Does sodium and oxygen form an ionic compound?.

Answers

Answer 1

The fact that sodium will combine with oxygen to generate an ionic molecule indicates that this will happen.

How can you tell if a substance is ionic?

As a general rule, ionic bonding can be seen in compounds where a metal bonds with a non-metal or a semi-metal. Molecular compounds are those that are made entirely of non-metallic elements or semi-metallic elements combined with non-metallic elements and exhibit covalent bonding.

What distinguishes ions from covalent bonds?

When a metals reacts with a nonmetal, ionic compounds are typically created (or a polyatomic ion). When two nonmetals interact, covalent compounds are created. Due to the fact that gas is a nonmetal, binaries compounds hydrogen are typically covalent compounds as well.

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Related Questions

A 10.0 ml syringe contains 0.10 g of nitrogen gas at 0.0 degrees celsius. what is the pressure inside the syringe? 8.0 atm 0.80 atm 224 atm 0.22 atm

Answers

Option -( A ) 8.0 atm. The pressure of the syringe containing 0.10 g of nitrogen gas at 0.0 degrees Celsius is 8.0 atm. .

The ideal gas equation is a equation of state of a hypothetical ideal gas. It is expressed as,

                  PV = n RT

 where, P is the  Pressure - Unit: (kPa or Pa)

              V is the Volume - Unit: (L)

              n is Number of Moles - Unit: (mole)

             R is Universal Gas Constant - Unit: (8.31 L• kPa/ mole• K)

             T is Temperature - Unit: (K)

The ideal gas law states that the product of the pressure and the volume of one gram molecule of an ideal gas is equal to the product of the absolute temperature of the gas and the universal gas constant. It is used as a prediction of the behavior of many gases, when subjected to different conditions. A 10.0 ml syringe contains 0.10 g of nitrogen gas at 0.0 degree Celsius.

    n = m /MM

        = 0.10 / 28 = 0.0036 mole

P = n RT / V

   = 0.0036(0.08206)(273.15) / 0.010

P = 8 atm.

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elect all the statements that correctly describe the bonding and geometry in the polyatomic ion SeCl5-.
The molecular geometry is square pyramidal.
There are 6 electron domains around the central atom.
There is one lone pair on the central atom.

Answers

As stated in the preceding statement Square pyramidal geometry describes the molecules.

An atom is what?

An atom is made up of a core nucleus and one or maybe more electrons with negative charge that orbit it. The positively charged, comparatively hefty protons and neutrons that make up the nucleus may be present.

What are an example and an atom?

The quantity of protons an atom has makes it distinct from other atoms. Consequently, a particle devoid of protons isn't just an atom. But even a single proton constitutes every atom (of hydrogen). Individual particles of something like the periodic table elements like sodium, plutonium, argon, among chlorine are examples of atoms.

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A student decides to conduct an investigation to determine the boiling points of water and ethanol. The student will heat samples of water and ethanol, and measure the temperature at which the samples boil. The student will conduct the investigation three times. Which aspect is missing from the experimental design?(1 point).

Answers

Answer: deciding on the appropriate equipment

the entropy of an isolated system . the entropy of an isolated system . remains constant. either decreases or remains constant. always decreases. always increases. either increases or remains constant.

Answers

The entropy of an isolated system is constantly increasing.

An isolated system is defined in thermodynamics as a system that does not allow the exchange of energy and mass between the system and the environment.

Entropy is a measure of system disorder and is a function of state. In other words, it depends only on the state of the system.

In a real thermodynamic process, the entropy of an isolated system only increases because the system cannot exchange energy or mass, but it creates randomness in the molecules in the system and increases the entropy until it reaches an equilibrium point. increase. Arrival point

Therefore the entropy of an isolated system always increases.

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Which elements are likely to form negative ions?.

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Generally, non-metals are likely to form negative ions. Non-metals come to the right-hand side of the periodic table.

As we add electrons to the same valence shell and also add protons to the nucleus, atoms in general undergo a contraction in atomic radius, with the smallest atoms to the right of the Periodic Table. And thus elements to the right side of the Periodic Table, like fluorine, chlorine, and oxygen, tend to be oxidizing, i.e. they accept electron density as a consequence of their unshielded nuclear charge.

And so nitrogen, oxygen, fluorine, chlorine, etc. tend to form negative ions. The parent atoms are oxidizing species.

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calculate the total concentration, in molarity, of hydroxide ions when 1,186.8 milligrams of gold(iii) hydroxide are completely dissolved into 0.154 l of 1.76 x10-1 m naoh. assume the added solute does not contribute significantly to the total volume. Report your answer to three significant digits.

Answers

The correct answer is 0.292 M.

Molarity or molar concentration is the number of moles of solute per liter of solution or molarity can be defined to be as number of moles of solute in volume of solution.

Mass of Gold(III) hydroxide = 1.1868 g

Moles of gold(III) hydroxide = mass of Au(OH)₃ / Molar mass of Au(OH)₃

Moles of Gold(III) = 1.1868/247.98 = 0. 004 moles

Moles of hydroxide ion from  Au(OH)₃ will be,

Au(OH)₃ ⇔ Au³⁺ + OH⁻

Here,

if 1 mole of  Au(OH)₃ gives 3 moles of OH⁻ ion then,

0.006 moles of  Au(OH)₃ will give,

 = 3 x 0.006 moles of OH⁻ ions

 = 0.018 moles of OH⁻ ions

Again,

NaOH ⇔Na⁺ + OH⁻

Since, [OH⁻] = [NaOH] = 1.76 x 10⁻¹ = 0.176 M = molarity.

Hence, the moles of OH⁻ = Molarity of OH⁻ x VH of OH⁻

                                      = 0.176 M x 0.154L

                                      = 0.0271 moles

Now, total moles of OH⁻ will be

= OH⁻ from  Au(OH)₃ + OH⁻ from NaOH

= (0.018 + 0.0271) moles

= 0.0451 moles of OH⁻

To find the concentration of hydroxide ion, we need to just apply the formula of molarity:

[OH⁻] = moles of OH⁻ / Volume of the solution

         = 0.0451 / 0.154

         = 0.292 M

Therefore, the the total concentration of hydroxide ion, in molarity is 0.292 M.

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Does oxygen and potassium form an ionic compound?.

Answers

Potassium oxide is simply an ionic mixture of potassium and oxygen. The base is it. This pale yellow solid is potassium oxide at its most basic. It is true that it is a rarely used, highly reactive substance.

What distinguishes an ionic compound?

As a general rule, ionic bonding can be seen in compounds where a metal bonds with a non-metal or just a semi-metal. Molecular compounds are those that are made entirely of non-metallic elements or semi-metallic elements combined with non-metallic elements and exhibit covalent bonding.

Ionic bonds: what makes them?

The full transfer of a few electrons of one atom to the another creates an ionic connection. As soon as an atom loses one or more electrons, it changes into a cation, a positive charges ion. When an atom gains one or more electrons, it changes into a negatively charged ion called an anion.

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Now consider the difference in the types of charges formed by na and cl. What is the charge of the ions formed by na and by cl?.

Answers

The ions formed by Na and by Cl is Na forms a +1 ion, and Cl forms a -1 ion.

What is ions?
An molecule or atom with such a net electrical current is known as an ion. Conventionally, the charge of the an electron is thought to be negative; this charge is equal to and opposite to a charge of the a proton, which would be thought to be positive. Because the total amount of electrons in an ion is greater than the total number of protons, the net charge of the an ion is not zero. A negatively charged ion called an anion has more protons than electrons compared to a chloride ion called a cation. Electrostatic force causes opposite electric charges to be drawn towards one another, causing cations and anions to attract one another and easily form ionic compounds.

Na forms a +1 ion, and Cl forms a -1 ion.
This is because Na has one valence electron and Cl has 7 valence electrons.
When Na loses its valence electron it becomes a +1 ion, and when Cl gains one more electron it becomes a -1 ion.
This is due to the fact that Na has a lower electronegativity than Cl, and thus is more likely to lose an electron in a chemical reaction.

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What is the charge of an atom if it loses 3 electrons?.

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Answer:
If an atom loses 3 electrons, it will gain a charge of +3.

Explanation:
Electrons are negatively charged. So, if an atom loses electrons, they lose the negative charges, thus becoming more positive. Depending on the atom’s current charge, you would add 3 to it to determine its final charge after losing 3 electrons.

21. what volume of 0.128 m hcl is required to neutralize 2.87 g of mg(oh)2? (write a balanced equation for the neutralization reaction first.)

Answers

0.769 dm³ volume of 0.128 M HCl is needed to neutralize 2.87 g of Mg(OH)₂ is required.

The balanced chemical equation for the reaction between HCl and Mg(OH)₂

2HCl + Mg(OH)₂ → MgCl₂ + 2H₂O

This means 2 moles of HCl is required to neutralize 1 mole of Mg(OH)₂.

First, we will determine the number of moles present in 2.87 g of Mg(OH)₂

Molar mass of Mg(OH)₂ = 58.3197 g/mol

Mass = 2.87 g

From the formula,

number of moles= mass/molar mass

                             =0.04921 moles

Since 2 moles of HCl is required to neutralize 1 mole of Mg(OH)₂

Then, 2 × 0.04921 moles of HCl will be required to neutralize 0.04921 moles of Mg(OH)₂

Number of moles of HCl required to neutralize the Mg(OH)₂ = 2 × 0.04921 moles

= 0.09842 moles

0.09842 moles of HCl is required to neutralize the Mg(OH)₂

Now, we will determine this in volume

Concentration of the HCl = 0.128 M

Number of moles = 0.09842 moles

From the formula, Number of moles = Concentration × Volume

Volume = Number of moles ÷ Concentration

Volume = 0.09842 moles ÷ 0.128 M

Volume = 0.76890625 dm³

              = 0.769 dm³

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What is the function of the thick albumen in an egg?.

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The function of the thick albumen in an egg is it provides the liquid medium to which the embryo develops. it serve to keep yolk in center.

The albumen consist of the 4 layers that thick and in thin consistencies. the yolk outward, they are designated. the thinner thick layer is chalaziferous white. the albumen provide the liquid  medium  in which the embryo develops it contains the large amount of the protein that is very necessary for the proper development in the egg. the fresh egg contain white cords attached to the yolk sac.

Egg albumen contains essential amino acids and full of protein.

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what volume of a 0.189 m sodium hydroxide solution is required to neutralize 13.8 ml of a 0.171 m perchloric acid solution?

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Volume of a 0.189 m sodium hydroxide solution is required to neutralize 13.8 ml of a 0.171 m perchloric acid solution is 80.42 L.

The balance chemical equation is given :

NaOH  +   HClO₄   ----->   NaClO₄   +   H₂O

given that :

molarity = 0.171 M

volume = 13.8 mL = 0.0138 L

moles of HClO₄ = molarity × volumes in L

                          = 0.171 × 0.0138

                          =  0.0023 mol

moles of  HClO₄ = moles of NaOH

moles of NaOH = 0.0023 mol

volumes of NaOH = molarity / moles

                              = 0.189 / 0.00235

                              = 80.42 L

The volume of sodium hydroxide = 80.42 L.

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What are 4 polygenic traits?.

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In humans, height, skin color, hair color, and eye color are examples of polygenic traits.

A polygene is a member of a collection of non-epistatic genes that interact additively to steer a phenotypic trait, consequently contributing to more than one-gene inheritance, a sort of non-Mendelian inheritance, in preference to unmarried-gene inheritance, which is the core belief of Mendelian inheritance.

A polygenic trait is a feature, which includes height or skin coloration, that is encouraged by way of or extra genes. because a couple of genes are concerned, polygenic developments do not comply with the styles of Mendelian inheritance. Many polygenic traits are also stimulated by means of the environment and are called multifactorial.

Most inherited trends in animals are polygenic. a few examples are: conformation, kind, size, sturdiness, disorder resistance, temperament, velocity, milk and egg production, growth fee, maturation and sexual adulthood rate, and numerous inherited diseases.

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Consider the reaction 2al 6hbr → 2albr3 3h2. if 8 moles of al react with 8 moles of hbr, what is the limiting reactant?

Answers

Answer: HBr

Explanation:

The limiting reactant in the reaction is HBr.

Limiting reactant is the defined as the reactant which determines the maximum amount of product(s) that will be formed. As when it's all used up, the reaction stops and cannot proceed further, since the other reactant doesn't have anything to react with.

The limiting reactant provides the information about the amount of the products formed, as opposed to the reactant in excess which doesn't provide any valuable information.

The given reaction is already balanced. Hence, it gives us the information that 2 moles of Al requires 6 moles of HBr.

2Al + 6HBr ⇒ 2AlBr₃ + 3H₂

If 8 moles of Al will be reacted, it will require 24 moles of HBr, but we only have 8 moles of HBr.

On the other hand, if 8 moles of HBr will be reacted, it will only require 8/3 moles of Al which will leave excess Al unreacted. Reacting 8 moles of HBr with 8 moles of Al will produce 8/3 moles AlBr₃ and 4 moles H₂.

Hence, the limiting reactant is HBr.

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observe: some chemical reactions release heat, and others absorb heat. in an exothermic reaction, heat is released and the temperature of the system rises. in an endothermic reaction, heat is absorbed and the temperature of the system decreases. to remember: exo-thermic

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The statement ' some chemical reactions release heat, and others absorb heat. In an exothermic reaction, heat is released and the temperature of the system rises. In an endothermic reaction, heat is absorbed and the temperature of the system decreases' is true.

In the field of science, an exothermic reaction can be described as such a reaction in which heat is released. On the other hand, an endothermic reaction is such a reaction in which heat is absorbed from the environment.

As heat is released into the atmosphere, the temperature will rise for an exothermic reaction. On the other hand, as heat is taken, the temperature of the surrounding atmosphere will lower for an endothermic reaction.

The question will correctly be written as:

observe: some chemical reactions release heat, and others absorb heat. in an exothermic reaction, heat is released and the temperature of the system rises. in an endothermic reaction, heat is absorbed and the temperature of the system decreases. Is the observation true or false?

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Manganese metal can be prepared by the thermite process:


4Al(s)

+

3MnO2(s)


3Mn(l)

+

2Al2O3(s)


If 175 g of Al and 472 g of MnO2 are mixed, how many moles of Mn could be produced from the reaction?

Relative Atomic Mass Data: Ca = 40; Mn = 55; I = 127; Li = 7; Ag = 108; Al = 27; Na = 23; H = 1; K = 39; Br = 80; N =14; O =16; Cl = 35

Answers

Manganese metal can be prepared by the thermite process as it is the limiting reactant.

What is the balanced equation for the reaction?

The balanced equation for the reaction. This is given below:

[tex]4Al(s) + 3MnO2(s) — > 3Mn(l) + 2Al2O3(s)[/tex]

Determination of the masses of [tex]Al[/tex] and [tex]MnO2[/tex] that reacted from the balanced equation. This is illustrated below:

Molar Mass of Al = 26.98g/mol

Mass of Al from the balanced equation = 4 x 26.98 = 107.92g

Molar Mass of MnO2 = 86.94g/mol

Mass of [tex]MnO2[/tex] from the balanced equation = 3 x 86.94 = 260.82g

From the balanced equation above,

107.92g of Al reacted with 260.82g of MnO2 reacted.

Determination of the limiting reactant. This is illustrated below:

Let us consider using all the 203g of Al given to verify if there will be any leftover for [tex]MnO2.[/tex] This is illustrated below:

From the balanced equation above,

107.92g of Al reacted with 260.82g of MnO2,

Therefore, 203 g of Al will react with = (203 x 260.82)/107.92 = 490.61g of [tex]MnO2.[/tex]

Therefore, Manganese metal can be prepared by the thermite process as it is the limiting reactant.

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a pure sodium rystal 100g sits inn a steel cup. one drop watre is added. hydrogen gas is produced. what else happens. explain as

Answers

The reaction is: Na + H20 --> [tex]\frac{1}{2}[/tex]H2 + NaoH

ΔHr = (-1)(-285.84)+1(-425.9)

        =-140KJ/gmol

1ml water = 1g water = 0.056gmol . 100gNa = 4.35gmoles

If water reacts, about 4.35 - 0.056 = 4.29gmol

or about 98.7g of Na remain.

The heat capacity of Na is 28J/gmol°C

The energy blance is :

(-140) × 0.056 + (4.29) × 28 ××ΔT=0

ΔT = 65°C

The heat is released up on reaction is sufficient to warm the Na metal up by about 65°C or to about 85-90°C from room temperature.This may be enough to cause the hydrogen °gas to expolde.

Hence above given is a correct answer.

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fluorine gas and water vapor react to form hydrogen fluoride gas and oxygen. what volume of hydrogen fluoride would be produced by this reaction if 3.05 ml of water were consumed? also, be sure your answer has a unit symbol, and is rounded to 3 significant digits.

Answers

Fluorine gas and water vapor react to form hydrogen fluoride gas and oxygen. The volume of hydrogen fluoride produced by a reaction if 3.05 ml of water were consumed is 6.10 ml.

The balanced reaction between fluorine gas and water vapor is

2F₂(g)+2H₂O(g)→4HF(g)+O₂(g)

To find out the volume of hydrogen fluoride produce, we need to use Avogadro's law equation which is given as

V₁/n₁=V₂/n₂

Where, V₁=3.05 ml, n₁=2, n₂=4, V₂=?

Rearrange the formula for V₂

V₂=(V₁×n₂/n₁)

Plug all the values in the formula

V₂=(3.05 ml×4/2)

V₂=12.2 ml/2

V₂=6.10 ml

Therefore, the volume of hydrogen fluoride(HF) produced by the reaction if 3.05 ml of water were consumed is 6.10 ml.

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Complete the equations to show how 1-phenylcyclopentene can be synthesized from cyclopentanol. Part 1 Select all the suitable oxidizing agents for the previous reaction. A. LiAlH4 in diethyl ether, then H2O B. PCC in CH2Cl2 C. H2 and a Pt, Pd, Ni, or Ru catalyst D. NaBH4 in CH3OH 1. H2CrO4 generated from Na2Cr2O7 in aqueous sulfuric acid

Answers

The appropriate oxidizing agents for the preceding procedure are PCC in CH2Cl2 and H2CrO4 produced from Na2Cr2O7 in aqueous sulfuric acid. demonstrating the ability to manufacture 1-phenylcyclopentene

The organic compound 1-phenylcyclopentene has the chemical formula CH3C5H9. It is a colourless, combustible liquid with a light scent. It belongs to the petroleum fraction called naphthene which is oxidizing agent. The most common way to get it is in a combination with cyclohexane. It is primarily transformed to benzene in naphthene reformers.

Since it is not exactly planar, the C6 core of 1-phenylcyclopentene has the ability to pucker and reduce structural stress. Through a chemical reaction, 1-phenylcyclopentene is created when cyclopentanol is oxidizing to yield cyclopentanone. This is the method used to make 1-phenylcyclopentene.

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ethnopharmacology is a subdiscipline in the field of ethnomedicine. identify what someone within the ethnopharmacology field might do during their res

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jot down the varieties of teas and herbs that may be found in a traditional chemical pharmacy, ask amchis what plants they use to make their medicinal products, is referred to as ethnopharmacology.

There are essentially only two parts to a traditional chemical pharmacy. A formula, which denotes the creation of a new medicinal by combining two or more ingredients, is different from a single medicinal, which refers to one specific chemicals. Ethnopharmacology focuses on the exchange of knowledge and understandings about how people use plants, fungi, animals, microbes, minerals, and their biological and pharmacological effects based on the standards established by international treaties. With the exception of vegetables and other plants used for macronutrients, herbs are a commonly used and prevalent group of plants. Is called as ethnopharmacology.

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hydration of an alkyne c6h10 gave two ketones in approximately equal amounts which of the following alkynes would be expected to give these results
3-hexyne
1-hexyne
2-hexyne
3,3-dimethyl-butyne

Answers

The alkynes would be expected to give these results is 2 - hexyne.

The alkynes are the compounds which contains carbon triple bond carbon.

The 2- hexyne undergoes hydration forms two ketones . the reaction is given as follows :

CH₃CH₂CH₂C≡CCH₃  +  H₂O  ---->CH₃CH₂CH₂C=OCH₂CH₃  +

                                                                            CH₃CH₂CH₂CH₂C=OCH₃

If the alkyne is symmetrical than the hydration product is single ketone product is formed. if the alkyne is asymmetrical than the hydration product is  formation of two ketones takes place. so the the alkynes with from two ketones according to the given ques is 2 - hexyne. the terminal alkyne form only one ketone as a product.

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How can we prevent communicable diseases Wikipedia?.

Answers

This covers preventative steps including washing your hands, cleaning, disinfecting, sterilizing, and immunizing. A healthcare setting's potential infection outbreaks are investigated, managed, and subject to surveillance.

By preventing, diagnosing, treating, minimizing, or curing disease, illness, injury, and other physical and mental impairments in humans, healthcare, often known as healthcare, aims to enhance people's overall well-being. Health care is provided by specialists in the medical area and related professions. Health care includes the practice of medicine, dentistry, pharmacy, midwifery, nursing, optometry, audiology, psychology, occupational therapy, physical therapy, sports training, and other related health professions. It encompasses work done in public health as well as in the provision of primary care, secondary care, and tertiary care.

Access to healthcare may differ between nations, groups, and people, depending on social and economic factors as well as health policy. To "employ personal health services in a timely manner to obtain the greatest potential health results," is to provide health care services.

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aqueous hydrobromic acid will react with solid sodium hydroxide to produce aqueous sodium bromide and liquid water . suppose 12.9 g of hydrobromic acid is mixed with 12. g of sodium hydroxide. calculate the minimum mass of hydrobromic acid that could be left over by the chemical reaction. be sure your answer has the correct number of significant digits.\

Answers

The diatomic molecule hydrogen bromide (HBr), when dissolved in water, produces hydrobromic acid, a potent acid. "Constant boiling" hydrobromic acid is an aqueous solution with a distillation temperature of 124.3 °C (255.7 °F) and a mass concentration of 47.6% HBr (8.77 mol/L) by mass.

The powerful acids include nitric, sulfuric, hydrobromic, hydroiodic, perchloric, and chloric acids. Hydrofluoric acid is the only weak acid that results from the reaction of hydrogen with a halogen.

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calculate the heat (q) in kj released with combustion of methanol using 790 grams of water and the change in temperature is 9.1 degree celsius. the specific heat of water is 4.18 j/(g*c). report and round your answer the an integer.

Answers

To calculate the heat released during the combustion of methanol, you will need to know the heat of combustion of methanol, which is the amount of heat released when a given amount of methanol is burned in oxygen.

The heat of combustion of methanol is -726 kJ/mol.

To find the heat released in kJ using 790 grams of water and a temperature change of 9.1 degrees Celsius,

you will need to use the formula q = m * c * deltaT, where q is the heat released, m is the mass of the substance being heated (in this case, water), c is the specific heat of the substance, and deltaT is the change in temperature.

In this case, the heat released would be:

q = 790 g * 4.18 J/(g*C) * 9.1 C = 28,903.22 J.

To convert this to kJ, you would divide by 1000 to get 28.90322 kJ. Rounded to the nearest integer, the heat released would be 29 kJ.

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Estimate the change in enthalpy and entropy when liquid ammonia at 270K is compressed from its saturation pressure of 38/ kPato 1200 Wa. For saturated liquid ammonia at 270K,Vl=1.551×10−3m3kg−1, and β=2.095×10−3K−1.

Answers

The change in enthalpy and entropy when liquid ammonia at 270 K is compressed from its saturation pressure of 381  KPa to 1200 KPa (in the question / and w are the typo mistakes) will be -2.66 × 10⁻³ KJ/Kg.K

Initial volume (V1) = 1.551 × 10⁻³ m³Kg⁻¹

     β = 2.095 × 10⁻³K⁻¹

     ΔH = CpΔT + [V-T(ΔV/ΔT)]ΔP

     ΔS = CpΔT - (ΔV/ΔT)p ΔP

For isothermal conditions

    ΔH =  [V-T(ΔV/ΔT)]p ΔP

    ΔH = V - (1 - βT) ΔP

Let V and β constant

    ΔH = V (1 - βT) ΔP

    ΔH = 1.551 × 10⁻³ m³Kg⁻¹ [1 - ( 2.095 × 10⁻³  × 270)] (1200 - 381)

   ΔH = 0.557 KJ/Kg

Now calculate dS

    ΔS = -(ΔV/ΔT)p ΔP = - βV ΔP

    ΔS = βV ΔP

    ΔS = -1.55 × 10⁻³ × 2.095 × 10⁻³ (1200 -381)

    ΔS = -2.66 × 10⁻³ KJ/Kg.K

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what is the ph of a solution prepared by mixing 100.00 ml of 0.020 m ca(oh)2 with 50.00 ml of 0.100 m naoh? assume that the volumes are additive.

Answers

12.75 is the pH of the solution prepared by mixing Ca(OH)2 and NaOH of volume 100ml and 50.00ml assuming the volumes as additive.

The solution is prepared by mixing 100.00 mL of 0.020 M Ca(OH)2 with 50.00 mL of 0.100 M naOH. The pH of a solution is a measure of hydrogen ion concentration, which in turn is a measure of its acidity. Pure water dissociates slightly into equal concentrations of hydrogen and hydroxyl (OH−) ions. For a neutral solution, [H+] is 10−7, or pH = 7. Basically, pH is defined as the negative log base 10 of the hydronium concentration. The pH is a logarithmic measure of the concentration of hydrogen ions in a solution. Because pH is on a log scale that means that increasing the pH by 1 corresponds to multiplying the concentration of H+ ions by 1o.

[OH^-] = (100.00 x 0.020 x 2  +  50.00 x 0.100) / 150.00

          = 0.06 M

pOH = -log0.06 = 1.22

pH = 14 - pOH

      =  14 - 1.22 = 12.78

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Why you should not store fruit juices in a pewter pitcher?.

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Because even little amounts of the natural acids present in some meals can cause metal to pit or discolor, it is not advised to use pewter as a food container.

What is the purpose of a pewter pitcher?

Elegant pewter pitchers are excellent for serving iced tea, iced water, or even wine. We make each of handmade pewter pitchers using techniques that have been in use for generations. They are lead-free and food-safe, just as all other our pewter goods are.

Are pewter pitcher secure?

Modern pewter is safe to use and lead-free. It is mostly comprised of tin, with some copper and antimony. The goods have been guaranteed lead-free and perfectly safe to be used for all types of food and drink, according to one maker.

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the tires of a car make 73 revolutions as the car reduces its speed uniformly from 94.0 km/hkm/h to 58.0 km/hkm/h. the tires have a diameter of 0.90 mm.

Answers

The acceleration of the carl is -1.022 m/s².

We need to know about acceleration to solve this problem. The acceleration can be defined as the change in speed per interval of time. It can be written as

v'² = v² + 2 . a . s

where a is acceleration, v' is final velocity, v is initial velocity and s is the distance

From the question above, the given parameters are

v' = 58 km/h = 16.11 m/s

v = 94 km/h = 26.11 m/s

d = 0.9 m

revolution (n) = 73

Find the distance

s = n . π . d

s = 73 . 3.14 . 0.9

s = 206.48 m

Find the angular acceleration

v'² = v² + 2 . a . s

16.11² = 26.11² + 2 . a . 206.48

412.97a = -422.2

a =  -1.022 m/s²

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the replacement of rna by dna as the primary carrier of genetic information was based on dna's (fill the blank) and (fill the blank).

Answers

The replacement of RNA by DNA as the primary carrier of genetic information was based on DNA's double helix and chemical stability. RNA is more unstable and prone to degradation due to presence of ribose sugars rather than deoxyribose of DNA.

What is DNA?

DNA (deoxyribonucleic acid) consists of two polynucleotide chains that coil around one another to form a double helix. The DNA backbone is composed of alternating phosphate groups and deoxyribose sugar molecules. DNA is made up of four nucleotides namely, adenine (A), thymine (T), guanine (G), and cytosine (C).

What is RNA?

RNA, also known as ribonucleic acid, is a polymeric molecule crucial for coding, decoding, control, and expression of genes in a variety of biological processes. RNA is typically single-stranded in nature. The RNA molecule consists of a backbone with alternating phosphate groups and ribose sugar molecules. Each sugar has one of the four bases adenine (A), uracil (U) (instead of thymine), cytosine (C), or guanine attached to it (G).

Why is DNA more stable than RNA?

DNA is double-stranded in nature unlike RNA which is single-stranded. The hydrogen bonds connecting the nucleotide bases of the two strands of DNA release free energy thus making DNA thermodynamically stable.

RNA contains ribose sugar rather than deoxyribose sugar in DNA. The ribose sugar contains 2′-hydroxyl group on the pentose ring. This property of RNA makes it more susceptible to hydrolysis.

Thymine shows more resistance to photomutation compared to Uracil. This makes DNA more resistant towards mutations caused due to radioactivity.

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table 7 of the data booklet lists melting points of the elements. explain the trend in the melting points of the alkali metals, halogens, and period 3 elemtns

Answers

The aforementioned claim is true: electronegativity rises (along period 3 from Na to Cl).

How is melting point determined?

The symmetry and the force the interaction between molecules in a substance dictate its melting point. Intermolecular interactions that are stronger lead to higher melting points. Due to the strength of the ion-ion electrostatic interaction, ionic compounds typically have high melting points.

What exactly is the melting and how is it determined?

By placing a tiny amount of an organic solid into a tiny capillary tube, affixing it to the stem of either a thermometer centered in a heating bath, slowly heating the bath, and observing the temps at which melting commences and is complete, it is possible to determine the properties of an organic solid.

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