please help if you can. thank you.​

739.20 g of oxygen gas would be needed to react completely with 9.76 moles of iron according to the equation Fe + O2 --> Fe2O3. This can be determined by using the mole ratio from the balanced equation.

Iron is a chemical element with the symbol Fe and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is by mass the most common element on Earth, forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust.

The ratio of iron to oxygen is 1:2, so for every 1 mole of iron, 2 moles of oxygen is needed. Since 9.76 moles of iron is given, 9.76 x 2 = 19.52 moles of oxygen is needed. To convert moles of oxygen to grams, 19.52 moles of oxygen gas is multiplied by the molar mass of oxygen, which is 16.00 g/mol. 19.52 moles x 16.00 g/mol = 312.32 g. Since the equation calls for 2 moles of oxygen, 312.32 g is multiplied by 2, giving a total of 739.20 g of oxygen gas.

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Answer:

+2

Explanation:

Protons are positive and electrons are negative, this ion has more positive charges than negative charges therefore the overall charge of the ion is +2.

+26 + -24 = +2

If an ion has 26 protons and 24 electrons, the charge of the ion will be +2.

HOW TO DETERMINE CHARGE OF AN ION:

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Answer:

Chemistry has a reputation for being a complicated and boring science, but for the most part, that reputation is undeserved. Fireworks and explosions are based on chemistry, so it's definitely not a boring science. If you take classes in chemistry, you'll apply math and logic, which can make studying chemistry a challenge if you are weak in those areas. However, anyone can understand the basics of how things work, and that's the study of chemistry. In a nutshell, the importance of chemistry is that it explains the world around you.

Chemistry Explained

Cooking: Chemistry explains how food changes as you cook it, how it rots, how to preserve food, how your body uses the food you eat, and how ingredients interact to make food.

Cleaning: Part of the importance of chemistry is it explains how cleaning works. You use chemistry to help decide what cleaner is best for dishes, laundry, yourself, and your home. You use chemistry when you use bleaches and disinfectants, even ordinary soap and water. How do they work? That's chemistry.

Medicine: You need to understand basic chemistry so you can understand how vitamins, supplements, and drugs can help or harm you. Part of the importance of chemistry lies in developing and testing new medical treatments and medicines.

Environmental Issues: Chemistry is at the heart of environmental issues. What makes one chemical a nutrient and another chemical a pollutant? How can you clean up the environment? What processes can produce the things you need without harming the environment?

We humans are all chemists. We use chemicals every day and perform chemical reactions without thinking much about them. Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything.

Importance of Taking Chemistry

Everyone can and should understand basic chemistry, but it may be important for you to take a course in chemistry or even make a career out of it. It's important to understand chemistry if you are studying any of the sciences because all of the sciences involve matter and the interactions between types of matter.

Students wanting to become doctors, nurses, physicists, nutritionists, geologists, pharmacists, and (of course) chemists all study chemistry. You might want to make a career out of chemistry because chemistry-related jobs are plentiful and high-paying. The importance of chemistry won't be diminished over time, so it will remain a promising career path.

Paragraph 1:

Chemistry is important Because it is so fundamental to our world, chemistry plays a role in everyone's lives and touches almost every aspect of our existence in some way.

Paragraph 2:

Chemistry is essential for meeting our basic needs of food, clothing, shelter, health, energy, and clean air, water, and soil.

Paragraph 3:

Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything.

Paragraph 4:

Chemistry has a reputation for being a complicated and boring science, but for the most part, that reputation is undeserved.

Paragraph 5:

Fireworks and explosions are based on chemistry, so it's definitely not a boring science. If you take classes in chemistry, you'll apply math and logic, which can make studying chemistry a challenge if you are weak in those areas.

Hope it helps :))

Answer:

The nucleus is responsible for storage as well as the transfer of genetic materials in the form of DNA or RNA.  It aids in the process of transcription by the synthesis of mRNA molecules and the nucleus controls the activity of all other organelles while facilitating processes like cell growth, cell division and synthesis of proteins.

Explanation:

The nucleus is a double membrane-bound structure responsible for controlling all cellular activities as well as a center for genetic materials, and it’s transferring.

Answer:

It is the nucelus

Explanation:

the nucleus is the control center of the cell

During the cell cycle, compounds called cyclins increase and decrease in a regular pattern. They regulate the stages of cell division and growth.

Cell cycle development is regulated in element by way of the sequential pastime of various cyclins. The cyclins are regulatory subunits that bind, prompt and provide substrate specificity for their catalytic companion serine-threonine kinases, collectively called cyclin-established kinases.

