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all the drop boxes say compound & element. pick either or for each one.

Answer:

30.06904

Explanation:

C3H4: Mass % C = 36.033 x 100 / 40.0641 = 89

Answer:

Nonmetals and Nonmetals

Explanation:

Covalent bonding is when atoms share valence electrons. Nonmetals typically have 4, so two atoms can bond to have the total of 8.

Covalent bonds are most likely to form between atoms of this type of chemical elements: D. non-metals and non-metals.

A covalent bond can be defined as a bond that exists in chemical compounds and it typically involves the sharing of electrons between the atoms of a non-metallic chemical element.

In Chemistry, there are two (2) main types of covalent bond and these include:

Generally, a covalent bond is a type of bond that is commonly formed between two (2) non-metals while an ionic bond is usually formed between metals and non-metals.

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Answer:

crumpling of a piece of paper

Explanation:

chemical change cannot be reversed or gootten back

Answer:

Baking brownies!

Explanation:

The mixture of the ingredients undergoes a chemical change when it's heated and the substance changes very much so, melting a candle may seem like a similar change, but the wax is the exact same when it cools back down

Answer:

Magnesium ion

Explanation:

The name of the ion formed from an atom with 12 protons is magnesium ion.

 The formula of the ion is given as:

           Mg²⁺

We know this because the number of protons an atom contains can be used to identify an element.

Element with atomic number or proton number of 12 is magnesium .

 when it loses two electrons, it becomes isoelectronic with Neon and it is now stable.

Answer:

It is most of the time cheaper and more fresh than regular store bought food.

Explanation:

Explanation:

Picture A which shows an overall negative charge represents an anion. Anion are formed when an atom gains an electron. In doing that, the total number of electrons (negative charge) is greater than the number of protons (positive charge), hence it would have an overall negative charge.

Picture B which shows a neutral charge represents a neutral atom. In an atom, the number of electrons equals the number of protons.

Picture C which shows an overall positive charge represents a cation. Cation are formed when an atom loses an electron. In doing that, the total number of electrons (negative charge) is less than the number of protons (positive charge), hence it would have an overall positive charge.

Water and carbon dioxide are byproducts. Notice that photosynthesis and respiration are essentially the opposite of one another. Photosynthesis removes CO2 from the atmosphere and replaces it with O2. Respiration takes O2 from the atmosphere and replaces it with CO2.

Answer:

A

Explanation:

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Answer:

it is c.

Explanation:

there is no explanation,l took this question before

Answer:

4Fe  +  3O₂   →   2Fe₂O₃

Explanation:

The chemical reaction is given as:

          Fe  +  O₂   →   Fe₂O₃

To balance an equation implies that the number of atoms and moles must be conserved.

  using the coefficients a,b and c, let use a mathematical approach to balance the expression;

           aFe  +  bO₂   →   cFe₂O₃

Conserving Fe: a  = 2c

                     O: 2b  = 3c

let c  = 1, a  = 2 , b  = [tex]\frac{3}{2}[/tex]  

  multiply through by 2 ;

         a  = 4, b  = 3 and c = 2

                  4Fe  +  3O₂   →   2Fe₂O₃

Answer:

the two atoms will combine and release energy

Answer:

Oxygen and positive charge.

Explanation:

The value of electronegativities of oxygen is higher than hydrogen due to which a slight negative charge occur on its oxygen atom and a slight positive charge on its hydrogen atoms of water molecule. The water is polar in nature because oxygen attract the shared pair of electron that leads to partial negative charge on oxygen while on the other hand, the hydrogen atom has acquire partial positive charge.

Answer:

a dissolved substance especially or a component of a solution present in smaller amount than the solvent

Explanation:

have a good day

Answer:

A solute is a minor component in a solution, this is dissolved in the solvent.

Explanation:

Answer:

I have no clue sorry

Explanation:

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Answer:

Refer to your periodic table. Lewis dot structures are based off the number of valence electrons an atom has.

Looking at the compounds, we can see that Gallium has three valence electrons in its outer shell and oxygen has six. Oxygen and Gallium are going to share electrons with one another, making a V shape in their diagram.

