HELP ASAP PLEASE PLEASE PLEASE Complete and balance the following reaction. Note that Cr forms +3 in the product. ____ Sn(NO3)2 (aq) + ____ Cr(s) → ____ _________ ( ) + ___ _________( ) b) How do the oxidation states of Sn and Cr change during the reaction? Sn changes from ___ to ____ and Cr changes from ____ to ____ c) Determine the net ionic equation including phases. d) Identify the oxidizing and reducing agents (give formula of compound, ion or element): OA = _____ RA = _____ e) Write the oxidation half rxn.

Answer:

Billions

Explanation:

A full stop contains almost trillion of atoms.

Billions of atoms would it take to make a stack as thick as a potato chip. Hence, option C is correct.

An atom consists of a central nucleus that is usually surrounded by one or more electrons.

Billions of atoms would it take to make a stack as thick as a potato chip. Hence, option C is correct.

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Answer:

D

Explanation:

metal is a major cunductor of heat

A cup made of metal would have the best thermal conductor properties.

The answer is option D.

Metals have unfastened electrons that are not bounded to the atoms. those electrons are unfastened to move around within the metal, colliding with the metal atoms and shifting heat to them successfully. This makes metals higher conductors of warmth than maximum other materials.

Diamond is the leading thermally conductive material and has conductivity values measured 5x better than copper, the maximum synthetic metallic inside the united states of America. Diamond atoms are composed of a simple carbon spine this is a really perfect molecular structure for an effective heat switch.

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Answer:

D. The kinetic energy will increase

Explanation:

Answer:

Hello

I think the third one is correct.

Explanation:

Because when we increase the temperature of a gas the increasing give energy to gas molecules.

Good luck.

Answer:

The correct answer is C. Hund's rule.

Hund's rule states that for atoms in their ground state, electrons will occupy orbitals of the same energy level one by one before pairing up. This means that when filling the 3p sublevel, phosphorus should have one electron in each of the three 3p orbitals before any of them start pairing up.

However, in reality, sulfur has a lower ionization energy than phosphorus. This means that it is easier to remove an electron from sulfur than from phosphorus. This contradicts the expectation based on Hund's rule.

Therefore, the fact that sulfur has a lower ionization energy than phosphorus provides evidence that Hund's rule is not the only factor governing the electron configuration and ionization energies of elements. Other factors, such as electron-electron repulsion and the stability of half-filled or filled subshells, also play a role.

Answer:

The answer is C

Explanation:

Because when cells are damaged, your body will make new cells  to get rid of damaged cells and if you don't, it can become cancerous. For example, if a damaged cell isn't removed, then it might reproduce agian and then you will have sickly cells or cancerous cells.

A significant contribution that Lavoisier made to chemistry is that he was the first to propose the atomic theory that is in Option C, the atomic theory was critical for understanding and studying atoms.

His contribution is significant because he made significant contributions to the fields of chemistry and biology, such as the discovery of oxygen, and also gave the concept of conservation of mass of the atoms, which is why he is known as the "Father of Modern Chemistry," as well as he is well known for his experimentation and precise measurement.

Hence, a significant contribution that Lavoisier made to chemistry is that he was the first to propose the atomic theory that is in Option C, the atomic theory was critical for understanding and studying atoms.

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Answer:

the answer is Cold climates favor mechanical weathering.

Explanation:

I got 100% on the Quiz

Statement that describes climate effect on the rate of weathering as regards this question is A:Cold climates favor mechanical weathering.

Option B,C,D are wrong because high temperature brings about increase in rate of chemical weathering.

Therefore, option A is correct.

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Answer:

the epigenetic perspective. ... Such variation among organisms with virtually identical chromosomal DNA sequences has largely been attributed to the effects of environment.Explanation:

Answer:

As a general rule, soluble ionic compounds, strong acids, and strong bases should be written as dissociated ions in the complete ionic equation. Insoluble salts and weak acids are written using the neutral molecular formula since they only dissociate to a very small extent in water.

Explanation:

Answer:

Atoms of different elements, having gained or lost electrons, form negative and positive ions that are bonded together by attractive forces between ions with opposite charges.

Explanation:

The atoms have different numbers of neutrons and the same number of protons. hope this helps you :)

Answer:

B.

Explanation:

To solve this we must be knowing each and every concept related to  phase diagram. Therefore, the correct option is option B among all the given options.

A phase diagram is a graphic that depicts a substance's thermodynamic state at various pressures and temperatures. The areas surrounding the lines represent the phase of both the material, and the lines represent the points at which the phases are all in equilibrium.

A phase diagram often contains lines of equilibrium and phase boundaries. Multiple phases like matter can exist in equilibrium along these lines. The lines also illustrate the locations of phase transitions. Phase diagram tells about the effect of temperature and pressure on the phase of a substance.

Therefore, the correct option is option B among all the given options.

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Answer:

Salty water is more dens than freshwater. answer is D

Explanation:

The statement which accurately describes the transmission of sound and waves in seawater that sound travels faster in seawater because seawater is more dense than the atmosphere.

Sound wave is an example of longitudinal wave. It always travel through any medium as it requires some objects to transfer its energy.

Travelling of sound waves is directly depends on the vibration of the particles of the medium and in seawater particles of the water in the form of salt are present in much amount which makes it dense. And due to dense medium sound waves will travel through seawater through the fast speed.

Hence, sound travels faster in seawater because seawater is more dense than the atmosphere.

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Answer:

A. mol/kg

Explanation:

hope it helps .

Answer:

B is the correct option

Explanation:

K= the ratio of product of concentration of products to the product of concentration of reactants raised to power equal to their cofficients.

Answer:

aaaaa

Explanation:aaaaaaa

the other guy is totally wrong. the answer is a for sure. C is showing a covalent bond between 3 atoms. Metals bond differently. Like shown in a and b. However b is innacurate because it shows the electrons being the largest(since they are negatively charged and there is a - sybmol), and we all know protons are much larger than electrons. SO a is correct because it depicts the positive protons(+ symbol) as the biggest. So go with a.

Answer:

The subsrance that increases OH ion concentration.

Explanation:

Answer:

A

Explanation:

It seems most appropriate since it's the transfer of heat in fluids including air

Heat is meant to be transferred by convection as energy is transferred through moving currents of warmer air or liquid which is in option a as  it involves the transfer of thermal energy through the movement of a fluid.

In convection process, the warmer regions of the fluid or liquid become less dense, which is causing them to rise. As the warmer fluid rises, it carries thermal energy with it as its properties change. while, the cooler regions of the fluid became denser, and that led to sink. This creates a continuous circulation of the fluid, which helps to distribute the heat in the area.

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Answer:

18.76 g of copper II nitrate

Explanation:

Now recall that we must use the formula;

n= CV

Where;

n= number of moles of copper II nitrate solid

C= concentration of copper II nitrate solution

V= volume of copper II nitrate solution

Note that;

n= m/M

Where;

m= mass of solid copper II nitrate

M= molar mass of copper II nitrate

Thus;

m/M= CV

C= 0.05 M

V= 2.00 L

M= 187.56 g/mol

m= the unknown

Substituting values;

m/ 187.56 g/mol = 0.05 M × 2.00 L

m= 0.05 M × 2.00 L × 187.56 g/mol

m= 18.76 g of copper II nitrate

Therefore, 18.76 g of copper II nitrate is required to make 0.05 M solution of copper II nitrate in 2.00 L volume.

Answer:

B. The region outside a nucleus where the electron is moving

Explanation:

The more the electron moves, the higher energy level it has, the slower the electron moves the lowwer energy level it has.

Answer:

Energy levels (also called electron shells) are fixed distances from the nucleus of an atom where electrons may be found. Electrons are tiny, negatively charged particles in an atom that move around the positive nucleus at the center. Energy levels are a little like the steps of a staircase. You can stand on one step or another but not in between the steps. The same goes for electrons. They can occupy one energy level or another but not the space between energy levels.

:D

Answer:

-1.76201864

Explanation:

0.00325136 - 1.76527 = 1.76201864

The concept of significant figures are mainly used by scientist and engineer to know the significance of digits in a measurement. Therefore, -1.76201 is the value on applying mathematical operation.

Significant figures are the figures that indicate the degree of accuracy of a value. It tells about the precision of a value. It gives an idea about the digits that are necessary to indicate the experimental value.

Rules for counting significant figures are:

Number between 1 to 9 is always significant

Zeroes after a number has got no significance

Zeroes before a number has got no significance

Zeroes between number has got significance

0.00325136 - 1.76527

= -1.76201

Therefore, -1.76201 is the value on applying mathematical operation.

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Answer:

A. A method of testing an idea

Explanation:

The steps of the scientific process involve formulating a hypothesis, testing it, analysing the data, making conclusions, and reporting the findings.

Answer:  Charlotte, because baking causes a chemical change, but melting objects is a non-chemical change.

Explanation: Baking is a chemical change you cant turn it back to what it was before. Its chemical properties have changed. Melting is a physical change. Its chemical properties are still the same it has not changed. It just changed it's physical form but the object is still the object.

Answer:

Charlotte, because baking causes a chemical change, but melting objects is a non-chemical change.

Explanation:

took the quiz on edge

Answer:

A. Polar covalent  

Explanation:

The polarity of a bond depends on the electronegativity difference (ΔEN) between the bonded atoms.

If the electronegativity difference between the atoms is between 0.4 and 1.7, the bond is polar covalent.

For an N-H bond, ΔEN = |3.04-2.20| = 0.84

So, the bond is polar covalent.

B is wrong. A bond is ionic only if ΔEN > 1.6.

C is wrong. A bond is nonpolar only if ΔEN < 0.4.

D is wrong. N and H are not metals.

Answer:C.people with perfect understanding of science.

Answer:

C. People with perfect understanding of science

Explanation:

Similar personalities, different backgrounds, and only one perspective are just traits of people.

Perfect understanding of science is relating to a scientist. Scientists have high knowledge of science.

Answer:

The answer is option D.

A weakly basic solution

Hope this helps.

Answer:

Explanation: Apex a weakly acidic solution

Answer:

As you go across a period, radius shrinks because you are adding protons. The added positive charge increases pull on the electron shells. So I believe the answer is D

The statement, that describes the atomic radius change down a column of the periodic table is "the larger the highest energy level number, the larger the atomic radius."

The size of an atom is described by its atomic radius. Atomic radius is commonly defined as the total distance from an atom's nucleus to the electron's outermost orbital.

The atomic radii of elements steadily grow from top to bottom in a group. As we move down the group, the atomic number rises, and so does the number of shells. Furthermore, as we advance down the group, the valence electrons are present in a higher shell, increasing the distance of the valence electrons from the nucleus. As a result, the attraction between the nucleus and the valence electron weakens. When a result, as one moves along a group, the atomic radius grows.

As the number of energy levels (n) decreases down a group, the distance between the nucleus and the outermost orbital rises. As a result, the atomic radius increases.

Hence, the correct option is D.

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Answer:

Molecules are speeding up as boiling occurs.

Explanation:

We have three states of matter;solid liquid and gas. Substances are found in these different states of matter according to the degree of energy and velocity of its particles. Highly energetic particles moving at high velocities are found in the gaseous state. Less energetic particles moving at lesser velocities due to intermolecular forces are found in the liquid state while particles with the least degree of freedom are found in the solid state. Solid particles do not translate but can vibrate or rotate about a fixed position.

When a liquid boils, particles at the surface of the liquid acquire sufficient energy and escape the surface of the liquid. This is because, as energy is supplied in the form of heat during boiling, molecules acquire sufficient energy to speed up their molecular motion and escape the liquid surface as vapour.

Molecules are speeding up as boiling occurs is the statement that best describes the process of arrow 1.

Evaporation is a physical process in which matter transforms from a liquid state to a gaseous state. Generally this process occurs when matter is exposed to high amounts of energy.

When a material is exposed to energy, its particles begin to move and speed up until they break their bonds and are released in the form of gas.

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