1. Use your knowledge of valence electrons and how they affect bonds to figure out how carbon (Group 14) and oxygen (Group 16) would be attached to one another. In carbon dioxide (CO2), how is the compound structured? (Use “–” to represent a single bond and “=” to represent a double bond.)(1 point)

A) O=C–O

B) O=C=O

C) C=O–O

D) C–O–O

2. Methane’s chemical formula is CH4. Is there a bond between any of the hydrogen atoms? Why or why not?(1 point)

A) Yes, there is because they form a long chain in order to all have stable outer energy shells.

B) Yes, there is because there are one too many hydrogen atoms for carbon to handle alone, so one hydrogen must bond with another.

C) No, there is not because carbon needs four bonds, so it bonds with each hydrogen atom; hydrogen only forms one bond.

D) No, there is not because it would form H2 instead of methane if hydrogen-bonded with itself.

3. In hydrogen peroxide (H2O2), which option best shows how the atoms are ordered?(1 point)

A) H–O–O–H

B) O–H–O–H

C) H–O–H–O

D) O–H–H–O

A bigger atom  fission when a neutron smashes against it, causing it to excite and split into two smaller atoms known as fission products. A chain reaction may be initiated by other neutrons that are also released.

By dissolving large, heavy atoms, like uranium, into smaller ones, like iodine, cesium, strontium, xenon, and barium, to name just a few, fission produces energy. To create the heavier helium, fusion combines light atoms, such as the two hydrogen isotopes deuterium and tritium.

Nuclear fission fuels the explosion of nuclear weapons and creates energy for nuclear power. Due to the fact that certain compounds known as nuclear fuels undergo fission when impacted by fission neutrons and then break apart, both uses are feasible.

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Systematic name : 5-chloro-2-pentanol (or 5-chloropentan-2-ol)

Systematic name : 1,2-difluoro-3-heptanol   (or 1,2-difluoroheptan-3-ol).

The active site of numerous reactions is the hydroxyl group (OH). Pentyl butyrate, which has an apricot-like aroma, is the ester that results from the reaction of 1-pentanol and butyric acid. Amyl acetate, also known as pentyl acetate, is the ester that is created when 1-pentanol and acetic acid are combined.

A research evaluating the efficacy of diesel fuel blends with different amounts of pentanol as an additive was done in 2014. Higher pentanol concentrations resulted in higher gaseous emissions at the expense of lower particulate emissions.

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Answer:

The correct answer is Science is objective, whereas pseudoscience is subjective. Pseudoscience includes beliefs, theories, or practices that have been or are considered scientific, but have no basis in scientific fact. This could mean they were disproved scientifically, can't be tested or lack evidence to support them.

Explanation:

hope its help

thank you

Explanation:

There are some options that are correct.

1) Amount of limiting reactant used in a reaction.

It can be calculated from the quantity of the reactants.

------

2) Amount of excess reactant from a reaction

It can be also calculated from the quantity of the reactants.

------

3) Theoretical yield of products

Answer:

Amount of limiting reactant used in a reaction

Amount of excess reactant from a reaction

Theoretical yield of products

Answer:

Chemical to electrical to mechanical

Explanation:

The energy conversion going on in a battery - powered toy car is from chemical to electrical and then to mechanical energy.

According to the law of conservation of energy, energy is neither created nor destroyed but transformed from one form to another.

1. Oxygen is a reactant needed for all combustion reactions.

2. The products of the complete combustion reaction of a hydrocarbon (compound containing carbon and hydrogen) are carbon dioxide and water.

3. Complete combustion takes place if the quantity of oxygen is sufficient.

4. Incomplete combustion takes place if the quantity of oxygen is insufficient.

5. Combustion is a exothermic change.

6. In a combustion reaction, oxygen is the oxidizer and the substance which burns is the fuel.

7. The lower the kindling temperature, the easier is the combustion.

8. If a substance burns at room temperature in the absence of a flame the combustion is said to be spontaneous.

9. Combustion reactions are accompanied by heat and light effect.

10. Combustion reactions don't take place at the same rate.

1)Oxygen is a reactant needed for all combustion reactions. Combustion reactions are chemical reactions that involve the rapid combination of a fuel (usually a hydrocarbon) with oxygen gas. Oxygen acts as the oxidizing agent, providing the necessary component for the reaction to occur. Without oxygen, combustion cannot take place.

2)The products of the complete combustion reaction of a hydrocarbon are carbon dioxide and water. In the presence of sufficient oxygen, hydrocarbons undergo complete combustion, resulting in the production of carbon dioxide (\(CO_2\)) and water (\(H_2O\)). This reaction releases a significant amount of energy in the form of heat and light.

3)Complete combustion takes place if the quantity of oxygen is sufficient. Complete combustion occurs when there is an adequate supply of oxygen available for the reaction. In this case, the fuel (hydrocarbon) reacts completely with oxygen, resulting in the formation of carbon dioxide and water as the only products

4)Incomplete combustion takes place if the quantity of oxygen is limited. In situations where there is insufficient oxygen available, incomplete combustion occurs. This leads to the formation of products such as carbon monoxide (CO) and carbon (soot) in addition to carbon dioxide and water. Incomplete combustion is less efficient and can release harmful pollutants into the environment.

5)Combustion is a chemical change. Combustion is classified as a chemical change because it involves the breaking and forming of chemical bonds between atoms and molecules. The reactants (fuel and oxygen) undergo a chemical reaction to produce new substances (products) with different properties, such as carbon dioxide and water. Heat and light are also typically released during combustion.

6)In a combustion reaction, oxygen is the oxidizer, and the substance that burns is the fuel or combustible material. Oxygen acts as the oxidizing agent, meaning it accepts electrons from the fuel, leading to the oxidation (burning) of the fuel. The fuel provides the carbon and hydrogen atoms that combine with oxygen to form carbon dioxide and water.

7)The lower the kindling temperature, the easier the combustion. The kindling temperature is the minimum temperature at which a substance can ignite and sustain combustion. If the kindling temperature is lower, it means that less heat is required to initiate the combustion process. Substances with lower kindling temperatures are more prone to catching fire and sustaining combustion.

8)If a substance burns at room temperature in the absence of a flame, the combustion is said to be spontaneous. Spontaneous combustion refers to the ignition and burning of a substance without the need for an external ignition source, such as a flame. It occurs when certain materials, under specific conditions, undergo self-heating and eventually reach their ignition temperature, leading to combustion.

9)Combustion reactions are accompanied by heat and light effects. Combustion reactions are highly exothermic, meaning they release a significant amount of heat energy. This energy is released in the form of heat and light, resulting in flames or glowing embers during combustion.

10)Combustion reactions don't take place at the same rate for all substances. The rate of combustion can vary depending on factors such as the nature of the fuel, the availability of oxygen, temperature, and pressure. Different substances have different combustion rates due to variations in their chemical properties and reactivity.

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Answer:

for 1 solid its freezing.

for 2 solid and liquid its melting

for 6 liquid to gas its evaporation and for 5 gas  to liquid its condensation.

Explanation:

hope this helped :)

Answer:

solid->liquid= melting

liquid->solid= freezing

gas->liquid= consendation

liquid->gas= evaporation

According to the question for a solution with a pH of 2.68, [H+] = 10-2.68 = 0.00145 M.

pH is a measure of the acidity or alkalinity of a solution. It is measured on a scale of 0 to 14, with 0 being the most acidic, 7 being neutral, and 14 being the most alkaline. The pH of a solution is determined by the amount of hydrogen ions present in the solution. Solutions with a higher concentration of hydrogen ions are more acidic, while solutions with a lower concentration of hydrogen ions are more alkaline. pH is an important factor in determining the solubility of substances, as well as the rate of chemical reactions. It is also important in controlling the growth of microorganisms, as some organisms require a certain pH to survive.

The [H+] concentration can be determined by using the pH equation, which states that pH = -log[H+]. Rearranging this equation to solve for [H+], we get [H+] = 10-pH.
Therefore, for a solution with a pH of 2.68, [H+] = 10-2.68 = 0.00145 M.

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Answer:

10-4mol/l

[H+]=10-7 , which we call a pH of 7.

This means, for example, that a hydrogen-ion concentration of a solution with a pH of 4 is 10-4mol/l, meaning it contains 0.0001 mol of hydrogen ions in a solution of 1 liter.

Explanation:

3.12×10⁻¹⁰M is the concentration of OH⁻ ions. Concentration in chemistry refers to the quantity of a material in a certain area.

Concentration in chemistry refers to the quantity of a material in a certain area. The ratio of the solvent in the solution to the solvent or whole solution is another way to define concentration. In order to express concentration, mass every unit volume is typically used. The solute concentration can, however, alternatively be stated in moles or volumetric units.

If a formula describing a shape's boundary is known, it is possible to use integral calculus to determine the volumes of more complex shapes. No object in the dimensions of zero, one, or two has volume; in the dimensions of four and above, the hypervolume is a concept similar to the standard volume.

[H⁺] [OH⁻] = 10 ⁻¹⁴

3.16 x 10⁻⁴ × [OH⁻] = 10 ⁻¹⁴

[OH⁻] = 3.12×10⁻¹⁰M

Therefore,  3.12×10⁻¹⁰M is the concentration of OH⁻ ions.

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0.595 moles of water can be made at 112.6 grams of \(HNO_{3}\) are consumed

To determine the number of moles of water produced when 112.6 grams of \(HNO_{3}\) are consumed, we use the equation's stoichiometry and molar masses.

To determine the number of moles of water produced when 112.6 grams of \(HNO_{3}\) are consumed, we need to use the molar mass of \(HNO_{3}\) and the stoichiometric coefficients of the balanced chemical equation.

The molar mass of \(HNO_{3}\) is calculated as follows:

1 mole of hydrogen (H) = 1 g/mol

1 mole of nitrogen (N) = 14 g/mol

3 moles of oxygen (O) = 3 × 16 g/mol = 48 g/mol

Adding these together, the molar mass of \(HNO_{3}\) is 1 + 14 + 48 = 63 g/mol.

Now, we can set up a conversion factor using the stoichiometry of the balanced equation:

From the equation: 5 + 6 \(HNO_{3}\) -> \(H_{2}SO_{4}\) + 6 \(NO_{2}\) + 2 \(H_{2}O\)

From the coefficients: 6 moles of \(HNO_{3}\) produce 2 moles of \(H_{2}O\)

To find the moles of water produced, we use the following calculation:

112.6 g \(HNO_{3}\) × (1 mol \(H_{2}O\) / 63 g \(HNO_{3}\)) × (2 mol \(H_{2}O\) / 6 mol \(HNO_{3}\)) = 0.595 mol \(H_{2}O\)

Therefore, when 112.6 grams of \(HNO_{3}\) are consumed, approximately 0.595 moles of water can be produced according to the given balanced equation and molar masses.

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Answer:

=4.16×10^23Newton

Explanation:

By using formula,

F= GMm/d^2

Answer:

speed of light = 299,000,000 m/s

Explanation:

The speed of light in vacuum, denoted as c,  is a universal physical constant which unlike space and time, is independent of the observer. It is a constant that is important in many fields of science. Its exact value is given as 299,792,458 metres per second.

In scientific notation, it is approximately given as 2.99 x 10⁸ metres per second.

2.99 x 10⁸ metres per second = 2.99  x 100000000 = 299,000,000 m/s

Therefore, when expressed in decimal notation, the speed of light = 299,000,000 m/s.

Answer:

The nuclide formed by the β decay of 26Al is 26Mg.


Mark my answer as brainliest! this was a difficult one

Because White sugar settles at the bottom of iodized salt. White sugar completely mixed with iodized salt.

The bond lengths that would have the strongest bond is option  C:174 pm

The link gets shorter every time two nuclei are drawn closer together to form a stronger bond. The nuclei are drawn closer to one another by the coulombic attraction on the bonding electrons, resulting in a shorter bond.

Therefore, In addition, the interaction and bond strength increase in proportion to how much they pull apart. This also perfectly suits with bond orders. In comparison to a single bond between the same two atoms, a double bond is both stronger and shorter and it smaller number than bigger numbers.

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Batteries, natural gas, and coal are all chemical energy

Answer: The reaction rate will DECREASE.

Explanation:

Chemical reaction occurs through the combination of chemical reactants to form new products. The rate if this reaction is affected by the following factors:

- the chemical nature of the reacting substances,

- the state of subdivision (one large lump versus many small particles) of the reactants,

- the temperature of the reactants,

- the concentration of the reactants, and

- the presence of a catalyst.

When additional liter of pure water is added to the reaction mixture, collision between reactant molecules is reduced The dilution causes the concentration of the reactants to reduce. This in turn affects the rate of chemical reactions as the decreased concentration of reactants leads to a decrease in the reaction rate.

The chemical formula of aspartame is C₁₄H₁₈N₂O₅ and it's relative molecular mass is 294.30 g/mol which is calculated as (12×14)+(1×18)+(14×2)+(16×5).

Molecular  mass of a compound or a molecule is defined as the mass of the elements which are present in it.The molecular mass is considered to be a bulk quantity not a molecular quantity. It is often an average of the of the masses at many instances.

The molar mass and formula mass are used as synonym for the molecular mass.It does not depend on the amount of substance which is present in the sample.It has units of gram/mole.

Molecular masses of an element are given as relative atomic masses while that of compounds is the sum of relative atomic masses which are present in the compound.In case of aspartame it is calculated as,(12×14)+(1×18)+(14×2)+(16×5)=294.30 g/mol.

Thus , relative molecular mass or molecular mass of aspartame is 294.30 g/mol.

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Pyruvate is a byproduct of glycolysis.The oxidative deacetylation of pyruvate to produce carbon dioxide and acetyl CoA is catalyzed by the multienzyme complex dopamine dehydrogenase complex (PDH complex).Pyruvate + CoA + NAD+ ----> Acetate CoA + NADH + H++ CO2. Acetyl CoA ———- Citric Acid Cycle is the general equation for the reaction.

Coenzyme A is joined with the oxidized two-carbon acetyl group to generate acetyl CoA.

The pyruvate dehydrogenase (PDH) enzyme, which is a component of the multienzyme PDC and is frequently described to as a "gatekeeper" in the oxidation of carbohydrates, catalyzes the physiologically irreversible conversion of pyruvate to acetyl-CoA.

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Answer: The element having number of protons 120 will belong to Group 2, Period 8 and has an atomic number of 120.

Explanation:

We are given:

Number of protons = 120

Atomic number is equal to the number of protons present in neutral atom.

Atomic number of element = 120

Electronic configuration of element: \(1s^22s^22p^63s^23p^64s^23d^{10}4p^65s^24d^{10}5p^66s^24f^{14}5d^{10}6p^67s^25f^{14}6d^{10}7p^68s^2\)

Electronic configuration of element in terms of noble gas: \([Og]8s^2\)

As, the last electron is entering in s-orbital. So, it is an s-block element and there are 2 electrons in the outermost shell. So, it will belong to Group-2.

And, the value of Principal Quantum number (n) for this element is '8'. Therefor, it will belong to Period 8.

Hence, the element having number of protons 120 will belong to Group 2, Period 8 and has an atomic number of 120.

In redox reactions, an oxidation half reaction shows the oxusetoon occurring while the reduction half reaction shows the reduction occurring in the overall reaction.

Redox reactions are reactions in which oxidation and reduction reactions occur together to the same extent.

A redox reaction can be split into two half oxidation and reduction reactions.

The half reactions of the given reactions are shown below:

Overall reaction;

\(A. Mg(s) + CoBr_2(aq) ⟶ MgBr_2(aq) + Co(s) \\ \)

Oxidation half reaction:

\(Mg (s) ---> Mg ^{2+}(aq)\)

Reduction half reaction:

\(Co^{2+} (aq) ---> Co (s)\)

B. Overall reaction

\(Cu(s) + 2AuCl(aq) ⟶ CuCl_2(aq) + 2Au(s) \\ \)

Oxidation half reaction:

\(Cu(s) ---> Cu^{2+}(aq)\)

Reduction half reaction:

\(2Au^{+}(aq) ---> 2 Au (s)\)

Therefore, redox equations can be spilt into oxidation and reduction half reactions.

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Answer:

Normal boiling point is a standard boiling point at sea level highet that is 100 c°

but the temperature at which water boils may vary with different factors like increasing pressure in pressure cooker.

And it decreases with increase in height.

Explanation:

The boiling point of a liquid is the temperature at which its vapor pressure is equal to the pressure of the gas above it. The normal boiling point of a liquid is the temperature at which its vapor pressure is equal to one atmosphere (760 torr).

Normal boiling point is a standard unit  and the highest is 100 c°  at sea level but the temperature at which water boils and the temperature may vary with respect to different factors.  

The boiling point is defined as the temperature at which the liquid vapor pressure is equal to the external pressure surrounding the liquid.

The boiling point of a liquid depend on atmospheric pressure.

When external pressure is reduced, the boiling point will be lowered. For example at sea level the boiling point of water is 100 C  but when we go to 6,600 feet the boiling point become 93.4 C

The standard boiling point is defines  as the temperature of boiling under 1 bar of pressure.

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The descending order of the strength of the conjugate bases of the given acids is as follows:

Conjugate bases are substances formed when an acid donates its proton.

The strength of the conjugate bases formed from an acid is the inverse of the acid dissociation constant, Ka, of the acid.