One Oxygen would make a double bond with a Gallium, leaving one valence electron to another oxygen. That oxygen takes that Final electron. It now has 7 in its outer shell. The remaining Gallium and Oxygen do the same double bond as the one before, leaving the 7 valence electron oxygen with one more electron.

The Lewis dot structure of Ga₂O₃ is shown below.

In molecular structure, Lewis structures describe the relationship between molecules' atoms and their lone pairs of electrons. Lewis structures are also used to predict molecular geometry in conjunctions with hybrid orbitals.

Ga₂O₃ is the inorganic compound of gallium (III) oxide. It is a semiconductor with a very wide bandgap. It is widely used in power electronics. It is also used in phosphors and gas sensing.

There are several polymorphs of gallium oxide. The most stable polymorph of gallium oxide is the polymorph of gallium(III)(monoclinic).

To learn more about the Lewis dot structure, refer to the link:

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The image for the Lewis dot structure is shown below.

Answer: Digestive enzymes play a key role in breaking down the food you eat. These proteins speed up chemical reactions that turn nutrients into substances that your digestive tract can absorb. Your saliva has digestive enzymes in it

Explanation:

Answer: The answer is D

Explanation:Covalent bonds are formed when atoms share one or more electrons. Ionic bonds are formed when one atom transfers electrons to another atom. how are bond energy and bond strength related? Please give me Brainliest

When two atoms share six electrons with one another, the type of bond do they form is: D. a triple covalent bond.

A covalent bond can be defined as a bond that exists in chemical compounds and it typically involves the sharing of electrons between the atoms of a non-metallic chemical element.

In Chemistry, there are three (3) main types of covalent bond and these include:

A triple covalent bond is a type of covalent bond that is formed when the two (2) atoms of a non-metallic chemical element share six electrons with one another instead of the usual two in a single covalent bond.

In conclusion, a triple covalent bond is usually stronger than the equivalent single covalent bond and double covalent bond.

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Answer:

1.57 x 10⁷m

Explanation:

Given quantity is;

          1.57 x 10¹⁴nm

Now;

            1 nm  = 10⁻⁹

So, let us convert this given quantity;

         1 nm          =             10⁻⁹

  1.57 x 10¹⁴nm  will give 1.57 x 10¹⁴ x 10⁻⁹  = 1.57 x 10⁷m

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.

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Answer:

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I believe.. ............

Answer:

electrical power. nnnnnnn

Answer:

C. It increases to 4 times its original magnitude.

Explanation:

If the distance between two objects is cut in half, the gravitational force between them is increased by 4 times the original magnitude.

From Newton's law of universal gravitation, the gravitational force of attraction between two bodies is directly proportional to the product of their masses and inversely proportional the the square of their masses.

lt the original distance  = 4

Fg  = [tex]\frac{x }{4^{2} }[/tex]

New distance  = 3

  Fg = [tex]\frac{x}{2^{2} }[/tex]  

So;

          [tex]\frac{x}{2^{2} }[/tex]  /    [tex]\frac{x }{4^{2} }[/tex]  = 4

Answer: It’s C

Explanation:

Answer:

²⁰²Hg₈₀ ----> ²⁰²Tl₈₁ + ⁰₋₁e

Explanation:

The radioactive decay of the atom of an element by the emission of a beta-particle is equivalent to the splitting of a neutron in the nucleus of the radioactive element into an electron and a proton. The proton is retained by the nucleus whereas the electron is emitted as a beta-particle. This retention of the proton results in an increase of the atomic number by 1. A beta-particle is an electron. The electron is a very light particle and its loss makes no significant change in the mass number of the atom involved.

The beta decay of Hg-202 results in an increase of the atomic number from 8-0 to 81. Hence, Hg-202 is transformed to Tl-202. the balanced nuclear equation is given below:

²⁰²Hg₈₀ ----> ²⁰²Tl₈₁ + ⁰₋₁e

Answer:

Arsenic pentoxide

Explanation: