Why is it important for scientists to use the scientific method?
A. Scientists would not ask questions if the scientific method were
not used.
B. Experiments would not produce any data without the scientific
method.
C. The scientific method helps scientists get accurate, repeatable
results,
D. Using the scientific method means that the results will support the
hypothesis

Answer:

c

Explanation:

because the ion are Mobil which mean they are free not combined and carry a charge but when they are combined/ fixed in position they can't carry a charge so therefore can't conduct electricity  :)

A trap is a geological feature that can catch and store oil and gas. In the area of petroleum geology, the phrase "trap" is frequently employed. Because a trap.

is often generated by a mix of anticline and fault structures, the correct response is "Anticline and fault." An anticline is a sort of fold in rock strata that generates a ridge-like structure as it arches higher. A syncline is the inverse, a downward-dipping fold that generates a trough-like shape. A fault is a crack in the earth's crust caused by the movement of two pieces of rock relative to each other. When an anticline meets a fault, it forms a trap by establishing a barrier that can capture and collect material. A trap is a geological feature that can catch and store oil and gas. In the area of petroleum geology, the phrase "trap" is frequently employed. Because a trap.

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We used both the hydrogen and water coefficients from the aforesaid solution (mole ratio).

Chemical Reaction

\(2H_{2}\) + \(O_{2}\)  → \(2H_{2}O (Balanced)\)  

Assuming moles of hydrogen are the limiting reactant, calculate the moles of water

\(moles H_{2}O = (4 moles H_{2} ) \frac{2moles H_{2}O }{2moles H_{2} } = 4 moles H_{2}O\)

What is Moles?

A substance's mass, which is made up of the same number of essential components, is measured in moles. A 12 gram example has atoms that are the same as 12C. The basic building blocks of a substance could be molecules, atoms, or formula units.

The quantity of chemical elements is indicated by the mole fraction. One mole of any substance has a value of 6.023 x 1023. (Avogadro number). The byproducts of the chemical reaction can be measured using it. The unit is denoted by the sign mol.

The following expression represents the number of moles formula

Number of moles = Mass of substance / Mass of one mole .

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Once hydroxide ions have been added, the next step in balancing a redox reaction under basic conditions is to combine hydrogen ions and hydroxide ions to form water molecules.

What is a simple definition of a redox reaction?

Any chemical reaction in which a participating chemical species experiences a change in oxidation number is referred to as an oxidation-reduction reaction or redox reaction. A broad range of procedures are included under this umbrella term.

According to the given question:

Redox reactions are those in which both reduction and oxidation occur. Redox reactions, like displacement reactions, occur when one species loses electrons while the other gains them (gaining electrons).

Once hydroxide ions have been added, the next step in balancing a redox reaction under basic conditions is to combine hydrogen ions and hydroxide ions to form water molecules.

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Answer: a : 143 b : 146 c : 56

Explanation:

The complete nuclear fission reaction can be given as ⁹²₂₃₅U + ¹₀n → ³⁶₈₉Kr+₅₆¹⁴¹Ba+3 ¹₀n. The fission process releases a very high quantity of energy and frequently results in gamma photons.

The process of nuclear fission involves the splitting of an atom's nucleus creating multiple smaller nuclei. simplest energetic norms of radioactive decay, the fission process releases a very high quantity of energy and frequently results in gamma photons.

In collaboration with Austrian-Swedish scientist Lise Meitner, German chemist Otto Hahn with his colleague Fritz Strassmann made the discovery of nuclear fission of lanthanides on Monday, December 19, 1938, in Berlin. Hahn recognised that there had been an atomic "burst." Meitner and her nephew Helmut Robert Frisch conceptualised it in January 1939.  The complete nuclear fission reaction can be given as  ⁹²₂₃₅U + ¹₀n → ³⁶₈₉Kr+₅₆¹⁴¹Ba+3 ¹₀n.

Therefore, the complete nuclear fission reaction can be given as  ⁹²₂₃₅U + ¹₀n → ³⁶₈₉Kr+₅₆¹⁴¹Ba+3 ¹₀n.

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The chance of having children with blood group AB for a couple with the husband of heterozygous A (AO) and the wife of heterozygous B (BO) is 25%. The correct option is A.