Cyclins are a family of proteins that don't have any enzymatic interest of their personal however spark off CDKs through binding to them.

S cyclins are involved inside the induction of DNA replication and early stages of mitosis. Their stages upward push at the beginning of S phase and fall in early mitosis.

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Arrow A: Force of gravity

Arrow B: Moon's motion without gravity

Arrow C: Actual orbit

Gravity is a natural phenomenon that describes the attraction between objects with mass or energy. It is one of the four fundamental forces of nature, along with the strong nuclear force, the weak nuclear force, and the electromagnetic force.

Gravity is the force that pulls objects towards each other, and its strength depends on the masses of the objects and the distance between them. The more massive an object, the stronger its gravitational pull. The farther apart two objects are, the weaker their gravitational attraction.

Gravity is responsible for many important phenomena in the universe, such as the motion of planets and stars, the tides on Earth, and the bending of light by massive objects. The force of gravity also plays a crucial role in the formation and evolution of galaxies, black holes, and other celestial objects.

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Answer:

Fluorine is most likely to bond with lithium One lithium (Li) atom can combine with one fluorine (F) atom. Together, they make the formula LiF. Fluorine has seven electrons of it's own. Lithium gives up its one electron to make both atoms happy.

Answer:

Fluorine is most likely to bond with lithium One lithium (Li) atom can combine with one fluorine (F) atom. Together, they make the formula LiF. Fluorine has seven electrons of it's own. Lithium gives up its one electron to make both atoms happy.

Answer:

The Eukaryotic cell that the organelle shows below belongs to the Nucleus.

Explanation:

In fact, the mere presence of a nucleus is considered one of the defining features of a Eukaryota cell.

Answer:

\(MgO _{(s)} + 2H {}^{ + } _{(aq)} = Mg {}^{2 + } _{(aq)}+ H _{2} O _{(l)} \\ \)

The Ka of The pH of the resulting solution is 2.76 when 0.325 mol of the weak acid hx is dissolved in 2.00 l of water solution is 2.76 x \(10^{-3}\)

The Ka of the weak acid HX can be calculated using the following equation: Ka = [H+]2 / [HX]. Since the pH of the resultant solution is 2.76, [H+] = 10-2.76 = 0.00712. We can also calculate [HX] using the concentration of the initial acid, which was 0.325 mol.

Since the volume of the solution is 2.00 L, [HX] = 0.325 mol / 2.00 L = 0.1625 M. Substituting these values into the Ka equation gives us Ka = 0.007122 / 0.1625, which equals  2.76 x \(10^{-3}\)

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Answer: How do contrasting colors affect the quality of a painting

Answer:

The answer is D.

Explanation:

I just took the test. :)

Answer: The SI unit for force is Newtons (N).

Amontons's law, Charles's law, Boyle's law and Avogadro's law are applied in ideal gas equation.

According to Boyle's Law, gas volume grows as pressure lowers. According to Charles' Law, a gas expands in volume as its temperature rises. Additionally, Avogadro's Law states that as gas concentration rises, so does its volume. The macroscopic characteristics of ideal gases are related by the ideal gas law (PV = nRT). A gas is considered to be ideal if its particles neither attract nor repel one another and occupy any space (have no volume).

Hence, ideal gas equation summation of individual gas laws.

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If 3.7 grams of cl2 are used, HCl produced from the reaction is 7.4 grams.

A balanced chemical reaction formed when the number of the atoms involved in the reactants side is same to the number of atoms in the products side.

The balanced chemical equation is

H₂ + Cl₂ ⇒ 2HCl

From the balanced equation above,

1 gram of Cl₂ reacted to produce 2 gram of HCl

To determine the grams of HCl produced

From the balanced equation above,

1 gram of Cl₂ reacted to produce 2 gram of HCl

Therefore,

3.7 gram of Cl₂ will react to produce

= 3.7 × 2

= 7.4 grams of HCl

Thus, if 3.7 grams of cl2 are used, HCl produced from the reaction is 7.4 grams.

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The correct diagram is C as it is the correct electronic configuration for Sodium ion

What is electronic configuration ?

The description of the positions of the electrons around a nucleus is called an electron configuration. As we previously discovered, every neutral atom contains an equal number of protons and electrons. Now, we'll arrange those electrons such that they stand around the nucleus in a way that shows their energy and the nature of the orbital in which they are housed.

Na ( Sodium )

Atomic Number - 11

Electronic Configuration : 2,8,1

Na+ ( Sodium ion)

Electronic Configuration : 2,8

The correct diagram is C as it is the correct electronic configuration for Sodium ion

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Answer:

The number of protons in one atom of an element determines the atom's identity, and the number of electrons determines its electrical charge. The atomic number tells you the number of protons in one atom of an element.