The acid dissociation constant, Ka, of the given acid are given below:

The acid dissociation constant, Ka, of hypobromous acid, HBrO, is 2.3 * 10⁻⁹

The acid dissociation constant, Ka, of trioxonitrate (v) acid, HNO₃ is 2.4 * 10¹

The acid dissociation constant, Ka, of water, H₂O, is 1.8 x 10⁻¹⁶

The acid dissociation constant, Ka, of Hypochlorous acid, HClO, is 3.0 x 10⁻⁸

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A vessel of 14.0 L would hold 1.78 moles of chlorine gas at 120.0 °C and 33.3 atm.

The ideal gas law relates the pressure (P), volume (V), temperature (T), and the number of moles (n) of a gas to a constant R known as the universal gas constant. In this equation, P, V, and T are directly proportional to n, which means that as the number of moles of gas increases, so does the pressure, volume, and temperature.

Using the ideal gas law, PV = nRT, we can solve for the number of moles of chlorine gas:

n = PV/RT

First, we need to convert the temperature to Kelvin by adding 273.15:

T = 120.0 + 273.15 = 393.15 K

Next, we can plug in the values we have:

n = (33.3 atm)(14.0 L)/(0.0821 L•atm/mol•K)(393.15 K)

n = 1.78 moles

Therefore, 1.78 moles of chlorine gas at 120.0 °C and 33.3 atm would occupy a vessel of 14.0 L.

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Answer:

Carbon is stored on our planet in the following major sinks (1) as organic molecules in living and dead organisms found in the biosphere; (2) as the gas carbon dioxide in the atmosphere; (3) as organic matter in soils; (4) in the lithosphere as fossil fuels and sedimentary rock deposits such as limestone, dolomite

Alkali metals require least amount of ionization energy.

Peaky Blinder fan? haha

Answer:

I’m going with her it c

Explanation:

Answer:

it maybe C

Explanation:

The concentration of the hydrogen carbonate ion ([HCO₃⁻]) is approximately 3.15 x 10⁷ and the concentration of the carbonic acid ([H₂CO₃]) is approximately 2.52 x 10⁷.

The carbonate buffer system plays a crucial role in maintaining the pH balance of the extracellular environment. In this system, carbonic acid (H₂CO₃) and hydrogen carbonate (HCO₃⁻) act as a conjugate acid-base pair. Given that the ratio of carbonic acid to hydrogen carbonate is 1.25:1, we can assume that the initial concentration of carbonic acid is higher. Let's denote the initial concentration of carbonic acid as [H₂CO₃] and the concentration of hydrogen carbonate as [HCO₃⁻]. The dissociation of carbonic acid can be represented by the equation: H₂CO₃ ⇌ H⁺ + HCO₃⁻. The equilibrium constant (Ka) for this reaction is given as 4.5 x 10⁻⁷. At physiological pH (7.35), the concentration of H⁺ is determined by the dissociation of carbonic acid and is tightly regulated. To calculate the concentration of hydrogen carbonate ion ([HCO₃⁻]), we need to make use of the Henderson-Hasselbalch equation:

pH = pKa + log([HCO₃⁻]/[H₂CO₃])

Substituting the given values, we have:

7.35 = -log(4.5 x 10⁻⁷) + log([HCO₃⁻]/[H₂CO₃])

Rearranging the equation, we find:

log([HCO₃⁻]/[H₂CO₃]) = 7.35 + log(4.5 x 10⁻⁷)

Taking antilog of both sides, we get:

[HCO₃⁻]/[H₂CO₃] = 10^(7.35 + log(4.5 x 10⁻⁷))

Simplifying the right-hand side, we have:

[HCO₃⁻]/[H₂CO₃] ≈ 3.15 x 10⁷

Since the initial ratio of H₂CO₃ to HCO₃⁻ is 1.25:1, we can set up the equation:

[HCO₃⁻] = 1.25 x [H₂CO₃]

Substituting the value of [HCO₃⁻]/[H₂CO₃] from above, we find:

1.25 x [H₂CO₃] = 3.15 x 10⁷

Solving for [H₂CO₃], we get:

[H₂CO₃] ≈ 2.52 x 10⁷

Therefore, the concentration of the hydrogen carbonate ion ([HCO₃⁻]) is approximately 3.15 x 10⁷ and the concentration of the carbonic acid ([H₂CO₃]) is approximately 2.52 x 10⁷.

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Answer:

How many grams of K2Cr2O7, are soluble in 100 g of water at 95 ºC? Solubility Curve DRAFT. 10th - 12th grade. 3326 times. Chemistry. 63% average accuracy. 3 years ago ... When 20 grams of potassium chlorate, KClO 3, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as: answer choices . supersaturated. saturated.

Explanation: