How do you find the number of neutrons for any atom?

A heating curve illustrates the changes in the temperature and physical state of a substance as it is heated (Option D).

The changes in the temperature and physical state shows how the substance absorbs heat and undergoes changes in its physical state, such as melting or boiling, as its temperature increases. It does not illustrate chemical changes that may occur. It also indicates phase transitions, such as melting and boiling points, where the substance changes its physical state.

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d is the answer. according to me

Answer: dwarf planets

Explanation:

Answer:

planetesimals

Explanation:

these are the building blocks of planets, sometimes called "planetesimals." Scientists think planets, including the ones in our solar system, likely start off as grains of dust smaller than the width of a human hair. They emerge from the giant, donut-shaped disk of gas and dust that circles young stars.

Answer:

The number of neutrons is variable, resulting in isotopes, which are different forms of the same atom that vary only in the number of neutrons they possess. Together, the number of protons and the number of neutrons determine an element's mass number.

Answer:

Li2SO4+H2CO3

Explanation:

put d equation this way

negative ions to positive ions

Answer:

The answer would either be Carbon or Silicon.

Explanation:

Answer:

D

Explanation:

The study of an organism's chromosomes helps in the identification of the sex of the organisms. Thus, option A is correct.

Chromosomes have been tightly bonded DNA with the genetic information of the organism. Eukaryotic humans have consisted of 23 pairs of chromosomes.

The study of chromosomes helps in the determination of the genes types and the study of genes will be related to the traits and phenotype of the organism. Among the 23 pairs of chromosomes, one pair of chromosomes has been the sex chromosome that helps in the determination of the sex of the organism.

Thus, the study of an organism's chromosomes helps in the identification of the sex of the organisms. Thus, option A is correct.

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If the sample of magnesium used in a lab was contaminated with another metal that doesn't react with hydrochloric acid, then the results obtained in the experiment would be affected.

This is because the data collected during the experiment would reflect the reaction between hydrochloric acid and the contaminated sample instead of pure magnesium. As a result, the following changes in results might have been observed:

1. The mass of the contaminated sample would be higher than the mass of pure magnesium.

2. The rate of reaction between the contaminated sample and hydrochloric acid would be slower than the reaction between pure magnesium and hydrochloric acid.

3. The volume of hydrogen gas collected from the reaction would be lower than the volume of hydrogen gas collected in the reaction between pure magnesium and hydrochloric acid.

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Answer: A galvanic cell consists of two different metals (electrodes) connected through a conducting solution (an electrolyte) and also connected externally completing a circuit.

Answer:

They move slowly enough that the particles are no longer held together, resulting in a gas. They move slower, increasing the forces of attraction that hold them together and forming a solid.

Answer:

correct answer: A=Liquid B=Gas C= solid

i'm not sure what letter but ^ that's the answer <3

The coefficient of fe(oh)2 in the balanced redox equation is 2.

What is redox reaction?

Any chemical reaction in which a participating chemical species' oxidation number changes is known as an oxidation-reduction reaction, often known as a redox reaction.

\(BrO- + H2O + 2e- > Br- + 2OH-\)

\(Fe(OH)2 + OH- > Fe(OH)3 + e-\)

\(BrO- +H2O + 2Fe(OH)2 = Br- +2Fe(OH)3\)

The way of balancing is as follows

Step 1) divide the equations into two half reactions

oxidation half reaction                reduction half reaction

Fe(OH)2  --> Fe(OH)3                   BrO-  --> Br-

Step 2) balance atoms other than oxygen and hydrogen

Fe(OH)2  --> Fe(OH)3                    BrO-  --> Br-

Step 3) add OH- ions ,where the oxygen atoms are deficient, add the H2O molecules in required number to balance H atoms

 Fe(OH)2 + OH- --> Fe(OH)3            BrO-+H2O --> Br- + 2OH-

Step4) now add required number of electrons to balance the charge. don't forget the number of electrons loss in oxidation half reaction= the number of electrons gain in reduction half reaction

\(2Fe(OH)2 +2OH- -- > 2Fe(OH)3+2e-\)

\(BrO- + H2O +2e--- > Br- + 2OH-\)

Step5) now add the both half reactions ,re write

BrO- +H2O + 2Fe(OH)2 = Br- +2Fe(OH)3.

Therefore, the coefficient of fe(oh)2 in the balanced redox equation is 2.

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Answer:

The short general principle of solubility states that "like dissolves like." Solvents that have similar polarity or charge to the solute tend to dissolve it more readily.

Solubility is the ability of a substance to dissolve based on chemical nature, intermolecular forces, and "like dissolves like" principle. Factors like particle size, temperature, and pressure affect solubility. It is expressed as the maximum amount of solute that can dissolve in a solvent.

A compound forms a dense yellow precipitate when treated with iodine and sodium hydroxide. the compound must be: Acetophenone methyl ketone.

Sodium hydroxide is every now and then known as caustic soda or lye. it's by far a common ingredient in cleaners and soaps. At room temperature, sodium hydroxide is white, odorless strong. Liquid sodium hydroxide is colorless and has no odor. it could react violently with strong acids and with water.

Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. it is a white stable ionic compound that includes sodium cations Na⁺ and hydroxide anions OH⁻.

Manufacturers may additionally use sodium hydroxide to provide soaps, rayon, paper, products that explode, dyes, and petroleum merchandise. different obligations which can use sodium hydroxide include processing cotton cloth, steel cleaning and processing, oxide coating, electroplating, and electrolytic extraction.

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Answer:

c

Explanation:

all fins are for movement

As we look around space, we find that most of it is composed of atoms of hydrogen. When the hydrogen combines with carbon, it forms an organic molecule. Which is the basis for all living things. Combining different elements together form different substances. A group of two or more atoms that are bonded together is called a molecule. And when the elements are combined in a specific way, or ratio, the substance is called a compound (e.g. water).

A pure material with only one type of atom makes up an element. A molecule is a pure material that contains either only one kind of atoms or atoms from many types of atoms.

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The given question is incomplete, so the most probable complete question is,

As we look around space we find that most of it is composed of ___. of hydrogen. When the hydrogen combines with carbon it forms a ___. which is the basis for all living things. Combining different ___ together form different substances. A group of two or more atoms that are bonded together is called a __. And when the elements are combined in a specific way, or ratio, the substance is called a ___ (e.g. water).

Answer:

Wave function

Explanation:

orbital, in chemistry and physics, a mathematical expression, called a wave function, that describes properties characteristic of no more than two electrons in the vicinity of an atomic nucleus or of a system of nuclei as in a molecule.

The salt could have been formed from the reaction between a weak acid and a strong base. When a strong acid and a strong base react, they undergo complete ionization, resulting in a neutral salt solution with a pH of 7.0.

On the other hand, a weak acid and a weak base may form a salt solution with a pH that is close to neutral but can vary depending on the specific strengths of the acid and base involved. However, when a weak acid reacts with a strong base, the resulting salt solution will be basic, with a pH greater than 7.0. Conversely, when a strong acid reacts with a weak base, the resulting salt solution will be acidic, with a pH lower than 7.0. Therefore, the only possibility remaining is that the salt solution with a pH of 5.0 was formed from the reaction between a weak acid and a strong base.

In this scenario, the weak acid partially ionizes in water, releasing some hydrogen ions (H+) and its conjugate base. The strong base fully ionizes in water, releasing hydroxide ions (OH-). The reaction between the weak acid and strong base involves the transfer of the hydrogen ion from the weak acid to the hydroxide ion, forming water. The remaining ions from the weak acid and strong base combine to form the salt. The presence of excess hydroxide ions in the solution leads to its basic nature, resulting in a pH value higher than 7.0.

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Answer:

1 grams Hydrogen is equal to 0.992122546977 mole.

Explanation:

Hydrogen is equal to 0.992122546977 mole.

To determine how much of solution A would be needed to generate the electrical energy used daily in the home

we need to calculate the ratio of the energy released by fusion of hydrogen to the electrical energy used daily.

Energy ratio = Energy released by fusion of hydrogen / Electrical energy used daily

Energy ratio = (8.4 x 10^12) / (3 x 10^8)

To simplify the calculation, we can convert the values to scientific notation with the same exponent:

Energy ratio = (8.4 / 3) x (10^12 / 10^8)

Energy ratio = 2.8 x 10^4

This means that for every unit of electrical energy used daily in the home, we would need 2.8 x 10^4 units of solution A to generate that energy.

Therefore, to generate the electrical energy used daily in the home, we would need 2.8 x 10^4 liters of solution A.

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The symbol in a chemical reaction that represents the change from reactants to products is the arrow (→).

A chemical reaction is a process, typically involving the breaking or making of interatomic bonds, in which one or more substances called reactants are changed into others called products.

Chemical reactions are usually shown as an arrow (→) with reactant(s) written on the left side of the arrow and product(s) written on the right side.

For example, the reaction between hydrogen and nitrogen gases (reactants) to produce ammonia gas (products) is depicted by an arrow.

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The number of moles of calcium chloride ( CaCl₂) are contained in the given sample is 0.045 moles.

Given that :

The mass of the calcium chloride, CaCl₂ = 5 g

The molar mass of the calcium chloride, CaCl₂ = 110.98 g /mol

The number of moles can be calculated by the formula given below :

The number of moles = mass / molar mass

where,

Mass = 5 g

Molar mass = 119.98 g/mol

The number of moles = 5 g / 110.98 g /mol

The number of moles = 0.045 moles.

The moles of the calcium chloride ,  CaCl₂ is 0.045 mol.

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Answer:

potassium (K) has a larger average atomic radius (220 pm)than sodium (Na) does (180 pm). The potassium atom has an extra electron shell compared to the sodium atom, which means its valence electrons are further from the nucleus, giving potassium a larger atomic radius.

Explanation:

hope it answers you question

have a great day!!!

The atomic size of sodium is smaller than the atomic size of potassium.

Let us remember that the atomic size increases down the group as more shell are added to an atom. We should also recall the sodium is ahead of potassium in group one.

This simply means that the atomic size of sodium is smaller than the atomic size of potassium. This is in keeping with the trends of atomic radius down the group.

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Acid denaturation and heat denaturation are both mechanisms for denaturing proteins, but they work differently.

Acid denaturation occurs when a protein is exposed to an acidic environment, typically with a pH below its pI (isoelectric point). At low pH, the protein's ionizable groups become protonated, which disrupts the non-covalent interactions that hold the protein's tertiary structure in place, causing it to denature.

Heat denaturation, on the other hand, occurs when a protein is exposed to elevated temperatures. The increase in temperature causes the protein's bonds and interactions to break, which also disrupts the protein's tertiary structure and leads to denaturation.

The temperature at which denaturation occurs can vary depending on the protein, but is typically in the range of 40-60°C. Both acid denaturation and heat denaturation can result in loss of protein function, although some proteins may be able to renature under certain conditions.

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Orange waves have a lower frequency and contain less energy than green waves.

What is Wave?

A wave is a disturbance or oscillation that travels through space and time, accompanied by the transfer of energy without the transfer of matter. Waves can take many different forms, including sound waves, light waves, water waves, and seismic waves. They can be described in terms of their frequency, wavelength, amplitude, and velocity, among other properties. Waves play a fundamental role in many areas of science and technology, including communication, medicine, and engineering.

The energy of a wave is directly proportional to its frequency, which means that higher frequency waves contain more energy than lower frequency waves. The frequency of a wave refers to the number of complete cycles or oscillations that the wave undergoes per second, and is measured in units of Hertz (Hz).

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