how much mass is in a proton

Explanation:

Given parameters:

   Isotope ;

           Si - 28

           ²⁸₁₄Si;

The specie undergoes an alpha decay; An alpha particle resembles a helium atom;

           ²⁸₁₄Si   →  ⁴₂He  +   ?

In nuclear reactions, the mass and atomic numbers are usually conserved;

   So let specie unknown be denote as X

          ᵃₙX;

           ²⁸₁₄Si   →  ⁴₂He  +   ᵃₙX

Sum of the mass number on the reactant side must equal to that on the product side;

         28  = 4 + a

         28 - 4  = a

               a  = 24  mass number of X;

   14  = 2 + n

   n = 14 - 2  = 12   atomic number of X;

 Now, the species X with an atomic number of 12 is magnesium

  Symbol is Mg

   Mass number   = 24

Answer:

Not quite, they are different catagories.

Explanation:

A molecule is two or more atoms connected to each other. An element is an atom with a name. Think of water, a single water molecule is called H2O because it has two hydrogen atoms and one oxygen atom. Hydrogen and oxygen are both elements. Another way to see it is like, there are many kinds of animals(atoms). A specific animal would be a cat or a bird or something(the elements).

TLDR: An element can be part of a molecule, but is not one on its own.

The scientific statement is

D. There is life on some other planet in the universe aside from Earth.

A scientific statement is a statement that is based on empirical evidence, logical reasoning, and the scientific method. It is a claim or proposition that can be tested, observed, or measured, and is subject to scrutiny and verification.

Scientific statements are characterized by objectivity, reliance on evidence, and the potential for falsifiability or validation through experiments or further investigation. these statements aim to describe, explain, or predict phenomena in the natural world and are an essential part of scientific inquiry and the advancement of knowledge.

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complete question

Which sentence is a scientific statement?

A.

Food cooked in ceramic pots has a better aroma than food cooked in copper pots.

B.

A tall glass of water tastes better with a lemon wedge and ice cubes.

C.

Today, there are more viewers watching baseball than ice hockey on television.

D.

There is life on some other planet in the universe aside from Earth

The volume of water added to dissolve potassium hydrogen phthalate (KHP) does not matter because the mass of KHP used is known and it will dissolve completely in any volume of water.

In volumetric analysis, the primary objective is to find the exact concentration of an analyte in a given solution. Analyte refers to the substance whose concentration is to be determined.In order to measure the analyte concentration, the known volume of the titrant of known concentration is added to the analyte until the endpoint is reached.Endpoint refers to the point in a titration where the reaction between the analyte and titrant is complete. The endpoint can be detected by observing a physical change in the system.In the case of KHP, it dissolves completely in any volume of water.

Therefore, the mass of KHP used can be accurately measured and dissolved in any volume of water. As a result, the volume of water added to dissolve the KHP does not affect the accuracy of the experiment.In summary, the volume of water added to dissolve KHP does not matter because the mass of KHP used is known and it will dissolve completely in any volume of water.

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Answer: Because CO2 is a very simple molecule and lacks hydrogen, it is often considered inorganic even

Because CO2 is a very simple molecule and lacks hydrogen, it is often considered inorganic even though it contains carbon.

Inorganic carbon such as CO₂ differs from organic carbon because lack of hydrogen atom.

Organic molecules contain carbon and hydrogen, be given to be larger, presence of covalent bonds, and are non-electrolytes. Inorganic molecules made up of any substance that can't be classified as organic.

They are made up of hydrocarbons or carbon bonded to hydrogen. Because the C-H bond in carbon dioxide has lower bond energy than the carbon-oxygen bond, carbon dioxide (CO2) is more stable/less reactive than the typical organic compound.

They are made up of hydrocarbons or carbon bonded to hydrogen. However, it is not present in carbon dioxide, so it is not an organic compound.

Thus, CO₂ is often considered inorganic despite the fact that it contains carbon because it is a very simple molecule that lacks hydrogen.

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Answer: no water

Explanation:

Answer:

a substance that is a crystalline compound, contains no water

Answer and Explanation:

There are 7 base units, m is one of them. Any unit made up of a combination of them is a derived unit. Also, any unit that is defined to be equivalent to a combination of base units is a derived unit.

Kc, or the equilibrium constant, is the total sum of the concentrations of all the different species involved in a reversible process at equilibrium. The amount of a reaction at equilibrium is denoted by the constant K.

Consider the following equilibrium:

2a(g) - 2b(g) - c(g) a(g) e(g) > b(g) d(g)

k1 and k2 are the equilibrium constants for the reaction.

2d(g) - 2e(g)  c(g).

The explanation of the given statement is provided below.

The general equilibrium reaction is given as follows.

2a(g) + 2e(g) ⇌ 2b(g) + 2d(g) + c(g)

The given equilibrium is made up of two individual equilibria, with k1 and k2 as their corresponding equilibrium constants.

As a result, the overall equilibrium constant can be written as the product of the two equilibrium constants. 

Kc = K1K2 [c/2]

The above expression indicates that the equilibrium constant for the overall reaction is the product of the equilibrium constants for the two individual reactions.

Furthermore, the concentration of gas c is squared since its coefficient in the balanced equation is two.

Therefore, the correct option is (B).

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Answer:

trigonal pyramidal

Explanation:

In the case of water.

Answer:

D) lithium

Sodium Chloride is salt which is oviously present.

Oxygen is also present because fish use their gills to get oxygen from water.

Plants are present under ocean which release Carbon dioxide.

A chemical equation must balance according to the rule of conservation of mass. According to the rule, mass cannot be generated or removed during a chemical process. Here the balanced equation is 4NH₃+O₂ → 4NO+ 6H₂O.

A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides. In a balanced chemical equation, the mass and charge are both equal.

A  balanced chemical equation is one in which the number of atoms on each side (the reactant and product side) of the equation are equal. The law of conservation of mass states that when a chemical reaction takes place, the mass of the reactants and products should be equal.

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The mass of KHP needed to react completely with the given NaOH solution is 0.51 grams.

To calculate the mass of KHP (potassium hydrogen phthalate) needed to react completely with the given volume and concentration of NaOH solution, we can use the concept of stoichiometry and the balanced equation provided.

First, we need to determine the number of moles of NaOH using the equation:

moles of NaOH = volume of NaOH solution (in L) × concentration of NaOH (in mol/L)

moles of NaOH = 0.025 L × 0.10 mol/L = 0.0025 mol

Since the balanced equation shows a 1:1 stoichiometric ratio between NaOH and KHP, the number of moles of KHP required will also be 0.0025 mol.

Finally, we can calculate the mass of KHP using its molar mass:

mass of KHP = moles of KHP × molar mass of KHP

mass of KHP = 0.0025 mol × 204 g/mol = 0.51 g

Therefore, the mass of KHP needed to react completely with the given NaOH solution is 0.51 grams.

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The heat required to change 500 mL of water at 100°C to steam at 100°C is 1.13 ×10⁶J.

The latent heat can be defined as the amount of heat required during the phase change of a substance.

The mathematical formula for latent heat can be expressed as:

Q = mL

Given, the mass of water, m = 500 ml = 500 g

The change in temperature of the water, ΔT = 100 - 100 = 0

The latent heat of water, C = 2260 J/g

The  heat required to change the temperature of the water can be calculated as:

Q = m ×L

Q = 500 × 2260

Q = 1.13 ×10⁶J

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Answer:

The activation energy increases how quickly the reaction will  progress.

Explanation:

The activation energy of a chemical reaction is intimately linked to its rate. Particularly, the greater the activation energy, the slower the chemical reaction will be. The reason is: molecules can only finish the reaction as soon as they have reached the peak of the activation energy barrier. Many reactions possess such huge activation energies that they practically don't advance at all without an input of energy.

The activation energy of a particular reaction determines the rate at which it will proceed. The higher the activation energy, the slower the chemical reaction will be.

Answer: Aluminum Carbonate

Explanation:

Answer:

Aluminum carbonate.

Explanation:

It is an aluminum salt form of carbonic acid.

Answer:

sound waves, light waves, radio waves, microwaves and others

Explanation:

these waves have the same fundamental properties of reflection ,refraction, diffraction and interference, and all waves have a wavelength, frequency, speed and amplitude

Answer:

Cells are the basic building blocks of all living things.

The human body is composed of trillions of cells.

They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions.

Cells have many parts, each with a different function.

I hope it helps....

Answer: The standard potential is  -0.141 V

Explanation:

To calculate the Gibbs free energy for given value of equilibrium constant we use the relation:

\(\Delta G=-RTlnK\)

where,

= standard Gibbs free energy = ?

R = Gas constant = 8.314 J/Kmol

T = temperature = 298 K

K = equilibrium constant =

Putting values in above equation, we get:

\(\Delta G=40853J\)

Also \(\Delta G=-nFE^0\)

where n = no of electrons gained or lost = 3

F = Faradays constant = 96500 C

\(E^0\) = standard potential = ?

\(40853=3\times 96500\times E^0\)

\(E^0=-0.141V\)

Thus the standard potential is -0.141 V

Answer:

Electrons can have a measured radius.

Electrons do not have energy, the energy is determined by the orbit.

Explanation:

because I have got it right.

The correct answer is, "Electrons do not have energy, the energy is determined by the orbit."

In the Bohr model of the atom, electrons are arranged in energy levels. The energy of an electron is determined by the energy level in which it is found.

When electron an the  electron moves from a lower to a higher energy level it absorbs energy. When the electron moves from a higher to a lower energy level, it radiates energy. This energy is observed in the form of visible light.

Thus, in the Bohr's model, electrons are arranged in energy levels. The energy level where an electron is found determines its energy.

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Answer:

All can be charactoristics of a living thing

Explanation:

Answer:

Grow

Need energy

respond to stimuli

are made of cells

Explanation:

correct on edge 2022 :)

Increasing atomic radius can have a significant impact on the crystal structure of a material, affecting parameters such as interatomic distances, coordination numbers, lattice parameters, symmetry, and mechanical properties.

As the atomic radius increases, there are several effects on the crystal structure of a material:

1. Interatomic Distance: With increasing atomic radius, the average distance between neighboring atoms in a crystal lattice also increases. This leads to a larger unit cell and a decrease in atomic packing density.

2. Coordination Number: The coordination number refers to the number of atoms surrounding an atom in a crystal lattice. As the atomic radius increases, the coordination number may change. For example, a smaller atom might have a higher coordination number, while a larger atom might have a lower coordination number. This can influence the overall structure and stability of the crystal.

3. Lattice Parameters: The lattice parameters, such as the lattice constant or unit cell dimensions, may be affected by changes in atomic radius. An increase in atomic radius can result in an expansion of the crystal lattice, leading to changes in the lattice parameters.

4. Symmetry: Changes in atomic radius can affect the symmetry of the crystal structure. Larger atoms may disrupt the symmetry and introduce distortions or vacancies in the crystal lattice.

5. Mechanical Properties: The mechanical properties of a material, such as its strength, hardness, and flexibility, can be influenced by changes in atomic radius. Alterations in atomic size can affect the bonding forces between atoms and, consequently, the material's mechanical behavior.

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Name - Function

The brain regulates a variety of bodily processes, such as movement, sensation, thinking, emotion, and behavior.

Activity and Part of the brain it involves are:

a. Testing a hamburger - Sensory cortex in the parietal lobe

b. Artistic ability - Right hemisphere of the cerebrum

c. Kicking a soccer ball - Motor cortex in the frontal lobe

d. Rate of breathing - Medulla oblongata in the brainstem

e. Tying your shoes - Cerebellum

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The unknown acid is a weak: diprotic acid. The first pKa of the unknown acid is: 3.0, and the second pKa is: 5.0.

A substance that releases hydrogen ions in water is known as an acid. It has a pH of less than 7, which is the acidic range. Acids are the opposite of bases in chemistry, which release hydroxide ions when dissolved in water.The unknown acid is a weak diprotic acid.

pKa is the negative logarithm of the acid dissociation constant (Ka). It is a measure of the acidity of a molecule, with lower values indicating stronger acids. A pKa value of 3.0 corresponds to a weak acid.

A diprotic acid is a substance that has two hydrogen ions to donate when dissolved in water. The chemical formula for a diprotic acid is often written in the following way: H2A, with the acid donating two hydrogen ions to the water. A weak diprotic acid is an acid that does not fully dissociate in water.

The first pKa of the unknown acid is 3.0.

The second pKa of the unknown acid is 5.0.

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Fisherman's discovery is neither a theory nor a law as it cannot be supported by enough evidence.

Other people cannot reproduce the law or theory of the fisherman. Additionally, he does not disclose how many fish are captured every Wednesday.

Any phenomena or event that arises in the world on its own qualifies as a scientific law.

The occurrence occurs automatically and is visible to everyone.

A scientific law does not explain how or why something occurs. However, it mainly refers to guidelines for how nature will act in specific circumstances.

Principles or natural laws are other names for scientific laws.

Thus, the fisherman findings can't be proven and not applicable to nature, it can't be categorised as a scientific law or a theory.

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The volume of 0.500-M KOH(aq) should be added to 100 ml of a buffer solution initially containing 0.13 mol HF and 0.16 mol of NaF is 100 mL of 0.500 M KOH. ka = 6.8 × 10⁴ and pH is 3.59

given that :

ka = 6.8 × 10⁴

and pH is 3.59

moles of HF = 0.13 mol

moles of NaF = 0.16 mol

the pH formula is given as :

pH = pka + log [base]/[acid]

pH = -log(6.8 × 10⁻⁴) + log (0.16 ) / 0.13

pH =  3.33  + 0.0899

pH = 3.5

Thus, the volume of 0.500 M KOH should be added to a buffer solution 0.500 M.

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The balanced equation for the given redox reaction is:

2MnO4-(aq) + Zn(s) + 8H+(aq) → 2Mn2+(aq) + Zn2+(aq) + 4H2O(l)

The unbalanced redox reaction given is:

MnO4-(aq) + Zn(s) → Mn2+(aq) + Zn2+(aq)

In order to balance the redox reaction, we need to ensure that the number of atoms and charges on both sides of the equation are equal. Let's break down the reaction and balance it step by step.

First, let's balance the atoms other than oxygen and hydrogen. We have one manganese (Mn) atom on the left side and one on the right side, so the number of Mn atoms is already balanced. Similarly, we have one zinc (Zn) atom on each side, which is also balanced.

Next, let's balance the oxygen atoms. On the left side, we have four oxygen (O) atoms in the MnO4- ion, while on the right side, we have two oxygen atoms in the Mn2+ ion. To balance the oxygen atoms, we need to add two water (H2O) molecules on the right side.

Now, let's balance the hydrogen (H) atoms. On the left side, there are no hydrogen atoms, while on the right side, we have four hydrogen atoms in the two water molecules we added earlier. To balance the hydrogen atoms, we need to add four hydrogen ions (H+) on the left side.

Finally, let's balance the charges. On the left side, the overall charge is -1 from the MnO4- ion, while on the right side, the overall charge is +2 from the Mn2+ ion and +2 from the Zn2+ ion. To balance the charges, we need to add two electrons (e-) on the left side.

The balanced equation for the given redox reaction is:

2MnO4-(aq) + Zn(s) + 8H+(aq) → 2Mn2+(aq) + Zn2+(aq) + 4H2O(l)

In this balanced equation, both the number of atoms and charges are equal on both sides, satisfying the law of conservation of mass and charge.

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Answer:

0.56kg=?mg

0.56kg x (1000 g/1kg) X (1000mg/1g) = 560,000mg

Explanation:

You got it right. Great Job!

Answer:

Explanation:

The compound's molar mass is expressed in gram per mole, or g/mol.

One mole of a specific chemical or material has a mass of 1 molar. The compound's molar mass in the unit called gram per mole, or g/mol.

Avoid mixing up the terms molecular weight and molar mass of the material. The two are not equivalent. The atomic weight of each atom in a particular molecule adds up to make up the compound's mass, while the molar mass is the result of multiplying the molecule's weight by the number of moles in the compound.

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