74.9 KJ) which implies that the heat content of the reactants is greater than the heat content of the products. Thus, the reaction is exothermic reaction.

For an exothermic reaction, the energy profile diagram is drawn in such a way that the heat content of reactants is higher than the heat content of products because the enthalpy change

(ΔH) is always negative.

Thus, diagram A (i.e option B) gives the correct answer to the question.

Answer:

B. A

Explanation:

Graph A, I just took a quiz on  a p e x  and it was correct!:)

Answer:

C

Explanation

the most important factor is the angle that the sunlight hits the earths surface

Answer:

Reforestation can be used to undo and rectify the effects of deforestation and improve the quality of human life by absorbing pollution and dust from the air, rebuilding natural habitats and ecosystems,reducing global warming via biosequestration of atmospheric carbon dioxide, and harvesting for resources, particularly.

Explanation:

Answer:

19) 3.6920 × 10⁻⁵

20) 4.059× 10²

21) 2.46810121416 × 10³

22)  1.0000× 10⁻³

Explanation:

Scientific notation is the way to express the large value in short form.

The number in scientific notation have two parts.

The digits (decimal point will place after first digit)

× 10 ( the power which put the decimal point where it should be)

For example:

0.000036920

In scientific notation =  3.6920 × 10⁻⁵

405.9

In scientific notation  = 4.059× 10²

2468.10121416

In scientific notation  = 2.46810121416 × 10³

0.0010000

In scientific notation  = 1.0000× 10⁻³

The dipole-dipole forces between CCl₄ molecules are greater than those between CH₄ molecules.

The observation that CCl₄ (carbon tetrachloride) deviates more from ideal gas behavior than CH₄ (methane) suggests that there are stronger intermolecular forces present in CCl₄. This deviation from ideal gas behavior can be attributed to the presence of dipole-dipole forces between CCl₄ molecules.

CCl₄ is a polar molecule due to the electronegativity difference between carbon and chlorine atoms. The partial positive charge on carbon and the partial negative charges on chlorine atoms result in dipole-dipole interactions between CCl₄ molecules. These dipole-dipole forces are stronger than the London dispersion forces present in CH₄.

In contrast, CH₄ is a nonpolar molecule, and its intermolecular forces are dominated by London dispersion forces, which arise from temporary fluctuations in electron distribution. London dispersion forces are generally weaker than dipole-dipole forces.

Therefore, the statement that best explains the observation is that the dipole-dipole forces between CCl₄ molecules are greater than those between CH₄ molecules, leading to a larger deviation from ideal gas behavior in CCl₄.

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those r deep questions.. it all depends on if ur religious and if so wht that religion is

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Four quantum numbers are necessary to designate a particular electron in an atom.

In physics and chemistry, quantum numbers refer to a particular series of numbers that is used to indicate the position of an electron in an atom.

Not only the position they also tell about the energy of an electron.

Four quantum numbers are characterized as principal, angular momentum, spin, and magnetic quantum numbers.

Alphabetically, they are represented as n, l, m, and s.

In general, these quantum numbers, refer to the shape, size, and orientation of an orbital in space. It also gave the idea about the maximum number of chances of the presence of an electron in three-dimensional space.

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The equation that relates surface tension (y) to the radius of a bubble (r) is known as Laplace's law, given by:

y = (2∆P × r) ÷ ∆r

where ∆P is the pressure difference across the bubble's surface, and ∆r is the change in the radius of the bubble due to the introduction of additional gas into the bubble.

The surface tension of liquids can be measured by using a tensiometer. One common type of tensiometer is the Wilhelmy plate method, which involves suspending a thin plate (usually made of platinum or glass) from a balance and immersing it in the liquid.

The force required to detach the plate from the liquid surface is measured, and from this, the surface tension of the liquid can be calculated. Another method is the pendant drop method, which involves suspending a droplet of liquid from a needle and measuring its shape using a camera. The shape of the droplet can be used to determine the surface tension of the liquid.

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The correct question is:

What equation relates surface tension y to the radius of a bubble?

By what method will the surface tension of liquids be measured in this experiment?

The right molecular orientation and sufficient energy to overcome Ea are necessary for one collision amongst reaction to be successful.

The vehicular accident, human crash, and internal collision are the three steps that every collision goes through, which you may not have known.

Regardless of who was at fault, coverage provides compensation to fix or replace your automobile if it is damaged or damaged in a collision with another vehicle. That's not the same as liability insurance, which assists in covering damage to that other user's vehicle as a result of a collision you caused.

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Based on the given value of 3.0x10^12 hydronium ions, we can predict that the solution is acidic.

The concentration of hydronium ions (H3O+) is a measure of the acidity of a solution. A neutral solution has a concentration of H3O+ ions of 1.0 x 10^-7 moles per liter. An acidic solution has a higher concentration of H3O+ ions than a neutral solution, while a basic solution has a lower concentration. In this case, the concentration of H3O+ ions is 3.0x10^12, which is much higher than the concentration of a neutral solution. Therefore, we can conclude that the solution is acidic.

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the wavelength of an electromagnetic wave is 4. 257 x 10-9 m, and its frequency is 0.7047 * 10¹⁷ s⁻¹

λ=4.257nm=4.257x 10^-9 m       [∵1nm=10⁻⁹m]

c=3×10⁸ m/sec

c=vλ

\(v=\frac{c}{λ}\)  

=3*10⁸/4.257x 10⁻⁹

=0.7047 * 10¹⁷ s⁻¹

Physically speaking, electromagnetic radiation (EMR) is made up of electromagnetic (EM) field waves that travel through space carrying electromagnetic radiant energy. It consists of microwaves, X-rays, gamma rays, infrared, visible light, and other electromagnetic waves. A spectrum of electromagnetic wave includes each of these waves.

Traditional electromagnetic radiation is made up of electromagnetic waves, which are coordinated oscillations of the electric and magnetic fields. A periodic shift in the electric or magnetic field is what causes electromagnetic radiation or waves to be produced. Different electromagnetic spectrum wavelengths are created depending on the power generated and how this periodic shift happens. Electromagnetic waves move at the speed of light in a vacuum, typically abbreviated as c. The two fields oscillate in a manner that is perpendicular to one another in homogeneous, isotropic media.

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Answer:

The noble gas notation for zinc would be [Ar]3d^104s^2

Explanation:

I hope this helps you:) let me know if it does make sense, okay?

The distribution of electrons in carbon and sodium atoms is 1s²2s²2p² and 1s²2s²2p⁶3s¹ respectively.

1s²2s²2p² is the distribution of electrons in carbon and 1s²2s²2p⁶3s¹ is the distribution of electrons in sodium.

The atomic number of Carbon is 6 and sodium is 11.

This indicates the presence of two electrons in the innermost orbital of carbon, further the next electrons are in the 2s orbital and next two electrons are in the orbital 2p in the carbon atom. So, we can write, the distribution of electrons is 1s²2s²2p².

However, In sodium atom, this indicates the presence of two electrons in the innermost orbital of carbon, further the next electrons are in the 2s orbital and next six electrons are in the orbital 2p and further one electron in the 3s orbital. So, we can write, the distribution of electrons is 1s²2s²2p⁶3s¹

The Electronic configuration is the distribution of electrons in the atom containing orbitals according to a basic principle.

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magnets attract everything with metal inside of it

Answer: magnets attract everything with metal inside of it

Explanation:

The first observation, whether the bulb turns on, is a simple yes or no answer that can indicate whether the material being tested is a conductor or an insulator. If the bulb turns on, it means that the material is a conductor and allows electricity to flow through it. If the bulb does not turn on, it means that the material is an insulator and does not allow electricity to flow through it.

The second observation, the brightness of the light bulb when it turns on, can indicate the strength of the conductivity. If the bulb turns on but is dim, it could mean that the material being tested is a weak conductor. If the bulb turns on brightly, it could indicate that the material is a strong conductor.

The third observation, how long the bulb took to light up, can give an idea of the conductivity speed of the material being tested. If the bulb turns on quickly, it means that the material is a fast conductor. If the bulb takes longer to turn on, it could indicate that the material is a slow conductor.

Overall, all of these observations could be useful in determining the conductivity of a material and understanding its properties.

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0.440 L of nitrogen trichloride will be produced after 10 minutes.

The reaction between nitrogen gas and chlorine gas to produce nitrogen trichloride is:

N2 (g) + 3Cl2 (g) → 2NCl3 (g)

To determine the amount of nitrogen trichloride produced, we need to calculate the limiting reactant first. The mole ratio between N2 and Cl2 is 1:3, which means that every mole of N2 requires 3 moles of Cl2 to react completely.

Using the ideal gas law, we can calculate the number of moles of each gas present in the flask:

n(N2) = PV/RT = (0.666 atm) x (2 L) / (0.0821 L·atm/K·mol) x (400 K) = 0.040 mol

n(Cl2) = PV/RT = (0.333 atm) x (2 L) / (0.0821 L·atm/K·mol) x (400 K) = 0.020 mol

Since N2 and Cl2 are in a 1:2 ratio, we can see that Cl2 is the limiting reactant. Therefore, all of the Cl2 will be consumed in the reaction, and the amount of N2 consumed will be 0.010 mol (which is 0.020 mol Cl2 / 2). From the balanced chemical equation, we can see that every 3 moles of Cl2 react with 1 mole of N2 to produce 2 moles of NCl3. Therefore, the amount of NCl3 produced will be:

n(NCl3) = 2/3 x n(Cl2) = 2/3 x 0.020 mol = 0.0133 mol

Finally, we can use the ideal gas law again to calculate the volume of NCl3 produced at the same temperature and pressure as the initial gases:

V(NCl3) = n(NCl3)RT/P = (0.0133 mol) x (0.0821 L·atm/K·mol) x (400 K) / (1 atm) = 0.440 L

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Answer:

If it has to do with heat, it's thermal. ... The Greek word therme, meaning “heat,” is the origin of the adjective thermal. Something that is thermal is hot, retains heat, or has a warming effect.

Explanation:

hope it helps :)

This problem is giving information about a nylon polymer whose molar mass is 15,000 amu (atomic mass units).

The first subject of matter here, is to recall the monomeric molecular formula of nylon which is C₁₂H₂₂N₂O₂, and the definition of monomer (basic molecule able to react and form a polymer) and polymer (assembling of monomers).

Next, we calculate the molar mass of the monomer of nylon:

\(12*12.01+22*1.01+2*14.01+2*16.00=226.31amu\)

Finally, the number of units is calculated by dividing the molar mass of the polymer and the monomers:

\(n=\frac{15000}{226.31} =66.2\)

Which is about 66 monomers.

Learn more:

Answer:

66 monomers

Explanation:

Answer:

Density of irregular object = 1.62 g/mL

Explanation:

Density of a substance = mass of substance /volume of substance

Mass of substance as measured from the scale = 19.37 g

Volume of the object spins determined bynthe displacement method since itnis an irregular object. In this method, the object whose volume is required is immersed in a measuring cylinder containing a known volume of water. The new volume of water after the immersion of the object is recorded. The volume of the irregular object is then obtained by finding the difference between the final and initial volume of water. This is so because a solid immersed in a liquid will displace its own volume of the liquid.

Volume of irregular object = 61.94 mL - 50.0 mL = 11.94 mL

Density of irregular object = 19.37 g / 11.94 mL

Density of irregular object = 1.62 g/mL

Answer: 63.55

Explanation:

The attached chart shows the calculation.  The orange line points to the % abundance of Cu-65, which is the difference of 100% less the % Abundance of Cu-65 (since there are only 2 isotopes).

The weighted average contribution of each istope is calculated (blue arrow) and then summed to find the atomic mass of copper.

Synthetic and natural medications are not fundamentally dissimilar at the atomic level. Chemical compounds made up of atoms and molecules make up both sorts of pharmaceuticals.

At the atomic level, natural medicines found in the rain forest and synthetic medications are identical. After all, whether they are created in a lab or the natural world, they are still just molecules.

Designer drugs, club drugs, and other names for synthetic pharmaceuticals replicate or enhance the effects of natural narcotics. Contrary to those natural drugs, however, synthetic narcotics such as K2, MDMA, or bath salts are all generated from man-made chemicals and are typically produced in a laboratory environment.

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Get ready, you should catch it.

Answer:

As an object falls, its gravitational potential energy decreases as its speed—and therefore its kinetic energy—increases.

Explanation:

Study Island

Answer:

Na2CrO4 + AgNO3

Al2(SO4)3 + Ba(NO3)2

BaCl2 + K2CrO4

Explanation:

Explanation:

K+ ion has 18 electrons and Argon also has 18 electrons so they do have the same electronic structure.

However, Al3+ ion has 10 electrons and Argon has 18 electrons, so they do not have the same electronic structure.

B) Glycerol is not found in nucleic acids. Glycerol is a three-carbon alcohol that is a component of triglycerides, which are the main constituents of fats and oils.

Nucleic acids, such as DNA and RNA, are composed of nucleotide subunits. Nucleotides consist of three components: a phosphate group, a five-carbon sugar molecule (deoxyribose in DNA or ribose in RNA), and a nitrogenous base. In DNA, the nitrogenous bases include adenine (A), guanine (G), cytosine (C), and thymine (T). In RNA, thymine is replaced by uracil (U). Glycerol, on the other hand, is a three-carbon alcohol and is not a component of nucleotides or nucleic acids. It is primarily involved in the structure of lipids, serving as a backbone for triglycerides and phospholipids.

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Answer:

H - Cl2 +NaBr -> Br2+2NaCl

Answer:

A wind turbine transforms the mechanical energy of wind into electrical energy. A turbine takes the kinetic energy of a moving fluid, air in this case, and converts it to a rotary motion.

hope it helps (^^)

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