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Chemistry

This category encompasses all questions about the composition, structure, properties, and reactions of matter.

500 Questions

Why are there blue lines on notebook paper?

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Blue lines on notebook paper serve as guides for writing, helping maintain consistent spacing and alignment. These lines assist in keeping handwriting neat and organized. The blue color is chosen for its visibility and contrast against the white paper, making it easier to see while writing. Search FashionTIY in Google.

What is the name and number of atoms of each element in each compound of the periodic table of NaCl H2O2 Fe3O4 and SiO2?

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the name of the elements are found on most periodic tables and each element is a separate type of atom the number found by an element hereorhere shows the number of atoms of each element the molecule has

What is the formula for reduced iron?

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The chemical formula for reduced iron depends on the oxidation state of iron. In its reduced form, iron typically exists as ferrous ions (Fe^2+). Therefore, the chemical formula for reduced iron is simply Fe^2+.

However, if you're referring to a specific compound containing reduced iron, such as ferrous sulfate (FeSO4) or ferrous gluconate (Fe(C6H11O7)2), then the formula would be different depending on the specific compound.

What is the difference between electron and elektron?

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Elektron is the spelling for the Greek word meaning "amber". It originated as the namesake for the negatively charged subatomic particle known as the electron because of amber's affinity for developing a static charge when rubbed against certain materials, such as wool. In fact, while wool develops a positive charge (meaning it loses electrons) amber develops a negative charge by rubbing electrons off the wool.

What are the three types of solutions?

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1. Gaseous Solution- includes gases or vapors dissolved in one another. Two or more gases can form a solution. Air is an example of a gaseous solution. When dry is made up of oxygen gas dissolved in nitrogen gas.

2. Liquid Solution- contain a liquid solvent in which gas, liquid, or solid is dissolved. Water is the most common liquid solution. Many things can be dissolved in it. Table salt is an example of a solid dissolved in a liquid. A liquid and a gas can also be dissolved in a liquid solution.

3. Solid Solution- is a mixture of solids spread equally throughout one another. Metal is an example of a solid solution at room temperature.

Is Carbamide peroxide or Hydrogen Peroxide more effective for whitening teeth?

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In teeth-whitening preparations, hydrogen peroxide and carbamide peroxide are frequently utilized. Because it breaks down more quickly, hydrogen peroxide is said to be more effective for instant results and is therefore appropriate for in-office whitening procedures. However, hydrogen peroxide is gradually released by carbamide peroxide, which makes it a better option for at-home whitening kits. Both can whiten teeth successfully, but which is best depends on a number of criteria, including concentration, application technique, and specific dental needs. Seeing a dentist can help you decide which course of action is best for safely getting the desired results.

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What is the temperature of a melting ice cube?

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Any temperature above 32.0F. However, it will require more heat to actually sublimate the ice into water.

What is the empirical formula for iodine and calcium?

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As an element iodine is 'I2' and calcium is 'Ca'.

However, in combination it CaI2 ( Calcium Iodide.

What element has 16 prontons and 18 neutrons?

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It is only the protons that matter in classifying the element. Sulfur has 16 protons (An atomic number of 16).

Why can't aluminum go in the dishwasher?

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Aluminum products cannot go into the dishwasher because they will melt from the heat of the dishwasher. However, some aluminum products are dishwasher safe. If it is dishwasher safe, it will say so on the product.

What is a mixture of sub atomic particles nuclei and electrons?

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An ATOM.

The sub-atomic particles are

Protons, Neutrons. and Electrons.

The protons and neutrons are collectively named 'nucleons, because they form the nucleus of an atom.

The electrons are in energy shells around the nucleus.

What is Ca C2H3O2 2?

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Assuming that what the questioner meant (but perhaps did not have sufficient typing flexibility to write) was actually Ca(C2H3O2)2, the chemical name is "calcium acetate" or "calcium ethanoate".

What must every element have different?

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Each element has a different number of neutrons.

Occurs when a gas cools and changes into a liquid?

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When gas cools and changes into liquid, it undergoes a process called condensation. This occurs when the temperature of the gas decreases, causing its particles to lose energy and come closer together, eventually forming liquid droplets.

Think of a sizzling hot barbecue grill Can you give two examples of chemical changes in matter that may be taking place in it?

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1. solid fat melts to liquid and drips out

2. proteins break-down to cause tenderness

If you placed a solid into a liquid what would usually happen?

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The Archimedean Principle takes over.

The weight of a body immersed in a fluis is equal to the weight of the fluid disoplaced.

A solid will either float or sink , but it displaced the fluid. Sometimes the solid may absord the fluid, but there is still a displacement of fluid.

Why is ceasium astatide soluble?

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Caesium is a Group '1' elemental metal. like sodium and potassium. All group '1' metals are soluble. Hence it follows that caesium is soluble, and so caesium astatide is soluble.

How did carbon 14 get its name?

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Carbon =14 is an isotope of carbon.

Isotopes of any element contains the same number of protons, but A DIFFERENT NUMBER OF NEUTRONS. This gives isotopes of the same element different atomic masses.

The number comes from the addition of all the protons and neutrons in the nucleus. Collectively the nucleons.

Carbon-14 contains 6 protons, 8 neutrons and 6 electrons.

The '14' comes the additions of 6 + 8 = 14 .

The most common isotope of carbon is Carbon-12

Carbon-12 contains 6 protons, 6 neutrons and 6 electrons

The '12' comes from 6 + 6 = 12.

There is a third isotope of carbon , which is Carbon-13

Carbon-13 contains 6 protons , 7 neutrons and 6 electrons.

The '13' comes from 6 + 7 = 13.

Notice in all cases the number of protons does NOT change, otherwise it is a diffeerent element.

Symbollically these isotopes can be written as

Carbon -14 ; 14-C ; [14/6]C

Carbon - 13 ; 13-C ; [13/6]C

Carbon - 12 ; 12-C ; [12/6]C

NB Do NOT confuse ISOTOPES , with ALLOTROPES. Allotropes are where the element displays different physical characteristics. In the case of carbon l Graphite, Diamond and Buckminster Fullerene(Footballene).

How are barnacle's formed?

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Barnacles are a type of shellfish. They grow from free swimming larvae.

What element are sand and quartz made from?

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Both sand and quartz have the elements silicon and oxygen.

It is a crystalline structure.

The crystalline structures of sand and quartz are slightly different.

Name of cu2o?

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Cuprous oxide or copper(I) oxide. This is copper in oxidation state '1'.

A reddish lustrous ductile malleable metal element?

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A reddish lustrous ductile malleable metal element? COPPER!!!XD

Which science is the most complex chemistry or biology or physics?

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The most complex science between the 3 is biology followed by chemistry and next is physics.

This is because Biology as a science encompasses the nature and laws of life (scientifically), which means that as a science that studies life it ranges from the microscopic to macroscopic level of understand and acquiring knowledge about life. Biology in microscopic level includes the study of the cells, its components and the macromolecules that makes up for each components , how they work and what makes an organism alive up to the macroscopic level that includes the ecology understanding how organism interact with each other and with their environment, how environmental changes drives evolution and how evolution changes the way life goes with the living organisms. Hence, biology includes both understanding the science of chemistry and physics.