How does a balanced chemical equation satisfy the Law of Conservation of Mass?

The fireworks are colorful and neon signs are orange in color.

When a firework is fired, the atoms of the various chemical compounds inside it absorb energy.

When the electrons return to lower energy levels, they emit colored light.

Various colors can be produced depending on the chemical employed. In glass tubes filled with neon, gas is neon lights or signage.

When the lamp is plugged in, the electrical energy causes the neon electrons to leap to higher energy levels; when they go to lower levels, colorful light is given out.

The neon never runs out, which is neat. Electrical energy is the sole resource that is consumed.

Since they are not destroyed, the electrons can be employed repeatedly to advance through levels.

The orange light that neon emits is visible.

Even while neon signs often glow in orange light, there are many other hues that can be used.

The changes occur when other gases, such as argon or krypton, or painting the tube to generate a specific hue when lit, are used instead of neon.

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Answer:

1. 34.25

2.716

3.0.02181

4.1,323.194921978313 round use calculator

5.9.89

6.90 or 91

7.0.0269

Explanation:

Round if you can

Yes this statement is true because the concentration is two help determine whether the reaction is moving forward or backwards direction

Here it is at standard condition and delta g not is always the same because it denote that the reactant/product are at standard temperature or product as the reaction goes toward equilibrium delta g change because reaction is proceeding forward and  delta g not is standard change in free energy between reactant and product. delta g is used to find gibbs free energy in nonstandard conditions while delta g naught is used to determine gibbs free chemical reaction energy under normal conditions. that's why this statement is true.

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Sugar Heat The sugar is in tiny white debris in a pile. warmth is not seen but is implied through the heat source. The pile of sugar in the pot has a mass of one hundred grams. there may be a stable, light brown mass at the lowest of the pot. It has a mass of 100 grams.

The mass of the sugar is the same in melted form as it is in strong crystal form. there has no longer a chemical response. Sugar did not trade composition. It most effectively melted. Melting point is a physical property, and this is bodily change. metallic Wool  Oxygen fireplace The metal wool has a silky look and it is rolled up and has a mass of 6 grams.

The oxygen is not visible however it's far internal of an oxygen tank which has a mass of 1 gram.  there's brown mustard color sand in a pile and has a mass of seven grams.  The mass of the steel wool turned into blended with the mass of the oxygen tank and that became the same seven grams.  there has been a chemical reaction. The metallic wool blended with the oxygen of the tank creates a brand new substance known as iron oxide. Egg heat The egg is vicinity on a flat floor and has its shell on. The egg has a mass of forty-five grams. the heat isn't visible however is implied with the aid of the heat supply of the kitchen.  The egg is cooked and it's far cut loose from the shell. It has a mass of 45 grams the cooked egg 40 grams and the shell five grams.

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The density of water is 1.94 [tex]slug/ft^3[/tex] if 997 kg/m^3 is rounded to 1000.

The density of a liquid is distinct from that of a solid.

A liquid's density serves as a gauge for its relative weight in relation to the quantity being evaluated. The liquid that weighs heavier is more dense if you weigh or measure the same volume of two different liquids.

It will float on the water if you add a liquid that is less dense than water to the surface of it. The surface of the water will sink if a substance is added that has a density greater than water.

Some examples are:

Liquid                        Temperature         Density

Alcohol, methyl                25                  786.5

Alcohol, propyl                 25                      800

Ammonia (aqua)                 25                   823.5

Aniline                                 25                    1019

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Answer:

true.nitric acid reacts with those chemicals to form aqueous nitric acid

Answer:

Rutherford proved J.J is wrong.

Explanation:

The Plum Pudding Model which was put forth by J.J Thompson stated that atoms are tiny particles of positively charged particles, with tiny negative charged particles stuck inside.

When Rutherford did the goldfoil experiment, he concluded that electrons (the negatively charged particles) actually revolve around the nucleas.

what's the nucleas?

So this too, was put forth by Rutherford that there is a centre of positive charges in an atom called nucleas it consists of protons and neutrons

hence, Rutherford proved that Plum Pudding Model was wrong.

hope I helped you :)

The three variables in the density equation are the mass of the substance, the volume of the substance, and the density of the substance.

A variable is a characteristic that can be measured (such as mass, acceleration, volume, height, etc.) and that can take on different values.

An experiment typically has three types of variables:

Now, in density equation i,e,. Density = Mass/Volume.

The volume of the substance is the independent variable, while its mass is the dependent variable, because as the volume of the substance increases, so does its mass. As a result, mass depends on volume.

Density, on the other hand, is the controllable variable because its mass-to-volume ratio remains constant for any particular substance.

Thus, in the density equation, mass is the dependent variable, volume is the independent variable and density is the controlled variable.

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A Fluorine chlorine bromine iodide is the order of the elements that is ordered from small atomic radius to largest atomic radius as per their electrons and atom sizes.

A chemical element's atomic radius, is technically known as the average or typical distance between the nucleus's core and the outermost isolated electron, serves as a gauge for the size of an atom.

There are numerous types of non-equivalent definitions of atomic radius, and this is because the border is not a clearly defined physical entity.

Only by measuring the separation between the nuclei of two contacting atoms and halving that distance can one determine the radius of an atom, and this stands true in the case of a covalent bond.

A reduced atomic radius is the result of the electron cloud being drawn closer to the nucleus due to a higher effective nuclear charge's greater attraction to the electrons.

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Correct Question

Which set of elements are ordered from small atomic radius to largest atomic radius?

a. Fluorine, Chlorine, Bromine, Iodine

b. Bromine, Iodine, Chlorine, Fluorine

c. Chlorine, Fluorine, Bromine, Iodine

d. Iodine, Bromine, Chlorine, Fluorine​

The statement true about the environment of most of the earth is that it usually in equilibrium but easy to change on a small scale.

Therefore, Option 3 is correct statement

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Substance that is composed of two or more elements or compounds that are not chemically combined is called mixture.

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The gaseous element having 5 valence electrons and fewer neutrons than sodium is Nitrogen.

Nitrogen has the atomic number 7, and it is represented by the symbol 'N'. Nitrogen is a nonmetallic compound and is light in weight. It is found in abundance in the atmosphere. Nitrogen usually exists in oxidation states of -3, +3, and +5. It has five valence electrons, 7 protons, and 7 neutrons, while the number of protons and neutrons in Sodium having atomic number 11 are 11 and 12 respectively. The atomic configuration of nitrogen is 1s², 2s², and 2p³. Valence electrons may be defined as the number of electrons that can be lost or gained by an atom to achieve the configuration of noble or inert gases.

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[tex]N_{(1*2)} O_{(2*2)} = N_{2} O_{4}[/tex] this is the molecular formula.

Whole-number multiple =[tex]\frac{90 g/mol}{46.01 g/mol}[/tex] ≈ 2

Multiplying the subscripts of [tex]N_{1} O_{2}[/tex] by 2, the molecular formula is

[tex]N_{(1*2)} O_{(2*2)} = N_{2} O_{4}[/tex]

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Answer:

measure suits the most here

Decrease the number of bases in the sequence will fall under the category of deletion mutation.

Therefore, Decrease the number of bases in the sequence is deletion mutation.

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Answer:

It is observed in various ways;

- Through electromagnetic waves:

Gamma rays, x-rays, ultraviolet rays and visible light are all electromagnetic.

- In electromagnetic devices

For example in motors and generator.

I'll describe that in a motor

Description;

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Answer:

According to the Law of Definite Proportions, a chemical compound will always include the same weight proportions of each element, regardless of the quantity or source.

Explanation:

For instance, 21.5 grams of carbon and 28.5 grams of oxygen make up a 50-gram sample of carbon monoxide.

Answer: The law of definite proportions states that a given chemical compound always contains the same elements in the exact same proportions by mass

Explanation: The discovery that mass was always conserved in chemical reactions was soon followed by the law of definite proportions, which states that a given chemical compound always contains the same elements in the exact same proportions by mass. As an example, any sample of pure water contains 11.19% hydrogen and 88.81% oxygen by mass. It does not matter where the sample of water came from or how it was prepared. Its composition, like that of every other compound, is fixed.

Another example is carbon dioxide. This gas is produced from a variety of reactions, often by the burning of materials. The structure of the gas consists of one atom of carbon and two atoms of oxygen. Carbon dioxide production is of interest in many areas, from the amount we breathe to the amount of the gas produced by burning wood or fossil fuels. By knowing the exact composition of carbon dioxide, we can make predictions as to the effects of different chemical processes.

I hope this helps :)

Thus, we can conclude that following compounds are classified as follows.

[tex]CH_3CH_2OH[/tex] - can be both acid and base

[tex]CH_3CH_2CH_2CH_3[/tex] - very weak acid

[tex]CH_3CO_2CH_3[/tex] - can be both acid and base

According to Bronsted-Lowry an acid is defined as the specie which is able to donate hydrogen ions when dissolved in water.

On the other hand, bases are the species which are able to donate hydroxide ions when dissolved in water.

A specie which is able to accept a hydrogen atom and also able to donate a hydroxide ion will act as both acid and a base.

For example,  [tex]CH_3CH_2OH[/tex] is able to donate a hydroxide ion and simultaneously can accept a hydrogen ion.

In [tex]CH_3CH_2CH_2CH_3[/tex]  , the hydrogen atoms are strongly held together by the carbon atoms due to the small electronegativity difference between carbon and hydrogen atom. Hence, it will be a weak acid.

On the other hand, [tex]CH_3CO_2CH_3[/tex]  can loose a hydrogen atom or it can also gain a hydroxyl group. This is due to the electronegativity difference between oxygen and hydrogen atom.

Therefore:

[tex]CH_3CH_2OH[/tex] - can be both acid and base

[tex]CH_3CH_2CH_2CH_3[/tex] - very weak acid

[tex]CH_3CO_2CH_3[/tex] - can be both acid and base

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The number of moles of indicated substance in each sample is -

a) 6.14 x 10⁻⁴ mol

b) 3.1 x 10⁵ mol

c) 0.4 mol

d) 2.45 mol

e) 0.16 mol

To calculate number of moles of each substance in sample -

a) Sulfur trioxide

  Given mass = 49.2 mg = 0.0492 g

   Molar mass = 80.06 g/mol

   Number of moles of sulfur trioxide = Given mass

                                                                  Molar mass

                                                             = 0.0492g = 6.14 x 10⁻⁴mol

                                                                80.06 g/mol

b) Lead(iv) oxide

   Given mass = 7.44 x 10⁴ kg = 7.44 x 10⁷ g

   Molar mass = 239.2 g/mol

   Number of moles of lead(iv)oxide = Given mass

                                                                Molar mass

                                                            = 7.44 x 10⁷g = 3.1 x 10⁵mol

                                                               239.2 g/mol

c) Chloroform (CHCl₃)

   Given mass =59.1 g

    Molar mass = 119.38 g/mol

    Number of moles of chloroform = Given mass

                                                               Molar mass

                                                           =  59.1 g         = 0.4 mol

                                                               119.38 g/mol

d) Trichloroethane (C₂H₃Cl₃)

   Given mass = 3.27 mg = 0.00327 g

   Molar mass = 133.4 g/mol

   Number of moles of trichloroethane = Given mass

                                                                     Molar mass

                                                                 = 0.00327 g   = 2.45 mol

                                                                    133.4 g/mol

e) Lithium hydroxide

   Given mass = 4.01 g

   Molar mass = 23.95 g/mol

   Number of moles of Lithium hydroxide = Given mass

                                                                        Molar mass

                                                                     = 4.01 g           = 0.16 mol

                                                                         23.95 g/mol

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Conducting a comparative investigation is always less expensive than an investigation in which data is obtained from the Internet.

Information theory and efforts to construct and connect computer networks that were the result of American research and development and international collaboration, particularly with scholars in the United Kingdom and France, are at the root of the history of the Internet.

In the late 1950s, The Internet field of computer science was just beginning to take time-sharing among computer users into account. Later, Internet explored if this could be done across wide area networks. Independently, Donald Davies developed packet switching at the National Physical Laboratory (NPL) in 1965 and proposed a national commercial data network in the UK. Paul Baran proposed a dispersed network based on data in message blocks in the early 1960s.

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The complete reaction is Hydrochloric acid + Copper carbonate = calcium chloride +carbon dioxide + water

This reaction is an example for decomposition reaction. A chemical breaking down into two or more simpler compounds is known as a decomposition process. A decomposition reaction has the general form AB  ———- A+B. The majority of decomposition processes demand an energy input in the form of heat, light, or electricity. three types Reaction to thermal decomposition. Heat-induced chemical reaction when one material splits into two or more compounds.

Reaction of electrolytic decomposition.

Decomposition by sunlight

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Calcium chloride, carbon dioxide, and water are the end products of the whole reaction between hydrochloric acid and copper carbonate.

There are three ways through which we can decomposed the compound into simpler substance.

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Answer:

5cm is the answer because 5-5 is o and the one 5 is remaining so 5 is the answer.

Answer:

2.21

Explanation:

Answer:

Is less than

Explanation:

Vinegar contains more chemicals and molecules in it thus has a higher density thus pushing the oil upward because there is no room for the oil

When a vinegar and oil salad dressing separates into two layers, the oil floats on top of the vinegar, the density of the oil is less than the density of the vinegar.

A substance's density is a measurement of how heavy it is in relation to its size. When placed in water, an object will float if its density is lower than that of the water, whereas it will sink if its density is higher.

The density of a material is a distinguishing quality that is independent of the substance's volume.

A nonpolar material won't dissolve in a polar one. When oil and vinegar are combined, the vinegar is more thick and polar than the oil and sinks to the bottom of the container.

Because it is nonpolar and less thick than the vinegar, the oil floats on top rather than dissolving in it.

Thus, the density of oil is less than the vinegar.

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The mass of KHP dissolved in 50.00 mL of the titrant is 0.5634 g.

KHP and NaOH react in a 1:1 ratio. That means that the amount of NaOH used is equal to the amount of KHP in the sample. We can calculate this amount:

c = n/V, so n = c * V = 0.049 M * 0.025 L = 0.001225 mol of NaOH and KHP

With this, we can calculate the amount of KHP in the 50.00 mL sample:
22.20 mL : 0.001225 mol = 50.00 mL : X

X = 0.001225 mol * 50.00 mL / 22.20 mL = 0.002759 mol

Finally, using the molar mass of KHP (204.22 g/mol), we calculate the mass of KHP in the titrant:

n = m/M, so m = n * M = 0.002759 mol * 204.22 g/mol = 0.5634 g

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