Answer:

2.5 mol

Explanation:

The final pressure would be 7905.6 torr when the volume is changed to 1.03 L.

Boyle's law states that

At a steady temperature, the item of weight and volume of a gas is steady.

which implies

P1V1 = P2V2

where

P1 = starting weight

V1 = starting volume

P2 = ultimate weight

V2 = ultimate  volume

Substituting the given values into equation (1), we get:

P1 = 4.62 atm

V1 = 2.33 L

V2 = 1.03 L

Rearranging the equation (1)

P2 = P1V1/V2 = (4.62 atm x 2.33 L)/1.03 L = 10.41 atm

To convert atm to torr, ready to utilize the conversion factor:

As we know that 1 atm = 760 torr

so that, the ultimate weight in torr would be:

P2 = 10.41 atm x 760 torr/atm = 7905.6 torr

P2 = 7905.6 torr

Hence, the ultimate weight would be 7905.6 torr when the volume is changed to 1.03 L. 

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At atmospheric pressure and 120 K, Xe is a liquid, whereas Ar is a gas at the same circumstances.

The right response is B.

Intermolecular forces can be divided into three categories: hydrogen bonds, dipole-dipole interactions, and London dispersion forces (LDF). Despite the fact that molecules can have any combination of these three types of intermolecular forces, all substances at least contain LDF.

These are the four principal intermolecular forces: Van der Waals dipole-dipole interactions > Ionic bonds > Hydrogen bonds > forces of Van der Waals dispersion.

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Answer:

Explanation:

Answer: D

STRONG ACIDS:

HBr

HCl

HI

HNO3

HClO4

H2SO4

Answer:

1. 104000m

2. 160mm

3. 5600000 mg

Answer:

122 gm

Explanation:

54 days is 2 half lives :    ( 27 * 2 = 54)

  1/2   * 1/2 = 1/4 will be left

      1/4 * 488 = 122 gm

Answer: You can increase the weight, then test the speed, and make the weight normal and test the speed, and mark which one travels faster.

Explanation: This would test your hypothesis by comparing the speeds of the cars when more mass is added. Calculating the difference of the speed with more mass, and the speed with normal mass would give you your answer. A positive number would prove your hypothesis and a negative number would disprove it.

Answer:

pH>7

sour taste

donate H+ ions

turn litmus paper from blue to red

Explanation:

Answer:

Explanation:

   pH < 7.

   Sour taste (though you should never use this characteristic to identify an acid in the lab)

   Reacts with a metal to form hydrogen gas.

   Increases the H+ concentration in water.

   Donates H+ ions.

   Turns blue litmus indicator red.

At rest, K+ concentrations are higher inside neurons. K+ has the propensity to migrate out of the neuron down the concentration gradient because it can freely pass the neuronal membrane.

The inside of the cell contains more potassium ions than the outside does. The system as a whole is electrically neutral because an anion balances out each potassium ion (on either side of the membrane). As a result, there is a high concentration of sodium ions outside the cell and a high concentration of potassium ions inside. Additionally, the neuronal membrane contains specialized proteins known as channels that create gaps in the membrane that are only permeable to certain ions.

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Answer:

Hi

Explanation:

How has your brainly experience been so far? Are you liking?

Answer:

Thx you are sooo noice

Explanation:

UwU U3U

Answer:

depends...

on how difficult it is

Answer:

mutual relationship

Explanation:

pls mark brainliest

The pillar of sustainability broken by recycling electronics in India is environmental sustainability. Implementing a law that restricts electronics recycling to the US would not necessarily be the most effective solution, as it overlooks the complex global dynamics of electronic waste management.

Recycling electronics in India often involves improper disposal methods, such as burning or dismantling without proper safety measures. This leads to environmental pollution, including the release of hazardous substances into the air, soil, and water, thus violating the principle of environmental sustainability.

However, simply mandating that electronics can only be recycled in the US may not be the most optimal solution. Electronic waste is a global issue, and restricting recycling to a single country disregards the fact that electronic products are manufactured and consumed worldwide. A more comprehensive approach to addressing electronic waste would involve international cooperation, strict regulations, and monitoring of recycling practices to ensure they meet environmental standards.

Efforts should focus on improving recycling practices globally, including promoting responsible electronic waste management, developing sustainable recycling infrastructure in multiple countries, and encouraging the adoption of safe and environmentally friendly recycling practices. This approach would foster global sustainability and address the challenges associated with electronic waste disposal more effectively than a geographically limited restriction.

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