The antigens of the ABO blood group are encoded by a single genetic locus, the ABO locus, which has three alternative (allelic) forms A, B, and O.

A child inherits one of the three alleles from each parent, resulting in six genotypes and four blood types.

Blood groups are inherited. They follow a Mendelian pattern, which means they are the result of a single gene.

There are three types of alleles in the ABO gene: A, B, and O. The first two, A and B, are codominant, which means they are equally dominant.

As per the attached Punnett Square, the genotype can be AB, AO, BO, and OO. So, the chance of having children with blood group AB as per the given scenario, will be 25%.

Thus, the correct option is A.

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The state of the balloon:

When the balloon is submerged in the beaker, the amount of water in the beaker will get reduced.  

What is Osmosis:    

Based on the concentration of solutes on both sides of the membrane, water will flow through a permeable membrane in a specific direction.

Hypertonic solution:

It means that there are more solutes present in the surrounding environment than in the cell itself.

Hypotonic solution:

In a hypotonic solution, the concentration of solutes inside the cell is higher than that outside the cell.

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Answer:

pls make the question clear

Explanation:

c is the correct answer

The correct answer is option A: Subtract the atomic number from the mass number.

An atom is composed of a proton, a neutron and an electron. These are collectively called subatomic particles.

The proton and neutron are found in the nucleus of the atom, surrounded by electrons.

The atomic number is the same as the number of protons in the atom or the number of electrons in the neutral atom.

The mass number is the sum of the number of protons and the number of neutrons in the atom.

Hence, to obtain the number of neutron, we subtract the atomic number from the mass number.

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The total number of electrons in an energy level (n) can be determined using the formula:

Total number of electrons = 2n²

An electron is a subatomic particle that carries a negative electric charge. It is one of the fundamental particles that make up atoms. Electrons are located outside the atomic nucleus in specific energy levels or orbitals. They are incredibly small and have a mass of approximately 9.11 x 10^-31 kilograms.

For the sixth energy level (n = 6), we can substitute the value into the formula:

Total number of electrons = 2(6)²

= 2(36)

= 72

Therefore, the total number of electrons in the sixth energy level is 72.

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The hemiacetal functional group is circled and labeled with an H, while the acetal functional group is circled and labeled with an A in each of the following carbohydrates: Sucrose.

Hemiacetal functional group: O with HAcetal functional group: Noneb. LactoseHemiacetal functional group: O with HAcetal functional group: O with CH3CHOH, i.e., -OCH3 or -OMeThe hemiacetal functional group is formed from a reaction between an aldehyde or a ketone with an alcohol group. It is also referred to as an internal alcohol due to the presence of an OH group and an ether group.The acetal functional group is formed when a hemiacetal undergoes a reaction with an alcohol in the presence of an acid catalyst. It is characterized by the presence of an ether group (-OR) and two carbonyl groups (-C=O). Carbohydrates are the most abundant biomolecules on the planet. They're a type of macronutrient that provides energy to the body. They're made up of carbon, hydrogen, and oxygen atoms. Monosaccharides, disaccharides, and polysaccharides are the three types of carbohydrates.

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The diagram that shows what has occurred is diagram D

If a substance changes color during the reaction, it can be a sign that a chemical change has occurred.

We can see from the image that we have been told that there is change in the color of the system and then when that happens, it would be clear that the molecules in the reactants must have stick together so that we can have the products of the reaction as shown.

Thus the image that shows a chemical reaction is image D

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According to the given statement The volume of the dry gas at STP is 0.259 L (259 ml).

A gas with an extremely straightforward connection between pressures, volume, and temp called an ideal gas. An ideal gas's volume and pressure are directly inversely correlated with its molecular weight and absolute temperature. Temperature and pressure in such an ideal gas are inversely correlated.

P = 789.8 mmHg = 789.8 torr

V = 256 ml

T = 25 + 273.15 = 298.15 K (temperature in Kelvin)

Having isolated the moles of gas and written the ideal gas law,

n = PV/(RT)

= (1.0382 atm) * (0.256 L) / [(0.0821 L•atm/(mol•K)) * (298.15 K)]

= 0.0111 mol

At STP, an ideal gas has a molar volume of 22.4 L. The molar volume is used as a conversion factor to determine the volume of the dry gas at STP.

P = 1 atm

T = 273.15 K

n = 0.0111 mol

V = nRT/P

= (0.0111 mol) * (0.0821 L•atm/(mol•K)) * (273.15 K) / (1 atm)

= 0.259 L

Therefore, the volume of the dry gas at STP is 0.259 L (259 ml).

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Answer:

Fewer hydrogen bonds form between alcohol molecules. As a result, less heat is needed for alcohol molecules to break away from solution and enter the air.

Explanation:

Hydrogen bonding is a kind of intermolecular interaction that occurs when hydrogen is bonded to a highly electronegative atom.

Both water and alcohols exhibit hydrogen bonding. However, alcohols exhibit fewer hydrogen bonds than water.

As a result of this, the temperature of evaporation is much higher for water than for alcohol because hydrogen bonds hold water molecules more closely than alcohol molecules are held.

Answer:

Very reactive metals, such as aluminium, form stable oxides and other compounds. Electrolysis is commonly used to extract these metals and requires a lot of electric current (energy) to reduce them to extract the metal. Less reactive metals, such as iron, form less stable oxides and other compounds.

Explanation:

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Electrolysis is the strategy by which electric flow is gone through a substance to impact a synthetic change.

This method is used to extract metals.

Electrolysis is the process in which electrons are being added to metal particles at the negative electrode. The disadvantage (especially in the aluminum case) is the expense of the power. A benefit is that it can deliver extremely unadulterated metals.

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when the temperature is raised to 325 K and the volume is increased to 1.8 L, the gas will occupy a pressure of approximately 1.08 atm.

To solve this problem, we can use the combined gas law equation, which relates the initial and final conditions of a gas when the amount of gas remains constant.

The combined gas law equation is given as:

(P₁ * V₁) / T₁ = (P₂ * V₂) / T₂

where P₁, V₁, and T₁ represent the initial pressure, volume, and temperature, respectively, and P₂, V₂, and T₂ represent the final pressure, volume, and temperature, respectively.

Given

Initial pressure (P₁) = 1.2 atm

Initial volume (V₁) = 0.9 L

Initial temperature (T₁) = 273 K

Final volume (V₂) = 1.8 L

Final temperature (T₂) = 325 K

We need to find the final pressure (P₂).

Substituting the given values into the combined gas law equation, we have:

(1.2 atm * 0.9 L) / 273 K = (P₂ * 1.8 L) / 325 K

Now, we can solve for P₂:

P₂ = (1.2 atm * 0.9 L * 325 K) / (273 K * 1.8 L)

= 1.08 atm

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The expression to be rearranged K = [CO][Cl₂] [COCI₂]  are x = 0.327 or x = 339.

The expression to be rearranged K = [CO][Cl₂] [COCI₂] is:

(0.156 - x) (0.156 - x) (0.263 + x) = 5.00 × 10⁻²

We will expand and simplify the expression:

(0.156 - x) (0.156 - x) (0.263 + x) = 5.00 × 10⁻²(0.156)² + (0.156)(x) - (x)(0.156) - (x)² (0.263 + x)

= 5.00 × 10⁻²(0.156)² - (0.263)(0.156)(x) - (0.156)(x) + (0.263)(0.156)(x) + x²(0.263 + x) - 5.00 × 10⁻² = 0

After simplifying:

-0.0132302 x² - 0.001002 x + 0.0014256 = 0

This is in the form ax² + bx + c = 0 where a = -0.0132302, b = -0.001002 and c = 0.0014256

Using the quadratic formula, we have:

\(\[x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}\]\)

Substituting values, we get:

\(\[x = \frac{-(-0.001002) \pm \sqrt{(-0.001002)^2-4(-0.0132302)(0.0014256)}}{2(-0.0132302)}\]\)

Solving, we get:x = 0.327 or 3.39 × 10²

Therefore, the solutions are x = 0.327 or x = 339.

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The mass of 17.7 mL of ethanol is approximately 14.1 g.

The density of ethanol, a colorless liquid that is commonly known as grain alcohol, is 0.798 g/mL. To calculate the mass of 17.7 mL of the liquid we will use the given formula:

mass = volume x density

Density of ethanol = 0.798 g/mL

Volume of ethanol = 17.7 mL

So, mass = volume × density

mass = 17.7 mL × 0.798 g/mL

mass = 14.1126 g (rounded to four significant figures)

Therefore, the mass of 17.7 mL of ethanol is approximately 14.1 g.

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Answer: 581 Sn and 13 Sn

Explanation:

581 Sn and 13 Sn are both Sn which are the same element with different masses. Isotopes are same element with different masses and the elements can have different masses because of different number of neurons

Answer:

Some of the chemicals used to preserve food and give it color are sodium nitrate, sodium benzoate, and propionate

Explanation:

Answer:

I think is d.

Explanation:

particles that make up the nucleus are balanced. An atom is unstable (radioactive) if these forces are unbalanced; if the nucleus has an excess of internal energy. the Instability of an atom's nucleus may result from an excess of either neutrons or protons.

I'm not sure, but hope it helps.

Forming very strong bond characteristics indicates that an atom is unstable. Hence, option D is correct.

An atom is any particle of matter which contains at least one proton.

An atom is unstable if the nucleus has an excess of internal energy.

The Instability of an atom's nucleus may be due to an excess of either neutrons or protons.

Hence, forming very strong bond characteristics indicates that an atom is unstable.

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Answer:

Explanation:

The picture shows two similar structures bonded together so it can not be an atom or molecular compound .

It is a molecule . Each structure ( lobe ) represents atom of oxygen . Molecule of oxygen contains two atoms bonded together .

Molecule of oxygen = O₂ .

Answer:

Hi! Think of it like this:

You and your family are going to go on a vaction for the holidays, to south america or somewhere else. You´re near the equator so it will be warm. If you were to move there, you might pull out the swimsiutes because most of the time, its useally warm and sunny. They dont really get cold weather. They will have a nice and warm christmas.

The number of moles of Helium gas that could occupy the container when the volume is increased to 500 mL is 9.05 mol.

We can use the combined gas law to solve this problem:

(P1 x V1) / (n1 x T1) = (P2 x V2) / (n2 xT2)

where;

We know that the pressure and temperature are constant, so we can simplify the equation to:

V1/n1 = V2/n2

Solving for n2, we get:

n2 = (V2n1) / V1

Plugging in the values, we get:

n2 = (500 mL * 4.00 mol) / 221 mL

n2 = 9.05 mol

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In the given reaction  ₉₆²⁴⁶Cm + ₆¹²C ---> 4 ¹on + X  it shows an example of an artificial transmutation reaction.

An artificial transmutation reaction may resemble this. The method of causing nuclear reactions by blasting atomic nuclei with high-energy particles like ions or neutrons is referred to as artificial transmutation.

In this instance, the transmutation is induced by bombarding the carbon nucleus (C) with additional particles or a high-energy beam, resulting in the production of the following products: Element X and 4 1on (Helium-4)

Blasting an element with a basic particle, an element can be artificially transmuted into a different element.

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Answer:gas, solid

Explanation:ck12

In a solution of hydrogen in palladium, gas is used as a solute and solid is used as a solvent.

This is defined as a homogenous mixture which comprises of two or more substances.  Solute usually dissolves in the solvent to form it.

The hydrogen acts as the solute while the palladium acts as the solvent in this case.

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The mole ratio of oxygen to pentane in the balanced equation is 8:1.

In the given equation, the coefficient in front of pentane (C5H12) is 1, indicating that 1 mole of pentane is combusted. On the other hand, the coefficient in front of oxygen (O2) is 8, suggesting that 8 moles of oxygen are needed to react with 1 mole of pentane. Therefore, the mole ratio of oxygen to pentane is 8:1.

In simpler terms, for every 1 mole of pentane that undergoes combustion, you would need 8 moles of oxygen to fully react with it and form the products mentioned in the equation. This mole ratio of 8:1 indicates the stoichiometry of the reaction, allowing us to determine the relative amounts of reactants and products involved.

The mole ratio is an essential concept in stoichiometry, helping us understand the quantitative relationships between different substances in a chemical reaction. It allows us to calculate the amounts of reactants needed or products formed based on the balanced equation. In this case, the mole ratio of 8:1 tells us that a larger quantity of oxygen is required compared to pentane for complete combustion to occur.

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