When following the scientific method, why would asking a subjective question be
an inappropriate part of the procedure?
•A subjective question means it has little or nothing to do with the observation.
•A subjective question would negate any findings from the observation.
•A subjective question is too specific and needs to be simplified to conduct an
experiment.
•A subjective question deals with opinions, morals, and emotions and is not suited
for science.

it's nonmetal

Sulfur has nonmetal properties. It is fragile, lacks shine, and cannot conduct electricity. Sulfur is located in the third period of group 16/VIA on the periodic chart. The chalcogens or oxygen group is the name of the group.

Natural substances known as non-metals are brittle and thermally and electrically inert (can not be easily rolled, molded, extruded, or pressed). The non-metallic elements in the periodic table are hydrogen, carbon, nitrogen, oxygen, phosphorus, arsenic, and selenium.

The group of nonmetals consists of seven elements:

Hydrogen (sometimes called an alkali metal) (sometimes considered an alkali metal)

Carbon. \sNitrogen. \sOxygen. \sPhosphorus. \sSulfur. \sSelenium.

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Answer:

it produces amino acids and proteins. It is also needed to make chlorophyll in plants, which is used in photosynthesis to make their food.

Starch is a complex carbohydrate that is primarily made up of glucose molecules.

It is made up of many molecules that are connected together to form a long chain or polymer.

Starch is a polysaccharide, which means it is made up of many monosaccharide (simple sugar) molecules joined together.
The glucose molecules in starch are joined together by alpha-glycosidic linkages.

Starch is comprised of hundreds and perhaps thousands of glucose molecules.

The number of glucose molecules in a starch molecule can vary, but the average size of a starch molecule is around 1,000 glucose molecules.
Starch is an important food source for humans and other animals.

It is found in a variety of foods, including potatoes, rice, bread, and pasta.

When we eat foods that contain starch, our bodies break down the starch into glucose molecules that can be used for energy.
In conclusion, starch is comprised of hundreds and perhaps thousands of glucose molecules.

Starch is an important food source for humans and other animals.

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The balanced equation for the reaction of hydrogen gas (H2) with iodine gas (I2) is:

H2(g) + I2(g) → 2HI(g)

In this reaction, hydrogen gas reacts with iodine gas to produce hydrogen iodide gas. The reaction is a combination or synthesis reaction, where two elements combine to form a compound.

The equation is balanced with coefficients of 1 in front of H2 and I2, and a coefficient of 2 in front of HI to ensure equal numbers of atoms on both sides of the equation.

The phase labels in the equation represent the states of the substances involved: (g) indicates a gaseous state. In the reaction, both hydrogen gas and iodine gas are in the gaseous state, and hydrogen iodide gas is also in the gaseous state.

It's important to note that the reaction between hydrogen gas and iodine gas is an exothermic reaction, meaning it releases energy in the form of heat. This reaction is often used to illustrate the concept of a redox reaction, as hydrogen undergoes oxidation from an oxidation state of 0 to +1, while iodine undergoes reduction from an oxidation state of 0 to -1.

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The product of KMnO4, NaOH, H2O, and H3O is 3MnO2 + 4Na2MnO4 + 9H2O.

The balanced chemical equation for the given reaction is:

3KMnO4 + 4NaOH + 6H2O → 3MnO2 + 4Na2MnO4 + 9H2O

The terms in the reaction given are:

KMnO4 (potassium permanganate), NaOH (sodium hydroxide), H2O (water), and H3O (hydronium ion) are the terms in the reaction given.

To get the product of KMnO4, NaOH, H2O, and H3O first, we have to balance the given chemical equation before finding the product.

Let's go:

3KMnO4 + 4NaOH + 6H2O → 3MnO2 + 4Na2MnO4 + 9H2O

Hence, the product of KMnO4, NaOH, H2O, and H3O is 3MnO2 + 4Na2MnO4 + 9H2O.

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1) The required mass of iron III oxide is 2.1 Kg

2) The empirical formula of aluminum oxide is  \(Al_{2} O\).

3) The mass of lithium chloride required is 27.7 g

4) The mass of carbon dioxide produced is 186.6 g

We have to note that we can only be able to obtain the parameters that has to  do with an equation when we can be able to use the stoichiometry of the reaction and this depends on the equation of the reaction.

1) Number of moles of iron =  1.50 * 10^3 g/ 56 g/mol

= 26.8 moles

If 2 mole of iron III oxide produces 4 moles of iron

x moles of  iron III oxide produces  26.8 moles of iron

x = 13.4 moles

Mass of the iron III oxide = 13.4 moles * 160 g/mol

= 2.1 Kg

2) Number of moles of Al = 2.91 g/27 g/mol

= 0.11 moles

Number of moles of oxygen = ( 5.50  -  2.91 )/32 g/mol

= 0.06 moles

Dividing through by the lowest ratio, the empirical formula is \(Al_{2} O\).

3) Number of moles of lead II acetate = 106 g/325 g/mol

= 0.33 moles

If 1 mole of  lead II acetate reacts with 2 moles of lithium chloride

0.33 moles would react with 0.33 * 2/1

= 0.66 moles of lithium chloride

Mass of the the lithium chloride = 0.66 moles * 42 g/mol

= 27.7 g

4) Number of moles of octane =  60.3 g/114 g/mol

= 0.53 moles

2 moles of octane produces 16 moles of carbon dioxide

0.53 moles  of octane produces 0.53 * 16/2

= 4.24 moles

Mass of carbon dioxide = 4.24 moles * 44 g/mol

= 186.6 g/mol

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a) The following is the flowchart of the process and the degree-of-freedom analysis for the given situation:b) To calculate the mass fraction of methanol in the bottom product stream:Mass flow rate of the product stream is given to be 673 kg/h.Fraction of methanol in the bottom product stream = 1 - 0.96 = 0.04

Mass of methanol in the product stream = 673 × 0.04 = 26.92 kgMass of water in the product stream = 673 - 26.92 = 646.08 kgMass fraction of methanol in the product stream = 26.92/673 = 0.04 To calculate the mole fraction of methanol in the bottom product stream:For the distillation of a mixture containing equal parts of mass of methanol and water, the relative volatility is given as:Relative volatility = α = y methanol /x methanol = x water /y water = 1Molar flow rate of the distillate stream = QD × y methanol = 1000 × 0.96 = 960 kmol/hMolar flow rate of the bottom stream = QB × x methanol = 673 × 0.04/32 = 0.84 kmol/h

Let the molar flow rate of methanol in the bottom product stream be yB and that of water be yBW and yB are related as:yB + yBW = 0.84yB/yBW = 1/α = 1Substituting yB + yBW = 0.84 and yB/yBW = 1 in the above two equations and solving, we get:yB = 0.42 kmol/hyBW = 0.42 kmol/hMole fraction of methanol in the bottom product stream = yB/(yB + yBW) = 0.5Mole fraction of water in the bottom product stream = yBW/(yB + yBW) = 0.5c) Possible reasons for the discrepancy could be:Inaccurate measurement of the bottom product stream flow rate.Inaccurate measurement of the composition of the distillate stream.

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Answer: Ionic attractions

Explanation:

Ionic bonding is a type of chemical bond that involves the electrostatic attraction between oppositely charged ions.

To answer if a salt is formed between the reaction of a base and an acid, we need to remember that, if we react a strong acid and a strong base, such as HCl and NaOH, two products will be formed: the appropriate salt and water.

In the example above, we can write the reaction as:

HCl + NaOH -> NaCl + H2O

where a strong acid and a strong base react to form a salt (NaCl) and water (H2O).

Thus, we can say that, yes, a salt is formed when an acid and a base react between each other.

No, the volume of water in a beaker is not an extensive property.

Extensive properties are those that depend on the amount or size of the substance being measured. In other words, they are properties that change with the quantity of the substance. Examples of extensive properties include mass, volume, and total energy.

In the given scenario, the volume of water in the beaker is 50 milliliters. This volume remains the same regardless of the quantity of water present. Whether it's 50 milliliters or 500 milliliters, the volume measurement does not change. Therefore, the volume of water in the beaker is an example of an intensive property.

Intensive properties are independent of the amount or size of the substance. They are characteristics that remain constant regardless of the quantity of the substance. Examples of intensive properties include temperature, density, and color.

It's important to note that the distinction between extensive and intensive properties depends on the specific property being considered. While volume is typically an extensive property for a bulk substance, in the case of a fixed volume of water in a beaker, it becomes an intensive property.

In summary, the volume of water in a beaker is not an extensive property but rather an intensive property because it does not change with the quantity of the substance.

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An unstable nucleus undergoes radioactivity, which refers to the spontaneous disintegration of the nucleus or the emission of particles and/or electromagnetic radiation. Radioactivity is a natural process that occurs in certain atomic nuclei that are inherently unstable. These nuclei strive to attain stability by undergoing radioactive decay, which can involve the emission of alpha particles, beta particles, gamma rays, or a combination thereof.

Unstable nuclei contain an imbalance in the number of protons and neutrons, making them energetically unstable. In order to reach a more stable configuration, these nuclei undergo radioactive decay. This process involves the spontaneous transformation of the nucleus, where it disintegrates or emits particles and/or electromagnetic radiation.

There are several types of radioactive decay. One type is alpha decay, where an alpha particle consisting of two protons and two neutrons is emitted from the nucleus. Another type is beta decay, which can occur in two forms: beta-minus (β-) decay and beta-plus (β+) decay. In beta-minus decay, a neutron within the nucleus is converted into a proton, and an electron (beta particle) is emitted. In beta-plus decay, a proton in the nucleus is converted into a neutron, and a positron (positive beta particle) is emitted.

Additionally, radioactive decay can also involve the emission of gamma rays. Gamma rays are high-energy photons that are released during the transition of the nucleus to a lower energy state. These rays are a form of electromagnetic radiation.

Overall, the radioactivity of an unstable nucleus manifests through the spontaneous disintegration of the nucleus or the emission of particles (alpha and beta particles) and/or electromagnetic radiation (gamma rays). The specific type of radioactive decay that occurs depends on the characteristics and composition of the unstable nucleus.

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70.9-gram sample of \(Cl_{2}\) gas will occupy Opton C. 22.4 liters at STP.

To determine the volume occupied by the sample of \(Cl_{2}\) (g) at STP, we can use the ideal gas law equation, PV = nRT

where P = pressure

V = volume

n = number of moles

R = ideal gas constant

T = temperature.

At STP (Standard Temperature and Pressure), the pressure is 1 atmosphere (atm) and the temperature is 273.15 Kelvin (K).

First, calculate the number of moles of \(Cl_{2}\) (g) using its molar mass. The molar mass  \(Cl_{2}\) is 70.9 grams/mol.

Number of moles (n) = mass (m) / molar mass (M)

n = 70.9 g / 70.9 g/mol

n = 1 mol

Now, we can calculate the volume using the ideal gas law:

V = (nRT) / P

V = (1 mol * 0.0821 L·atm/mol·K * 273.15 K) / 1 atm

V ≈ 22.4 L

Therefore, the correct answer is C. 22.4 L.

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Answer:

C

Explanation:

Answer:

NaCl

Explanation:

Because it's sodium chloride

When carburetor heat is applied, the change that occurs in the fuel/air mixture is the reduction of air density, leading to a richer mixture.

Carburetor heat is a feature in aircraft engines designed to prevent or alleviate the formation of ice within the carburetor. During flight in certain weather conditions, such as high humidity or low temperatures, the rapid expansion of fuel vapor in the carburetor can cause a drop in temperature, leading to the formation of ice on the carburetor surfaces.

When carburetor heat is applied, a portion of the engine's heated air is redirected to warm the incoming air entering the carburetor. As a result, the temperature of the incoming air increases, causing the ice to melt and preventing further ice formation.

However, this process also has an impact on the fuel/air mixture. By introducing warmer air, the overall air density decreases. The reduction in air density means that the same volume of air contains fewer oxygen molecules, resulting in a richer mixture. This occurs because the fuel flow remains relatively constant while the amount of air entering the carburetor is reduced due to the expansion caused by the heated air.

Pilots need to be aware of this change and make appropriate adjustments to the engine's mixture control to maintain the correct fuel/air ratio for optimal engine performance during carburetor heat operation.

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³⁸₁₈Ar nucleus completes the given equation, hence option D is correct.

The equation provided illustrates how an unstable chlorine isotope breaks down into a beta particle and an argon nucleus. To create an Argon nucleus that is more stable, the nucleus emits a beta particle.

Stable isotopes and supposedly unstable or radioactive isotopes are the two categories into which isotopes fall in science. These last ones are stable and don't produce radioactive radiation.

While Xenon and other isotopes are known to be stable, Xenon-124 and Xenon-136 deteriorate over the course of several trillion years.

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Answer:

A. 6atm

Explanation:

Using pressure law equation:

P1/T1 = P2/T2

Where;

P1 = initial pressure (atm)

T1 = initial temperature (K)

P2 = final pressure (atm)

T2 = final temperature (K)

According to this question;

P1 = 3 atm

P2 = ?

T1 = 120K

T2 = 240K

Using P1/T1 = P2/T2

3/120 = P2/240

Cross multiply

240 × 3 = P2 × 120

720 = 120P2

P2 = 720/120

P2 = 6atm

Answer:

C. oxygen

Explanation:

oxygen cannot for a polar covalent bond with another oxygen atom

Answer:

oxygen

Explanation:

At 298 K, the reaction's standard free energy change is G0 = - 115 kJ. The calculated values of Go are very helpful in determining whether a reaction will take place spontaneously if the reactants and products are combined under typical circumstances.

Standard entropy change (H°) is 50.6 kJ/mol at 25 °C, and the absolute entropies of the products and reactants are S°(N2H4) = 121.2 J/(mol•K), S°(N2) = 191.6 J/(mol•K), and S°(H2) = 130.7 J/(mol•K).

According to the Gibbs phase rule, where n is the number of thermodynamic degrees of freedom in the system, the relationship between the number of phases (p) and components (c) in a given alloy under equilibrium conditions at constant pressure is given as p+n=c+1.

The calculated values of Go are very helpful in determining whether a reaction will take place spontaneously if the reactants and products are combined under typical circumstances. The internal, kinetic, and potential energies of a system are simply added together to form the total energy E: E=me=m(u+ke+pe)=U+KE+PE.

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The moles of water produced from 3.07 mol of H2O2 are 64.47 moles. Answer: 64.47

Part A Given the following decomposition reaction, calculate the moles of water produced from 3.07 mol of

H2O2.2 H2O2(1) → 42 H2O(l) + O2(g)

Molar ratio between H2O2 and

H2O is 2:42 or 1:21.

Therefore, moles of water produced from 3.07 mol of H2O2 is:

Moles of water produced = Moles of H2O2 × 21/1 = 3.07 × 21 = 64.47 (approx)

Therefore, the moles of water produced from 3.07 mol of H2O2 are 64.47 moles.

Answer: 64.47

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Expressing the answer with the appropriate units, we have:

3.07 moles of water.

Moles of water: Moles of a substance are a measure of the amount of that substance present. It is a unit used in chemistry to quantify the number of particles (atoms, molecules, or ions) in a sample.

The balanced equation for the decomposition reaction of hydrogen peroxide \(\rm(H_2O_2)\) is: \(\rm\[2H_2O_2(\ell) \rightarrow 2H_2O(\ell) + O_2(g)\]\)

According to the stoichiometry of the reaction, for every 2 moles of \(H_2O_2}\) consumed, 2 moles of \(H_2O\) are produced.

To calculate the moles of water \((H_2O)\) produced from 3.07 moles of \(H_2O_2\), we can set up a ratio: (3.07 moles \(\rm H_2O_2\)) x (2 moles \(\rm H_2O_\) / 2 moles \(\rm H_2O_2\)) = 3.07 moles \(\rm H_2O\)

Therefore, from 3.07 moles of \(\rm H_2O_2\), 3.07 moles of \(\rm H_2O\) are produced.

Thus, Expressing the answer with the appropriate units, we have:

3.07 moles of water.

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Answer: There are 7 neutrons present in the nucleus of this atom.

How many neutrons are in its nucleus?

When we subtract the atomic number from the mass number of an element, we can determine the number of neutrons in an element. The atomic number is equivalent to the number of protons present in the nucleus.

It's also known as the Z number. We can obtain the neutrons' number by subtracting the atomic number from the mass number. In this instance, the mass number is 13, and the atomic number is 6. Therefore, 13 - 6 = 7.

Therefore, the answer is that there are 7 neutrons present in the nucleus of this atom.


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Answer: m mm

/lk ac

Explanation:

When mercurous nitrate paper is exposed to ammonia gas then black color is produced due to the formation of Hg₂NH₂NO₃ + Hg.

The reaction of mercurous nitrate paper with ammonia gas produces the compound mercury amidonitrate and mercury metal.

This mercury amidonitrate contains the mercury I ion (Hg2^+). Since the compound contains mercury I ion, mercury amidonitrate  has the formula; Hg₂NH₂NO₃.

The compounds formed therefore are; Hg₂NH₂NO₃ + Hg

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Answer:non matter

Explanation:

Answer:

B) Conduction requires two objects to be in physical contact.

Explanation:

Conduction is when two objects are directly touching each other. So, the objects must come in physical contact with each other.

The correct answer is option a.

Atoms can be electrically neutral (with no overall charge) when they have an equal number of protons and electrons.

This is because the protons have a positive charge and the electrons have a negative charge, and when they are equal, they cancel each other out, leaving the atom with no overall charge.

Options A and C are incorrect because an equal number of protons and neutrons or uncharged neutrons in the nucleus does not guarantee an equal number of electrons, which are necessary for a neutral charge. Option D is also incorrect because there are no charged subatomic particles in neutral atoms.

Therefore, option B is the correct answer.

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Ques.1: Why do you think that you had to use a thin layer of onion skin, rather than a thick layer for the microscope?

Ans:- It is because, I the onion peel is thick layered, then it will be hard or impossible to see through the microscope.

Ques.2: When iodine reacts with starch, it produces a blue-black color. Starch is a white substance which plants use to store food. What structure did you see better because of the iodine? Why did you see this structure better?

Ans: Amylose in starch is responsible for the formation of a deep blue color in the presence of iodine. The iodine molecule slips inside of the amylose coil.

This makes a linear triiodide ion complex with is soluble that slips into the coil of the starch causing an intense blue-black color.

Due to this, we can see the structure better.

Ques.3: From low power to high power, what structures became clearer in the stained onion tissue?

Ans: From lower to higher power, we can see:-

-- Large, rectangular interlocking cells,

-- Clearly visible distinct cell walls surrounding the cells,

-- Dark stained nucleus,

-- Large vacuoles at the center,

-- Small granules may be observed inside the cells (within the cytoplasm)

Ques.4: What is the shape of an onion cell?

Ans: The shape of an onion cell is rectangular or square in shape.

Answer:

Explanation:

#1 (highest): Bovine meat (beef herd)

Beef has the highest carbon footprint of any food. This is because of what is required to raise and farm cattle. Animals used for beef production require a tremendous amount of feed, which must be grown on its own. They also produce an extremely high amount of methane

5.00 moles of a binary, group 2 oxide are found to have a mass of 521 g. The group 2 metal is Strontium.

According to question 5 moles of binary group 2 metal oxide mass =521  g

So, 1-mole metal oxide mass will be =521 / 5=104.2 g

Now, as metal oxide is group 2 oxide so metal: oxygen =1: 1

So the mass of metal is =104.2-16=88.2 gm (as the atomic mass of oxygen is 16 g

Therefore, the metal is Strontium(Sr) whose atomic mass is 87.62 g which is nearly 88.2 gm

So, the formula of metal oxide is SrO

The group two metal here is Sr which is strontium and lies in the same group as calcium.

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