The reactants of two chemical reactions are shown.

Reaction 1: HCl and NaOH
Reaction 2: Cu and AgNO3

Which reaction is likely to be a redox reaction?
A) Reaction 1, because hydrogen and hydroxide atoms will be formed.
B) Reaction 1, because all ions formed will retain their electrostatic charges.
C) Reaction 2, because the electrostatic charge on copper ion will change.
D) Reaction 2, because the charges on each side of the equation will be unequal.

Answer:

false :)

Explanation:

Hello There!

The carbon bond strengths of graphite and diamonds are not identical.

"FALSE STATEMENT"

Answer:

It’s simple. You’re doing it right, the question is just messed up. If you think about it it’s like H2O

Explanation:

Answer:

The answer is C7H8N4O2.

Same problem as your other question - you rounded in a place where you shouldn't have (see explanation below, exact same process)!

Explanation:

These are percents by mass. Pretend you have a 100g sample. That means you have:

46.66g C

4.48g H

31.10g N

17.76g O

Divide each by molar mass to find the moles of each:

C: 46.66 / 12 = 3.89 mol

H: 4.48 / 1 = 4.48 mol

N: 31.10 / 14 = 2.22 mol

O: 17.76 / 16 = 1.11 mol

Now divide each of these values by the lowest of the three to find the ratio between each element in the compound:

C: 3.89 / 1.11 ≈ 3.5

H: 4.48 / 1.11 ≈ 4

N: 2.22 / 1.11 = 2

O: 1.11 / 1.11 = 1

As with your other question, 3.5 is too different from 3, so you can't round it down. The .5 makes it easy to find the LCD - it's 2. Multiply each of the numbers by 2 to get your final answer:

C: 3.5 x 2 = 7

H: 4 x 2 = 8

N: 2 x 2 = 4

O: 1 x 2 = 2

Again, if you were to take the percent masses of the empirical formula you came up with, you'll see they're quite different from the one the question provided, which is why you can't round in this situation.

Answer:

The first blank is half

The second blank is replicated

Explanation:

Cells produced at the end of telophase I have half as many replicated chromosomes as cells that started the process.

Explanation:

Every gas molecules are held by weak Vander waal forces because of which each molecule of a gas is free is move from one place to another.

This causes more number of collisions between molecules of a gas and gaps will also increase between each molecule.

As a result, gases are able to diffuse or spread at a faster rate.

Hence, generally it is true about the particles in a gas that gases diffuse at a faster rate.

Answer:

The ossicles amplify the sound. They send the sound waves to the inner ear and into the fluid-filled hearing organ (cochlea). Once the sound waves reach the inner ear, they are converted into electrical impulses. The auditory nerve sends these impulses to the brain.

Sound waves enter the outer ear and travel through a narrow passageway called the ear canal, which leads to the eardrum. The bones in the middle ear amplify, or increase, the sound vibrations and send them to the inner ear—also called the cochlea—which is shaped like a snail and is filled with fluid.

Answer:

its (A) trust me I had that same qeu

Explanation:

Answer:

increases

Explanation:

The barometer is a device that uses mercury in order to work and be able to measure the air pressure. The mercury reacts to the air pressure, so it either goes up or down. If the mercury goes down, that means that it is pressed more, thus the air pressure has increased, or rather is higher. If the mercury is lifting up, that means that there is less pressure from the air, thus the air pressure has declined, or rather is lower. It is a simple device that manages to do a very important job, and it is one of the most important devices used by the meteorologists for telling the current weather conditions, as well as predicting them for the next few days.

These are two questions and two answers

Question 1.) The atomic emission spectrum of hydrogen includes four visible colors of light: red, blue-green, indigo, and violet. Which color of light corresponds with the largest electron transition?

A.) blue-green

B.) red

c.) indigo

d.) violet

Answer:

Explanation:

The atomic emission spectrum is the set of coloer lines or frequencies of electromagnetic waves emitted by the atoms of an element due to the transition of the electrons from an upper energy level to a lower energy level.

The higher the jump of the electron during the transition,  the higher the energy of th emssion and the higher the frequency of the electromagnetic wave emitted.

The color of light is related with the frequency of the electromagnetic wave.

The order of the frequencies for the visible light are:

Then, violet is the visible light with the highest energy, whicn means that it corresponds to the largest electron transition.

Quesiton 2.) Hydrogen’s emission spectrum includes a line of violet light that has a frequency of 7.31∗10¹⁴ Hz. What is the energy (in joules) a photon of the violet light?

Answer:

Explanation:

The energy of a photon of light is related with its frequency by the Planck - Einstein equation:

Where,

Then, you can just substitute the frequency and the constant to obtain the energy:

(1) The color of light that corresponds with the largest electron transition is violet.

(2) The energy of the violet light with the given frequency is 4.84 x 10⁻¹⁹ J.

The increasing order of the frequencies of the visible light in electromagnetic spectrum include the following:

Thus, the color of light that corresponds with the largest electron transition is violet.

(2)

The energy of the violet light with the given frequency is calculated as follows;

E = hf

where;

E = (6.626 x 10⁻³⁴) x (7.31 x 10¹⁴)

E = 4.84 x 10⁻¹⁹ J.

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Answer:

Thermal energy from the fire is transferred to the water in the pot in the form of heat

Explanation:

A good explanation as to why water boils in a pot sitting over fire is; Thermal energy from the fire is transferred to the water in the pot in the form of heat

Answer:

[tex]\rm ^{216}_{\phantom{2}84}Po \to ^{\phantom{-}0}_{-1}\beta + ^{216}_{\phantom{2}85}At[/tex].

Both mass number (A) and atomic number (Z) shall conserve. Hence the mass number of the daughter nuclide shall be 216 and its atomic number be 85.

Let the mass number of the daughter nuclide be [tex]A[/tex].

[tex]216 = 0 + A[/tex].

[tex]A = 216[/tex].

Let the atomic number of the daughter nuclide be [tex]Z[/tex].

[tex]84 = (-1) + Z[/tex].

[tex]Z = 85[/tex].

Look up the atomic number of the daughter nuclide in a modern periodic table. Alternatively, given that this reaction is a beta-minus decay, look for the element to the right of the parent nuclide.

Explanation:

Nuclides are made of neutrons and protons.

The mass number shall thus be greater than or equal to the atomic number of a nucleus. However, note that occasionally the atomic number of electrons (beta-minus particles) is written as -1. The atomic number of positrons (beta-plus particles, the antiparticle of electrons) is written as +1. Beta particles do not contain protons or neutrons and might not satisfy rule [tex]A \ge Z[/tex].

[tex]^{A}_{Z}\mathrm{X}[/tex].

By convention

Both mass number and atomic number shall conserve in nuclear reactions. In other words, the sum of all mass numbers on the left-hand side of a nuclear equation shall be the same as the sum of all mass numbers on the right-hand side. So is the case with atomic numbers. For this nuclear equation,

Mass number on the left-hand side:

Mass numbers on the right-hand side:

Mass numbers conserve. Therefore,

[tex]216 = 0 + A[/tex].

[tex]A = 216[/tex].

Similarly,

Atomic number on the left-hand side:

Atomic numbers on the right-hand side:

[tex]84 = (-1) + Z[/tex].

[tex]Z = 85[/tex].

Refer to a modern periodic table. What is the element with the atomic number [tex]Z = 85[/tex]? Astatine.

Alternatively, notice that the atomic number [tex]Z[/tex] has increased by [tex]1[/tex] relative to the parent nuclide [tex]\rm ^{216}_{\phantom{2}84}Po[/tex]. Elements on a modern periodic table are order in the increasing order of atomic numbers. As a result, the daughter nuclide shall be on the right of the parent element.

Complete the atomic symbol of the daughter nuclide:

[tex]\rm ^{216}_{\phantom{2}85}At[/tex].

Final answer:

The balanced nuclear equation for the decay of polonium-216 with an emission of a beta particle is: ^{216}Po_{84}
ightarrow 0_{-1}eta + ^{216}At_{85}. The daughter nuclide is astatine-216.

Explanation:

The student has asked to write a balanced nuclear reaction for the decay of polonium-216 (216Po) with an emission of a beta particle (0-1eta). The Law of Conservation of Matter dictates that the sum of the mass numbers (top numbers) and the atomic numbers (bottom numbers) must be the same on both sides of the reaction. This is a fundamental principle in balancing nuclear reactions, also known as nuclear accounting.

To find the daughter nuclide in the given decay reaction, we recognize that the emission of a beta particle (0-1eta) increases the atomic number by 1, but does not change the mass number. Thus, the daughter nuclide will have an atomic number of 85 and a mass number of 216. Since the periodic table is organized by atomic number, we can easily look up element 85 to find that it is astatine (At), making the daughter nuclide 216At.

The balanced nuclear equation is:

216Po84 ightarrow 0-1eta + 216At85

The Ideal Gas Law states that pressure and temperature are directly related, while pressure and volume are inversely related. Likewise, volume and temperature are directly related, while moles are proportional to temperature, pressure, and volume.

The Ideal Gas Law is represented by the equation PV = nRT, where 'P' is pressure, 'V' is volume, 'n' is the number of moles, 'R' is the gas constant, and 'T' is temperature (in Kelvin).

This equation demonstrates that:

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The Ideal Gas Law, described by the equation PV=nRT, shows how pressure, volume, temperature and number of moles of a gas are related. They are all proportional to each other, with pressure and volume inversely proportional, and temperature and number of moles directly proportional.

The Ideal Gas Law is represented by the equation PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the universal gas constant, and T is the absolute temperature. This equation describes how, under many conditions, the pressure, volume and temperature of a gas relate to each other.

Pressure is directly proportional to temperature and the number of moles, and inversely proportional to volume. Therefore, if the temperature or number of moles increases, the pressure increases, and if the volume increases, the pressure decreases.

Volume is directly proportional to temperature and the number of moles, and inversely proportional to pressure. Hence, an increase in temperature or number of moles will increase the volume, whereas an increase in pressure will decrease the volume.

Temperature is directly proportional to pressure, volume, and the number of moles. Thus, an increase in any of these variables leads to an increase in temperature.

Lastyly, the variable n represents the number of moles of gas present and it is directly proportional to pressure, volume, and temperature. As the number of moles increases, so does the pressure, volume, and temperature.

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Answer:

C.Chemicals can help or hurt our world.

Explanation:

Chemistry: it is a branch of science which study  the composition, properties and activity of organic substances and inorganic substances and various elementary forms of matter.

It study chemical reactions,properties and phenomenon etc.

In chemistry, we use chemicals for chemical reactions.

Drugs are made with salt like aspirin .Salt are chemicals.

Chemical use in drugs and drugs are used for treatment of diseases.

Then, chemicals are useful in these case.

But, the chemicals used in fertilizers, use for  production increase of fruits and vegetables.Then it is harmful for humans and soils.

In this way it harmful  for our world.

Hence, chemicals can help or hurt our world is correct answer.

Answer:C.Chemicals can help or hurt our world.

The correct option is C, Chemicals can help or hurt our world.

Chemistry plays a significant role in shaping our world and has both positive and negative impacts. Here are a few ways in which chemistry affects our world:

Medicines and Healthcare: Chemistry is crucial for the development and production of medicines, allowing us to treat diseases, alleviate symptoms, and improve overall health. It enables the discovery of new drugs, the understanding of biochemical processes, and the synthesis of pharmaceutical compounds.

Agriculture: Chemistry is involved in various aspects of agriculture, such as the development of fertilizers, pesticides, and herbicides. These chemicals help increase crop yields and protect plants from pests and diseases. Additionally, chemistry is essential in studying soil composition, plant nutrition, and developing new agricultural technologies.

Energy Production: Chemistry plays a vital role in energy production, including fossil fuels, nuclear power, and renewable energy sources. It is involved in the extraction, processing, and transformation of energy resources. Chemistry also contributes to the development of more efficient and sustainable energy technologies, such as batteries and solar cells.

Materials and Manufacturing: Chemistry enables the synthesis and manipulation of materials, leading to the development of new products and technologies. It is involved in the production of plastics, metals, ceramics, and composite materials, which are used in various industries like construction, electronics, automotive, and aerospace.

Environmental Impact: While chemicals have improved various aspects of our lives, they can also have negative effects on the environment. Certain chemicals, when released into the environment without proper management, can cause pollution and harm ecosystems. For example, industrial pollutants, emissions from vehicles, and improper waste disposal can lead to air, water, and soil pollution.

It is important to note that the impact of chemicals on the world depends on how they are used, managed, and regulated. Responsible and sustainable chemical practices can minimize negative effects and maximize the benefits of chemistry in our society.

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Answer:

the 3rd option for make sense,so that's out

Dalton was the pioneer behind the atomic model,but he certainly didn't believe in the nucleus or electrons,much lest electron shells.

Chadwick's discovery was the discovery of the neutron,not electron energy levels.

Niels Bohr's model was an attempt at explaining the hydrogen atom's spectrogram,followed by Erwin Schrödinger.Thus the first option is the answer

Niels Bohr's model of the atom, which posits electrons in fixed energy levels, was supported by observations of the hydrogen atomic spectrum. This spectrum showed distinct lines corresponding to electron transitions, which corroborated Bohr's theory that electrons occupy specific allowed orbits.

Niels Bohr, a Danish physicist, introduced a groundbreaking model of the atom in 1913. Central to Bohr's model was the concept that electrons move in definite orbital paths around the nucleus with specific allowable energy levels, which he referred to as stationary states. This idea was demonstrated using the hydrogen atomic spectrum as evidence, where the emitted light could be seen as distinct lines, each corresponding to an electron moving between these fixed energy levels.

In Bohr's theory, each energy level is quantized, meaning electrons can only occupy certain regions of space at certain energy levels. The electron can jump from one energy level to another, but it does not emit or absorb energy while staying in a given energy level. The hydrogen atomic spectrum provides a visual representation of these jumps as unique spectral lines created when electrons move back to lower energy levels, releasing energy in the form of light.

Bohr's conclusions were primarily derived from observations of the hydrogen atomic spectrum. Hence, option A, Hydrogen atomic spectrum, is the strong support for Bohr's belief that electrons occupied different energy levels. His model successfully predicted the energy levels for hydrogen, earning him the Nobel Prize in Physics in 1922. However, this model could not fully explain the spectra of atoms with more than one electron.

Answer:

your answer to your question is B

I think answer of this question is D

Answer:

C

Explanation:

same electron configuration

Answer:

C12H12NO3

Explanation:

Answer:

The answer is C8H8O3.

You rounded in a place where you shouldn't have (see explanation below)!

Explanation:

These are percents by mass. Pretend you have a 100g sample. That means you have:

63.15g C

5.30g H

31.55g O

Divide each by molar mass to find the moles of each:

C: 63.15 / 12 = 5.26 mol

H: 5.30 / 1 = 5.30 mol

O: 31.55 / 16 = 1.97 mol

Now divide each of these values by the lowest of the three to find the ratio between each element in the compound:

C: 5.26 / 1.97 ≈ 2.67

H: 5.30 / 1.97 ≈ 2.69

O: 1.97 / 1.97 = 1

These aren't whole numbers and you can't just round up. If the numbers you ended with were something around 2.98, I would be fine with rounding to 3. But here 2.67 is too different from 3 to the point where we're actually considering a completely different compound.

So, we need to multiply them all by some factor to get whole numbers that will make sense in a chemical formula. If you express 2.67 and 2.69 as fractions, you get about 8/3, and 1 can be represented as 3/3, so 3 is the LCD of all three numbers. Multiply each of the numbers by 3 to get your final answer:

C: 2.67 x 3 ≈ 8

H: 2.69 x 3 ≈ 8

O: 1 x 3 = 3

Side note: if you take the percent masses of the empirical formula you came up with, you'll see they're quite different from the one the question provided, which is why you can't round in this situation:

Finding mass using your empirical formula:

C: 3 x 12 = 36

H: 3 x 1 = 3

O: 1 x 16 = 16

Total mass = 36 + 3 + 16 = 55

% mass:

C: 36/55 = 65.45% (vs. 63.15%)

H: 3/55 = 5.45% (vs. 5.30%)

O: 16/55 = 29.09% (vs. 31.55%)

The values differ by more than 2% in some cases!

Answer:

Explanation:

The nuclide isotope notation represents the isotope by its chemical symbol preceded by a superscript (to the left of the chemical symbol) showing the mass number and a subscript (also the the left of the chemical symbol) showing the atomic number (number of protons).

Copper-70:

Nuclide notation:

Answer:

I want to say B but I'm not sure

Answer:

The statement E is true on average kinetic energy; and mass and temperature.  If gases from different types have same quantity of mass and same quantity of temperature then there will be same quantity in average kinetic energy.

Explanation:

The gaseous kinetic theory has the assumption that the size of molecules in any compound is very small compared to the distance between them. Also, the molecules are always in a vibration and it collides with boundary of cylinder and with each other.

In reference to the kinetic theory of gases, the different gases having different mass at same temperature always have the same quantity of average kinetic energy because the average kinetic energy of gases has directly proportional relation to the gaseous temperature.

The gas at higher temperature has higher kinetic energy amount and vice-versa.

Answer:

Amount of oxygen = 2 * 5.43 moles

                             = 10.86 moles

Explanation:

Answer:Correct answer 10.9

Explanation:

The total number of dissociated ions in a chemical reaction is shown by the entire ionic equation. Ions that are visible on both sides of the reaction arrow are canceled out by the net ionic equation. The correct option is A.

A chemical equation known as an ionic equation expresses the electrolytes in aqueous solution as dissociated ions. The ionic species are usually followed by (aq) in the equation to denote that they are in an aqueous solution, and this is typically a salt that has been dissolved in water.

The molecular equation is:

HNO₃ + NaOH → NaNO₃ + H₂O.

And the ionic equation: H⁺ + OH⁻ → H₂O.

Na⁺ and NO₃⁻ ions are in an aqueous solution on both sides of the equation, so they are spectator ions. They are not part of the net ionic equation.

So, the net ionic equation is:

H⁺ + OH⁻ → H₂O.

Thus the correct option is A.

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The correct total ionic equation is: H⁺ + NO₃⁻ + Na⁺ + OH⁻ → Na⁺ + NO₃⁻ + H₂O which corresponds to option C.

When considering the reaction between HNO₃ and NaOH, we start by identifying the complete ionic equation. Since both HNO₃ and NaOH are strong electrolytes, they will dissociate completely in aqueous solution:

The total ionic equation for the reaction then becomes:

Here, Na⁺ and NO₃⁻ are spectator ions as they do not participate in the reaction. Thus, the net ionic equation, which shows only the species that undergo chemical change, is:

Therefore, the correct complete ionic equation for the reaction is:

Complete Question: -

Which equation represents the total ionic equation for the reaction of HNO₃ and NaOH?
A. H⁺ + OH⁻ → H₂O
B. HNO₃ + NaOH → NaNO₃ + H₂O
C. H⁺ + NO₃⁻ + Na⁺ + OH → Na⁺ + NO₃⁻ + H₂O
D. H⁺ + NO₃⁻ + OH⁻ → NO₃⁻ + H₂O

Answer:

The answer is B (sodium is more reactive)

Explanation:

The lesser reactive element to magnesium is present on the left side of the magnesium in the periodic table in the same row. Thus, option B is correct.

The periodic table is given as the arrangement of the elements in columns and rows based on the increasing order of the atomic number and the number of valence electrons.

In a periodic table, on moving from left to right reactivity increases, and from top to bottom reactivity decreases.

Thus, the element with the lesser reactivity than magnesium is present in the left of the magnesium in the same row. Thus, option B is correct.

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Answer:

This solution is likely to be basic.

Assumption: this solution is under room temperature, where [tex]K_w = 10^{-14}[/tex].

Explanation:

The concentration of hydronium ions [tex]\mathrm{H_3O^{+}}[/tex] in the solution can be found from the [tex]\mathrm{pH}[/tex] value. This relationship does not depends on temperature.

[tex]\mathrm{[H_3O^{+}]} = 10^{-\mathrm{pH}} = 10^{-8.55}[/tex].

The question states that for this solution, [tex]\rm [H_3O^{+}] = 8.55\;M[/tex]. Apply the relationship between [tex]\mathrm{[H_3O^{+}]}[/tex], [tex]\mathrm{[OH^{-}]}[/tex], and [tex]K_w[/tex]. Note that the value of [tex]K_w[/tex] is dependent on the temperature of the solution.

[tex]\displaystyle \rm [OH^{-}] = \frac{\mathnormal{K_w}}{[H_3O^{+}]} = \frac{10^{-14}}{10^{-8.55}} = 10^{-5.45}\; M[/tex].

In other words,

[tex]\rm [H_3O^{+}] < [OH^{-}][/tex].

In other words, this solution is basic.

Answer:

18 True

19 True

20 False

21 True

Explanation:

Answer:

Co2 and 2H2O are products

Explanation:

In this chemical equation, CH4 and 2O2 react with each other to create a double replacement reaction which creates CO2 and 2H20

Hope this helps!

Answer:

0.75g

Explanation:

From the given problem, the known parameters are:

Number of mole of BeO = 0.03mole

The unknown is the mass of BeO = ?

The formula of the compound is BeO

To solve this kind of problem, we use the mole relationship between number of mole and mass. This is expressed below mathematically:

          Mass of BeO = number of moles of BeO x Molar mass of BeO

The molar mass of BeO:

Atomic mass of Be = 9g

Atomic mass of O = 16g

Molar mass of BeO = 9 + 16 = 25g/mol

Mass of BeO = 0.03 x 25 = 0.75g

The mass of BeO that participates is 0.75g

The mass of Beryllium oxide that participates in the chemical reaction is 0.7506 grams.

To calculate the mass of Beryllium oxide that participates in the chemical reaction, we need to convert the given amount of moles to grams. The molar mass of Beryllium oxide (BeO) is 25.02 g/mol. Since we know that 0.0300 moles of BeO participate in the reaction, we can use the formula:

Mass = moles × molar mass

Mass = 0.0300 mol × 25.02 g/mol = 0.7506 g

Therefore, the mass of Beryllium oxide that participates in the chemical reaction is 0.7506 grams.

independent variable is temperature and dependent is the number of cold drinks sold. It's because the temperature is being changed without any outer influence while the number of cold drinks sold changes based on the weather. It's like cold drinks are going to sell better in the summer because it's hot vs in the winter because it's cold. The change in temperature isn't relying on anything but the drink is.

Answer:

the scattering and reflection of light by dust particles

Answer:

the scattering and reflection of light by dust particles

Explanation:

The process of scattering is responsible for the different colors we see in the sky.

Different colors have have some different wavelengths, and hence, scatter accordingly.

The small dust particles that is present in the air , gets scattered as the light falls on the dust particles , and hence give various colors to the sky , since , blue is the color that is scattered the most , therefore , maximum sky is blue in color .

Similarly during night time , there is no light , hence , the sky appears dark.

Answer:

N=+2

O=-2

Explanation:

The compound NO is electrically neutral.

Lets assign the oxidation number of nitrogen to be N. The oxidation number of oxygen (-2) is then used as a reference.

For the compound to have a zero charge,  sum of the oxidation numbers equals zero.

N+ (-2)=0

N=+2

O=-2

Areas with high air pressure and low humidity typically have fair and dry weather due to sinking air that discourages cloud formation and a lack of moisture that reduces precipitation likelihood.

If an area has high air pressure and low humidity, it is likely to experience fair and dry weather. High air pressure usually involves sinking air, which inhibits cloud formation and leads to clearer skies. Low humidity means there is less moisture in the air, further reducing the likelihood of precipitation. Without the rising, condensing air masses characteristic of low-pressure systems, which produce clouds and precipitation, an area with high pressure and low humidity tends to have stable and pleasant weather.

Answer:

The substance that dissolves

Explanation:

Solute is the substance that disappears into a liquid. For example,when salt dissolves in water,the salt is the solute because it is the substance that saluted.

Answer:

What is a solute?

The answer is C. The substance that gets dissolved.

What is a solvent?

The answer is C. The substance

that dissolves the solute.

Explanation:

Answer: i belive its 55

Explanation:tyy