what atomic or hybrid orbitals make up the sigma bond between and in acetic acid, ? ( is the second carbon in the structure as written. is the first oxygen in the structure as written.) orbital on orbital on what is the approximate bond angle? angle

Answer:

Frederich Miescher- first person to isolate DNA and RNA

Frederick Griffith- first to demonstrate horizontal transmission of dna using bacteria

Gregor Mendel- documented and demonstrated inheritance patterns

Thomas Hunt Morgan- identified chromosomes as the structures responsible for inheritance

Joachim Hammerling- demonstrated that the hereditary information of of eukaryotes is contained within the nucleus

Alfred Hershey and Martha Chase- demonstrated that dna not protein was the molecule responsible for hereditary

George Beadle and Edward Tatum- used mutants to show the relationship between DNA and proteins

Albrecht Kossel- characterized the structure of adenine, guanine, cytosine, thymine, and uracil

Explanation:

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Match the scientist with their achievement:

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Answer:

14.7 g of chromium

Explanation:

In order to determine the element being oxidized in the redox reaction, we need the complete balanced equation for the reaction.

The given information "C3H8O2 + KMnO4" is not a balanced equation and lacks the products and reaction conditions.

To identify the element being oxidized, we need to compare the oxidation states of the elements before and after the reaction. In a redox reaction, oxidation involves an increase in oxidation state, while reduction involves a decrease in oxidation state.

Please provide the complete balanced equation for the reaction, including the products and any other relevant information, so I can assist you in determining the element being oxidized.

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Answer:

2090 joules are released.

Explanation:

Calorimetry is applied to this problem:

Q = m . C . (Final T° - Initial T°)

C is the Specific Heat, a constant for each substance, that determines the heat per unit mass, which is required to raise one degree Celsius.

C for water is 4.18 kJ /kg.°C

We convert the mass of water to kg

50 g . 1kg / 1000 g = 0.05 kg

Let's replace data in the formula:

Q = 0.05 kg . 4.18 kJ /kg.°C (60°C - 70°c)

Q = -2.09 kJ

As we have a negative value, heat is released. We need the |Q| for the value

2.09 kJ . 1000 J /kJ = 2090 joules

The hydrogen cyanide (HCN) molecule consists of three atoms: hydrogen (H), carbon (C), and nitrogen (N). It forms a linear molecular structure. In HCN, the bond between carbon and nitrogen is a triple bond (C≡N), which consists of one sigma bond and two pi bonds.

The sigma bond is formed by the overlap of one hybridized orbital from carbon and one hybridized orbital from nitrogen. The two pi bonds are formed by the overlap of unhybridized p orbitals, one from each atom.

The sigma bond provides strong and direct bonding, while the pi bonds contribute to the overall stability of the molecule. Therefore, the HCN molecule contains one sigma bond and two pi bonds.

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The best practices while sharing a lab balance with other students  are cleaning if dirt is present it is needed to be cleaned as it will introduce errors in the measurements.

Errors in chemical analysis result when there is a difference between observed value and the true value.If the magnitude of errors is large , it results in decrease in accuracy, reproducibility, and precision.

There are three types of errors:1) random error 2) systematic error 3) human error.The cause of random errors are difficult to quantify while the human errors can be minimized by taking a range of readings to reduce the error.

Errors while measuring boiling point may be human errors while noting down the boiling temperature or instrumental or systematic error if there is a fault in the thermometer.

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The reaction equation is the chemical formula of reagents and product substances  

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products  

Mol ratio :

Pbs : O₂ : PbO : SO₂ = 2 : 3 : 2 : 2

mol PbO

\(\tt \dfrac{2}{2}\times 2.4=2.4\)

mol SO₂

\(\tt \dfrac{2}{2}\times 2.4=2.4\)

mol PbO

\(\tt \dfrac{2}{3}\times 2.4=1.6\)

mol SO₂

\(\tt \dfrac{2}{3}\times 2.4=1.6\)

(c) 5.3 mol PbS

mol PbO

\(\tt \dfrac{2}{2}\times 5.3=5.3\)

mol SO₂

\(\tt \dfrac{2}{2}\times 5.3=5.3\)

mol PbO

\(\tt \dfrac{2}{3}\times 5.3=3.53\)

mol SO₂

\(\tt \dfrac{2}{3}\times 5.3=3.53\)

Filling in the gaps in the excerpt below

Molecules that do not  __Dissociate__________ (or come apart) in solution are called ___Non-electrolyte substances_________ . Most of these substances are covalently bonded __and do not conduct electricity__________ (e.g., glucose, urea, and creatinine). In contrast, a(n) ___Electrolyte_________ is any substance that dissociates in solution to form Salts

Electrolytes are substances that conduct electricity because they readily ionize when placed in a solution. while Non-electrolytes do not readily conduct electricity because they do not dissociate  into ions when placed in a solution.

Hence we can conclude that the answers to your questions are as listed above.

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The mass percentage of acetic acid in this vinegar sample s found to be 7.2%.

The moles are given as Moles = Mass/Molar mass, the molar mass of the acetic acid is 60 g/mol,

Now, we also know that Density = Mass/volume.

Density of solution is 1.00 g/mL and volume is 25mL. So, the mass of the solution will be,

1.00 = Mass/25

Mass = 25 grams.

Now, for mass of acetic acid,

0.03 = Mass/60

Mass = 1.8 grams.

The mass percentage of acetic acid will be given as the mass of acetic acid divided by the total mass of the vinegar solution times 100.

Mass percentage = 1.8/25 x 100

Mass percentage of the acetic acid is 7.2%.

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The amount of Tigan that should be given for the post c-section patient is 0.4 ml.The medication Tigan is an antiemetic drug that is commonly used to treat nausea and vomiting. It is available in an injection form, and the concentration is 100 mg/ml. The floor stock is a 5 ml vial of Tigan.

To calculate the number of milliliters that should be administered, use the following formula:Amount needed (mg) / Concentration (mg/ml)

= Volume (ml)0.2 g of Tigan is needed.

1 g is equivalent to 1000 mg. Therefore, 0.2 g is equal to 200 mg.

The concentration of the floor stock is 100 mg/ml.Volume (ml) = Amount needed (mg) / Concentration (mg/ml)Volume (ml)

= 200 mg / 100 mg/mlVolume (ml)

= 2 ml

Since 2 ml is the volume of the solution for 200 mg of Tigan and you only need 0.2 g of Tigan, divide 2 ml by 10, which equals to 0.2 ml (or 0.4 ml rounded to the nearest tenth).

Thus, 0.4 ml of Tigan should be given to the post c-section patient.

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The equilibrium vapor pressure with respect to water (eow) is 259.9 Pa. assume that saturation vapor pressure is same as equilibrium vapor pressure.

Therefore, the RH at the frost point is  

RH = (eow / saturation vapor pressure) × 100

= (259.9 Pa / 259.9 Pa) × 100

= 100%

b) At T = -11 °C, we need to compare the equilibrium vapor pressure with respect to water (eow) and the equilibrium vapor pressure with respect to ice (coi) to determine if ice particles will form. From the given table, at T = -11 °C, the equilibrium vapor pressure with respect to water (eow) is 237.7 Pa, and the equilibrium vapor pressure with respect to ice (coi) is 165.3 Pa.

The air is supersaturated with respect to ice, and the presence of Kaolinite particles can provide surfaces for water droplets to condense onto, leading to the formation of ice particles.

c) At T = -12 °C, we compare the equilibrium vapor pressure with respect to water (eow) and the equilibrium vapor pressure with respect to ice (coi). From the given table, at T = -12 °C, the equilibrium vapor pressure with respect to water (eow) is 217.3 Pa, and the equilibrium vapor pressure with respect to ice (coi) is 181.2 Pa.

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Answer:

It is a Mixture

Explanation:

It's a mixture because it was a substance made from mixing other substances together. And when the magnet went over the powder, the iron  is lifted and not the sulfur. So the different parts of it can be separated by any physical means that allows the parts to seen separated

Answer:

its is a mixture

Explanation: because I did the question

Answer:

work is something u are working hard to get money or you are dedicated to it to have a daily wage

It is anticipated that temperatures in the lower atmosphere would rise as carbon dioxide (\(CO_2\)) levels in the atmosphere continue to rise. This is because CO2, a greenhouse gas, keeps heat from going back into space and instead stores it in the atmosphere. More heat will be trapped when \(CO_2\) concentration rises, producing a warming effect. The Greenhouse Effect is a common name for this phenomenon.

According to predictions made by the Intergovernmental Panel on Climate Change (IPCC), a doubling of atmospheric \(CO_2\) concentrations might lead to a 1.5–4.5 degree Celsius rise in global temperature. Among other things, this temperature rise may have a profound effect on ecosystems, weather patterns, and sea levels.

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The total pressure when the new equilibrium is stabilized is half of the initial pressure of the system.

The given chemical reaction at a stable equilibrium is,

2H₂O(g)+O₂(g) = 2H₂O₂(g)

According to the ideal gas equation,

PV = nRT

P is pressure,

V is volume,

n is moles

R is gas constant,

T is temperature.

Assuming the temperature is constant.

If the volume of the system is twice the initial volume then the total pressure at the new equilibrium can be found out as,

P₁V₁ = P₂V₂

Where, P₁ and V₁ are initial volume and pressure while P₂ and V₂ are final pressure and volume.

If V₂ = 2V₁,

P₂ = P₁/2

So, the final total pressure will be half of the initial pressure.

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The third ionization energy is the energy required to remove a third electron from an atom. Zinc (Zn) has a greater nuclear charge than scandium (SC) due to its higher atomic number, which means that its electrons are held more tightly by the nucleus.

Therefore, it takes more energy to remove a third electron from Zn than from SC, making the statement true.

the third ionization energy of Zn (Zinc) is higher than Sc (Scandium). This is because Zn has a completely filled 3d10 subshell, making it more stable and harder to remove an electron, while Sc has a less stable 3d1 configuration.

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Answer:

Two (2) electron pairs

Explanation:

The sharing of electron pairs by atoms forms a type of bond called COVALENT bond. Atoms that form covalent bonding (share electrons) do so in order to fill their outermost electron shells, hence, gain chemical stability.

However, when two atoms like carbon share TWO PAIRS of electrons with each other, a DOUBLE BOND is formed. An example is the double bond formed in Ethylene (2HC=CH2). A total of four valence electrons (a pair from each carbon) are shared between the two carbon atoms.

Adding Cl⁻ ions to the saturated solution of calcium hydroxide, Ca(OH)₂ (s) ⇌ Ca²⁺ (aq) + 2OH⁻ (aq), will not have any effect on the position of equilibrium.

Correct option is, D.  none.

The addition of Cl- does not involve any of the species involved in the reaction (Ca2+, OH-, or Ca(OH)2(s)), therefore it will not affect the equilibrium. The equilibrium will remain as is, without any shift to either the reactant or product side. Additionally, it will not increase the concentration of Ca(OH)2, as it is already in a saturated solution and cannot dissolve any further. Therefore, the correct answer is (d) none.

This is because Cl⁻ ions are not involved in the equilibrium reaction, and therefore, they will not interfere with the reaction or affect the position of equilibrium. The reaction will continue to maintain its equilibrium state.

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Answer:

The earlier bog bodies that were discovered in the 1600s might have not been preserved properly due to a lack of knowledge on how to preserve them or a lack of awareness of their significance. It is also possible that they might have decayed and decomposed over time and not survived till the present day. However, the bog bodies found after the late 1800s were preserved and studied extensively due to the increasing awareness and understanding of their historical and archaeological significance.

Explanation:

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Answer:

has

Explanation:

has

Answer:

has

Explanation:

extracting energy from nuclear fuels is more expensive than extracting energy from fossil fuels

The pOH of a solution with [OH] = 9.0 × 107 will be D (6.04).

A ph value is the measure of acidity and the basics of a substance or solution.

Given;

[OH] = 9.0 × 10^7

pOH = - log [OH⁻]

pOH = - log (9.0 x 10⁻⁷)

pOH = 6.0457

Hence, The pOH of a solution with [OH] = 9.0 × 107 will be D (6.04).

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Answer:

The correct answer is A

Explanation:

A radio telescope is used to detect, collect and focus radio waves from distant objects in the sky or space. While a compound telescope, by design, can both refract and reflect waves. A reflection telescope uses curved mirrors to reflect light to form an image. A refraction telescope forms an image using a lens as its objective.

From the above definitions, it can be deduced that option A is the correct answer.

Answer:

There are five types of kinetic energy: radiant, thermal, sound, electrical and mechanical. Let us look at some of the kinetic energy examples and learn more about the different types of kinetic

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The distance of a marathon race in kilometers is 42.1642.

To convert miles to kilometers, we need to multiply the distance by the conversion factor of 1.61. So, for a marathon race of 26.2 miles, we can multiply 26.2 by 1.61 to get the distance in kilometers.

26.2 miles x 1.61 kilometers/mile = 42.1642 kilometers

This conversion factor is important when dealing with international races or when communicating with people from different countries. While the United States commonly uses miles for measuring distance, many other countries use kilometers. It is important to be familiar with both systems of measurement and know how to convert between them. This can prevent misunderstandings and ensure accurate communication and planning.

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False Polar molecules do contain polar bonds, but non-polar molecules do not contain polar bonds. A polar bond is a covalent bond in which electrons are shared unequally between two atoms, resulting in a partial positive charge on one atom and a partial negative charge on the other. A polar molecule is one in which the distribution of electrons is not symmetric, resulting in a dipole moment and an overall partial positive and partial negative charge.

On the other hand, non-polar molecules are those in which the electrons are shared equally between the atoms, resulting in a symmetrical distribution of electrons and no net dipole moment. Non-polar molecules can contain non-polar bonds, such as in the case of diatomic molecules like nitrogen (N2) or oxygen (O2), which have non-polar covalent bonds. However, they can also contain polar bonds if the polar bonds are arranged in a way that the net dipole moment cancels out, resulting in a non-polar molecule. An example of this is carbon dioxide (CO2), which has polar bonds but is a non-polar molecule due to its linear, symmetrical shape.

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Answer:

The atoms are vibrating in place.

Explanation:

One of the properties of an ionic substance is the possession of a crystalline structure. As Gerry observed the salt under a microscope, he discovered that it has a crystalline structure. Crystalline salts are all ionic in nature, hence the salt observed by Gerry is an ionic salt.

Solids containing a definite crystalline structure always has their particles vibrating in place. This is immediately evident as Gerry looks at the salt through a microscope.

Answer:

D.The atoms are vibrating in place

Explanation:

The interstellar matter is the hydrogen and the helium will gives the narrow absorption lines in the spectra of the some stars.

The interstellar matter is composed of the multiple phases that will distinguished by the whether matter is the  ionic, atomic, or the molecular, and the temperature and the density of the matter. The interstellar medium is the composed the primarily, of the hydrogen atom , followed by the helium atom with the trace amounts of the carbon, the oxygen, and the nitrogen.

The matter will creates the narrow absorption of the lines in the spectra of the some of the stars.

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