what is the theoretical absorbance of a .01mm solutin pf tetraguaiacla at 500

Answer:

ethanol

Explanation:

CO2 is carbon dioxide

C2H5OH is ethanol and we know that because that is what is left after taking out the CO2

Your brain's stress-reduction mechanisms are activated when you smile. Neuropeptides are these chemicals that let neurons in your brain communicate with one another. Dopamine, endorphins, and serotonin are also released by smiling in the brain.

Why is smiling so essential?

Studies have shown that in addition to the endorphins that people release, smiling can also reduce stress, blood pressure, blood sugar, and blood sugar levels, strengthen immune systems, and release serotonin and natural painkillers. Attracts People to You - A smile frequently relaxes other people.

Your brain's stress-reduction mechanisms are activated when you smile. Neuropeptides are these chemicals that let neurons in your brain communicate with one another. Dopamine, endorphins, and serotonin are also released by smiling in the brain.

To learn more about smile from the given link.

https://brainly.com/question/29414798

#SPJ4

Answer:

When the higher energy metal molecules come in contact with the lower energy water molecules, energy is transferred to the water. The water molecules then move faster, and so are at a higher temperature.

Answer:

\(H_2CO_3\rightleftharpoons H_2O + CO_2\)

Explanation:

When carbon dioxide dissolves and reacts with water, the water and the gaseous  \($CO_2$\)   reacts to form a dilute mixture solution of \($H_2CO_3$\) (carbonic acid ).

The reaction is   \(H_2O + CO_2\rightleftharpoons H_2CO_3\)

This is a forward reaction.  And the symbol   \($ \rightleftharpoons $\)  shows that the reaction can be reversible. It means that the reaction can be carried in forward direction as well as in the backward direction.

The reaction attains chemical equilibrium until the reactants and the products no longer changes with time.  

The carbonic acid can also dissociates into carbon dioxide and water in the backward direction.

\(H_2CO_3\rightleftharpoons H_2O + CO_2\)

A)1.75×3 moles of carbon monoxide

B)2:3

A)each mole of ferric oxide requires 3 moles of carbon monoxide. Therefore 1.75 moles requires 1.75 ×3 moles of carbon monoxide

Answer:

Molarity of HCl = 1.6M

Explanation:

The chemical reaction equation is;

HCl(aq) + NaOH(aq) —> NaCl(aq) + H2O(l)

Now, molarity = number of moles/volume

Thus, for NaOH, we have;

Number of moles = molarity × volume = 2M × (20/1000) L

Number of moles = 0.04 moles

Using the coefficients in the chemical equation above, we can find the corresponding number of moles for HCl.

Number of moles of HCl = 0.04 moles NaOH × (1 mole of HCl/1 mole of HCl) = 0.04 moles of HCl

Thus;

Molarity of HCl = 0.04/(25/1000)

Molarity of HCl = 1.6M

Answer:

For atoms of elements in the same group (except the last 2 columns of group VIIIB), what is the relationship between the group number and the valence electron?

Answer:

E = 15×10⁻²⁹ J

Explanation:

Given data:

Frequency of photon = 2.2× 10⁷ Hz

Energy of photon = ?

Solution:

Formula:

E = h.f

h = 6.63×10⁻³⁴ Js

by putting values,

E = 6.63×10⁻³⁴ Js × 2.2× 10⁷ s⁻¹

E = 14.586 ×10⁻²⁹ J

E = 15×10⁻²⁹ J

The energy of photon is 15×10⁻²⁹ J.

The van der Waals "a" is greater for SO2 (g) than for He (g) because attractive forces between SO2 molecules are stronger than those between He atoms.

van der Waals forces are weak intermolecular forces that occur between molecules. The Van der Waals "a" is a parameter in the Van der Waals equation that represents the strength of these forces. It reflects the attractive forces between the molecules.

SO2 (g) and He (g) both experience Van der Waals forces, but the forces are stronger for SO2 (g) than for He (g). This is because SO2 is a larger, more polarizable molecule with a higher molecular weight and a more complex structure than He (g), which is a small, non-polar atom. As a result, the attractive forces between SO2 molecules are stronger than those between He atoms, leading to a greater value for the Van der Waals "a" parameter for SO2 (g) compared to He (g).

To learn more about van der Waals, visit:

https://brainly.com/question/11457190

#SPJ11

The force of gravity acting on the box is 1,500 N or 152.7 kg.

Force of gravity is the force that attracts two objects towards each other. The force of gravity acting on an object is directly proportional to its mass and inversely proportional to the square of the distance between the object and the center of the Earth.

The force of gravity can be calculated using the formula

Fg = mg,

where Fg is the force of gravity, m is the mass of the object, and g is the acceleration due to gravity,

which is approximately 9.81 m/s2 near the surface of the Earth.

If the box weighs 1,500 N, then the force of gravity acting on the box would be

Fg = mg

    = (1,500 N)/(9.81 m/s2)

    = 152.7 kg.

Therefore, the force of gravity acting on the box is 1,500 N or 152.7 kg.

The force of gravity is an important concept in physics, as it affects everything on Earth. The gravitational force between two objects depends on their masses and the distance between them. The more massive the objects are, the greater the force of gravity between them. Similarly, the closer two objects are, the greater the force of gravity between them.

The force of gravity is also responsible for keeping the planets in orbit around the Sun and the Moon in orbit around the Earth. It is a fundamental force of nature that plays a crucial role in our understanding of the universe.

Learn more about force of gravity from the given link

https://brainly.com/question/2537310

#SPJ11

changes in the Sun's magnetism produce a greater number of sunspots, more energy and cause solar eruptions of particles

Answer:

When you wash your hands with soap, it dislodges the dirt, grease, oils, and disease-ridden fecal matter particles on your hands by creating these micelles. Surrounded by the soap, the oil molecules become suspended and distributed in the water rather than stubbornly clinging to your skin.

Explanation:

The reaction between tin (II) oxalate and lithium chloride is that it forms tin (II) chloride and lithium oxalate, which are the products of the reaction. The balanced chemical equation for the reaction is  SnC₂O₄ + 2 LiCl → SnCl₂ + Li₂C₂O4.

Tin (II) oxalate reacts with lithium chloride to form a precipitate of tin (II) chloride and lithium oxalate. The reaction between tin (II) oxalate and lithium chloride is given below.

SnC₂O₄ + 2 LiCl → SnCl₂ + Li₂C₂O4

The balanced chemical equation for the reaction is as follows:

SnC₂O₄ + 2 LiCl → SnCl₂ + Li₂C₂O4 .

SnC₂O₄ is tin (II) oxalate, while LiCl is lithium chloride.

SnCl₂ is tin (II) chloride, while Li₂C₂O4 is lithium oxalate.The products of the reaction between tin (II) oxalate and lithium chloride are tin (II) chloride and lithium oxalate. Tin (II) chloride is a white crystalline powder that is soluble in water, whereas lithium oxalate is a white solid that is insoluble in water.The reaction between tin (II) oxalate and lithium chloride is a double displacement reaction, which is also known as a metathesis reaction. When a double displacement reaction takes place, two compounds exchange their cations and anions, resulting in the formation of two new compounds.

The reaction is a double displacement reaction or metathesis reaction where two compounds exchange their cations and anions to form two new compounds.

To know more about  double displacement reaction visit:

brainly.com/question/29740109

#SPJ11

Answer:

Electrons are trapped inside the atom because of the attraction forces with positively charged protons that are found in the nucleus.

The description of nonpoint source pollution is dirty drainage from city roadways.

The correct option is A.

Pollution describes the presence of substances in the environment that are harmful to the living organisms present in that environment.

Pollution may be classified based on the source of the pollution into:

Learn more about nonpoint source pollution at: https://brainly.com/question/1557306

#SPJ1

Answer:

C. New ocean crust forms.

Explanation:

At divergent margins, it is true that new ocean crusts forms at the margins.

Along a divergent margin, two lithospheric plates are moving apart from one another.

Usually, when this occurs between two oceanic plates, the underlying mantle upwells to fill the void. The cooling and solidifying mantlic materials furnishes the formation of a new crust.

This is the oceanic crust.

The classification of the given elements is as follows:

Metals: Mg (Magnesium), Hg (Mercury)

Non-metals: C (Carbon), S (Sulfur)

Metalloids: Si (Silicon), As (Arsenic

Elements can be classified into three main categories: metals, non-metals, and metalloids.

Metals are typically shiny, conductive, and malleable, while non-metals are generally dull, non-conductive, and brittle.

Metalloids exhibit properties that are intermediate between metals and non-metals.

Let's classify the given elements based on these characteristics.

C (Carbon) - Non-metal: Carbon is a non-metal. It is a non-conductive element that can exist in various forms, including graphite and diamond.

Mg (Magnesium) - Metal: Magnesium is a metal. It is a shiny, silver-white element that is a good conductor of electricity and heat. It is also malleable and ductile.

Si (Silicon) - Metalloid: Silicon is a metalloid. It exhibits properties of both metals and non-metals. It is a semi-conductor, which means it can conduct electricity under certain conditions but not as effectively as metals.

S (Sulfur) - Non-metal: Sulfur is a non-metal. It is a yellow, brittle element that is a poor conductor of electricity and heat.

Hg (Mercury) - Metal: Mercury is a metal. It is the only metal that is liquid at room temperature. It is a good conductor of electricity and has a shiny appearance.

As (Arsenic) - Metalloid: Arsenic is a metalloid. It has properties that are intermediate between metals and non-metals. It can conduct electricity under certain conditions but is not as effective as metals.

In conclusion, the classification of the given elements is as follows:

Metals: Mg (Magnesium), Hg (Mercury)

Non-metals: C (Carbon), S (Sulfur)

Metalloids: Si (Silicon), As (Arsenic)

To know more about  elements visit:

https://brainly.com/question/28851779

#SPJ11

Answer:

Explanation:

Vinegar contains acetic acid, and baking soda is sodium hydrogen carbonate. When they are combined, a reaction occurs and bubbles form. Which gas is in the bubbles, and why do the bubbles form? Oxygen gas forms because an acid reacts with a metal.

( if you want to copy and paste make sure to rephrase it)

Answer:

Two non bonded electron pairs and four bonded electron pairs

Explanation:

An image of the compound as obtained from chemlibretext is attached to this answer.

The ion ICl4- ion, is an AX4E2 ion. This implies that there are four bond pairs and two lone pairs of electrons. As expected, the shape of the ion is square planar since the lone pairs are found above and below the plane of the square. This is clear from the image attached.

The central iodine atom in the ICl4- ion has two (2) nonbonded electron pairs and four (4) bonded electron pairs in its valence shell.

In conclusion, the central iodine atom in the ICl4- ion has two (2) nonbonded electron pairs and four (4) bonded electron pairs in its valence shell.

Learn more in:

https://brainly.com/question/7223122

Chapter One of the book "The Disappearing Spoon" by Sam Kean is titled "Ruthenium, Rhodium, and Palladium." This chapter explores the fascinating history, properties, and uses of these three elements from the periodic table.

The chapter begins with the story of a chemical spill in the town of Norilsk, Russia, which is home to the world's largest nickel mine. The spill caused massive environmental damage and raised concerns about the toxic effects of metals.

This incident sets the stage for the exploration of elements that possess unique properties and have played significant roles in scientific and industrial advancements.

The author then introduces the readers to the periodic table and its significance in understanding the behavior and characteristics of elements. He explains the arrangement of elements and how they are grouped based on their chemical properties.

Moving on, Kean delves into the history and properties of ruthenium, rhodium, and palladium. He shares interesting anecdotes about their discoveries, including the challenges faced by scientists in isolating and identifying these elements. The author highlights the rarity and value of these metals and their importance in various fields, such as catalysis, electronics, and jewelry making.

Furthermore, Kean discusses the cultural and societal impact of these elements, including their use in the automotive industry, where palladium plays a crucial role in catalytic converters. He also explores the darker side of these elements, such as their involvement in illegal activities, including theft and smuggling.

Overall, Chapter One of "The Disappearing Spoon" provides an engaging introduction to the world of elements and sets the stage for further exploration of the periodic table and its fascinating stories.

For more such question on Palladium visit;

https://brainly.com/question/28603477

#SPJ8

Niels Bohr is known for developing the planetary model of atom. Therefore, option (A) is correct.

In the planetary model, the electrons of an atom orbit around the nucleus like the planet orbits around the sun. The Bohr model proposed by Neils Bohr is similar to the planetary motion. Therefore, this model is also known as the planetary model of the atom.

In this model, the negatively charged electrons orbit around the positively charged nucleus which is present in the center of an atom. Similar to the gravitational force between the sun and the planets, there is a coulomb force of attraction between the electrons and the nucleus.

The orbits in which electrons revolve are named Principal quantum number n. The energy levels of an atom having principal quantum numbers n = 1, 2, 3, 4....... are assigned to the shells K, L, M,........ respectively.

Therefore, the planetary model of the atom was proposed by Neils Bohr by modifying the Rutherford model.

Learn more about the planetary model, here:

https://brainly.com/question/10114170

#SPJ6

Expressing this answer in scientific notation, the amount of N2 produced according to the engineer's design would be approximately 1.467 x 10^1 mol.

To determine the amount of N2 produced in the reaction between dinitrogen tetroxide (N2O4) and excess hydrazine (N2H4), we need to consider the stoichiometry of the reaction.

The balanced equation for the reaction is:

N2H4 + N2O4 → N2 + 2H2O

According to the stoichiometry of the reaction, for every one mole of N2H4, one mole of N2 is produced. The molar mass of N2H4 is approximately 32.05 g/mol.

Given that the rocket is designed to hold 1.35 kg (1350 g) of N2O4, we can calculate the moles of N2H4 required:

Moles of N2H4 = Mass of N2O4 / Molar mass of N2O4

Moles of N2H4 = 1350 g / 92.01 g/mol ≈ 14.67 mol

Since the stoichiometry is 1:1, the amount of N2 produced will be equal to the moles of N2H4:

Moles of N2 produced = Moles of N2H4 ≈ 14.67 mol

Expressing this answer in scientific notation, the amount of N2 produced according to the engineer's design would be approximately 1.467 x 10^1 mol.

For more question on  scientific notation

https://brainly.com/question/30406782

#SPJ8

The element with 38 protons, 36 electrons, and 40 neutrons is Strontium (Sr).

Strontium (Sr) is the element with 38 protons, 36 electrons, and 40 neutrons. It belongs to the alkaline earth metal group on the periodic table. The atomic number of an element corresponds to the number of protons in its nucleus, so in this case, the atomic number is 38. Since atoms are electrically neutral, the number of electrons in an atom is also equal to the number of protons. Therefore, there are 36 electrons surrounding the nucleus of the strontium atom.

The total number of protons and neutrons in an atom is known as the mass number. In this case, the mass number is 38 (protons) + 40 (neutrons) = 78. Strontium has various isotopes, which are atoms with the same number of protons but different numbers of neutrons. The most common isotope of strontium, with a mass number of 88, has 50 neutrons. However, the specific isotope mentioned in the question has a mass number of 78 and 40 neutrons.

Strontium is a soft, silvery-white metallic element that is highly reactive with water and air. It is commonly used in pyrotechnics to produce red-colored flames. Strontium compounds are also utilized in the manufacturing of ceramics, glass, and fireworks. Its radioactive isotope, strontium-90, has been used in medical imaging and cancer treatments.

Learn more about Strontium

brainly.com/question/27791646

#SPJ11

Answer:

11.5 okkkkkkkkkkkkkkkkkkkkkkkkkkkk chutita

Answer:

true?

Explanation: