Observe the nature changing around your home. You can observe plants, animals, and parts of your actual home as you begin to notice changes in matter. Collect data for two examples of changes in matter. Use the Changes in Matter observation questions to determine if your examples are physical or chemical changes.

Your answer should include two examples, the types of changes observed, and evidence of how the examples were formed. You can use this format:

Example 1:

Type of Change:

Evidence:

The factors for dissolving sugar.

Warmth or Fahrenheit minus 0.2 ranges Celsius dissolves the sugar in water. because of sugar's soluble nature, it's miles present at any temperature or stress in liquid water. about 10 mins for this.

Sugar dissolves quicker in hot water than it does in bloodless water due to the fact warm water has extra strength than bloodless water. whilst water is heated, the molecules benefit energy and, therefore, pass quicker. As they flow faster, they come into contact with the sugar more often, inflicting them to dissolve more quickly.

The dissolution of sugar in water is a bodily change because it no longer brings about the formation of a new substance. it's miles a reversible alternative as sugar and water may be extracted and returned from the solution through the method of crystallization observed by evaporation.

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The relationship between a transition element's group number and its valence electrons is that the valence electrons in transition elements are found in two different energy levels, which is because of the d-orbitals.

The group number of the transition element corresponds to the number of valence electrons. It is observed that a transition element always has two valence electrons. Valence electrons are located in the outermost shell of an atom. The amount of electrons in the outermost shell varies with the group of the transition element.  

Transition elements are known for their ability to form stable ions. Due to their incomplete d-orbitals, transition elements show variable valencies.

Their ability to have multiple oxidation states is due to the presence of electrons in the partially filled d-orbitals.

Valence electrons are responsible for determining the element's chemical properties, and therefore the number of valence electrons is also indicative of how an element interacts with others in chemical reactions.

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Explanation:

The covering of much of the Sahara desert by grasses, trees and lakes was caused bychanges in Earth's orbit around the Sun;changes in vegetation and dust in the Saharawhich strengthened the African monsoon; and increased greenhouse gases, which may imply that anthropogenic global warming could result in a shrinkage ...

Answer:

global warming ,.....

The mass number of the atom is 21, the atomic number is 9, and the element is Fluorine. There are 9 protons, 9 electrons, 12 neutrons, and the elemental symbol is F.

For every atom:

In the diagram:

Number of electrons = 9

Number of protons = 9

Number of neutrons = 12

Mass number = 12 + 9

                      = 21

Atomic number = number of protons

                         = 9

Element with atomic number 9 = Fluorine

Symbol of the element = F

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The given statement "When you flex your biceps, you are calling on the somatic sensory portion of the nervous system" is false because the somatic sensory portion of the nervous system is responsible for the detection of sensory information such as touch, pressure, temperature, and pain.

The somatic nervous system, which is responsible for voluntary movement, is made up of two parts: the somatic motor system and the autonomic nervous system. The somatic motor system controls skeletal muscles and is responsible for voluntary movements, such as flexing the biceps. The autonomic nervous system is responsible for involuntary functions such as heart rate, digestion, and breathing.

When you flex your biceps, you are activating the somatic motor system, specifically the motor neurons that control the muscles in your arm. The motor neurons send signals from the brain to the muscles, causing them to contract and produce movement.

Overall, while the somatic sensory portion of the nervous system is involved in sensing stimuli from the environment and transmitting that information to the brain, it is not directly involved in the voluntary movement of muscles.

The question was Incomplete, Find the full content below :

When you flex your biceps, you are calling on the somatic sensory portion of the nervous system. - True or False

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If we increase the concentration of NADH 8 decrease the concentration of NAD⁺; the the value of E will be increases.

Two electrodes comprise a galvanic cell or basic battery. The term "half cell" refers to each electrode in a galvanic cell. An oxidizing-reducing couple is created by the two half cells in a battery. An electrochemical reaction is triggered by joining two half cells together with an electric conductor and salt bridge.

Half cells:

Oxidation O₂ + 4H⁺ + 4e⁻ → 2H₂O

Reduction2x (NaDH → NAD⁺ + H⁺ + e⁻)

2 NADH + O₂ + 2H⁺ → 2NAD⁺ + 2H₂O (overall reaction)

E°= 0.815 v

E° = 0.320v

a) In the above equation

O₂² + 4H⁺ + 4e⁻ → 2H₂O⁻²

4 moles of elections are transferred to produce 2 mole of H₂O, for each 0₂

Change in oxidation number = 2-4

O₂ → 0 oxidation no.

2H₂0→2 Oxidation no. x 2

b) Electrochemical potential (E°cell)

E°cell = E° reduction -E° oxidation

E°cell = +0.815-(-0-320)

E°cell = 1.135 v

F = 96500

E = 1.135v

ΔG = -nFE°cell

ΔG = -4×96500×1.135

ΔG = 438.11 kJ/mol.

E = E-RT/nF In [NAD+] ²/[NADH]² [H]²

If we increase the concentration of NADH 8 decrease the concentration of NAD⁺; the the value of E will be increases.

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The value of Long Life Floors stock 5 years from today will be approximately $27.67 per share.

To calculate the value of the stock, we can use the dividend discount model (DDM). The DDM takes into account the present value of expected future dividends. In this case, the expected future dividends can be calculated by increasing the current dividend of $4 by 3 percent annually for five years. So, the expected dividends in five years would be $4 * (1 + 0.03)^5 = $4.62 per share.

Using a discount rate of 14 percent, we can calculate the present value of the expected future dividends. The formula for calculating the present value is: Present Value = Future Value / (1 + Discount Rate)^n, where n is the number of periods (in this case, 5 years).

Using the formula, the present value of the expected future dividends is: $4.62 / (1 + 0.14)^5 = $2.376 per share.

Therefore, the value of Long Life Floors stock 5 years from today is approximately $2.376 per share.

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The arrangement of the given elements in increasing order of atomic radius is F< P< Ge< Ga< Sr< Rb and in terms of decreasing first ionization energy is F> P> Ge> Ga> Sr> Rb.

A. Atomic radius refers to the distance from the center of an atom's nucleus to its outermost electrons.The atomic radius generally increases down the group as energy levels are added making each successive atom in a group larger. In moving across a period the atomic radius decreases because the nuclear charge increases as protons are added.

Thus, F has the smallest atomic radius among these elements whereas Rb has the largest.

B. Ionization energy is defined as the amount of energy needed to remove one electron from an atom in its gaseous state. It is a measure of how tightly or loosely an outermost electron is bound. Elements that readily give up electrons will have the lowest first ionization energy while those that hold their outermost electrons most strongly will have the highest first ionization energy. Down the group, ionisation energy decreases due to increase in the size of atom whereas along the period, ionization energy increases as it becomes difficult to remove an electron form the outermost shell due to decrease in the size of the atom.

Thus, here F has the highest first ionization energy whereas Rb has the lowest.

Therefore, increasing order of atomic radius is F< P< Ge< Ga< Sr< Rb and decreasing order of first ionization energy is F> P> Ge> Ga> Sr> Rb.

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Ten scientists, including Dalton, Thomson, Rutherford, Bohr, and Curie, contributed to the atomic theory through their groundbreaking discoveries and theories.

The atomic theory, our understanding of matter's fundamental building blocks, owes its development to numerous scientists. John Dalton proposed the modern atomic theory, while J.J. Thomson discovered the electron and suggested the "plum pudding" model. Ernest Rutherford's gold foil experiment revealed the atomic nucleus, and Niels Bohr expanded on this with the planetary model. James Chadwick discovered the neutron, Dimitri Mendeleev formulated the periodic table, and Marie Curie made significant contributions to radioactivity research. Werner Heisenberg and Erwin Schrödinger contributed to quantum mechanics, with Heisenberg formulating the uncertainty principle and Schrödinger developing wave equations.

Finally, Robert Millikan determined the electron's charge and mass through the oil-drop experiment. These ten scientists revolutionized our understanding of atoms and atomic structure, shaping the atomic theory as we know it today. Their discoveries and theories laid the foundation for further advancements in physics and paved the way for technological applications of atomic knowledge.

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Complete Question

Who are the 10 scientists that contributed to the atomic theory?

To find the moles present in 83.20 grams of manganese we must use the molar mass of manganese. This mass is equal to 54.94g/mol. So the moles of manganese (Mn) will be:

Answer: 83.20 grams of manganese are equivalent to 1.51 moles

2.592e+9. I looked it up on

Answer:

2592000000 Milliseconds

Explanation:

To calculate 30 Days to the corresponding value in Milliseconds, multiply the quantity in Days by 86400000 (conversion factor). In this case we should multiply 30 Days by 86400000 to get the equivalent result in Milliseconds:

30 Days x 86400000 = 2592000000 Milliseconds

I took it from https://whatisconvert.com/30-days-in-milliseconds

Answer:

Math like Science is Math combined with the calculations and all that stuff so

Explanation:

Scientific methodology includes the following: Objective observation: Measurement and data (possibly although not necessarily using mathematics as a tool)

Answer:

89-91=1 the answer is 1molar mass

2 Tipos de Energía Mecánica

2.1 1. Energía hidráulica

2.2 2. Energía eólica

2.3 3. Energía Mareomotriz

3 Ejemplos de Energía Mecánica

3.1 1. Planta hidroeléctrica

3.2 2. Máquinas de Vapor

3.3  3. Motor de Combustión interna

3.4 4. Molinos de Viento

3.5  5. Un Juego de Billar

3.6  6. Motor eléctrico

3.7  7. Locomotora

3.8  8. Bala

3.9 9. Una pistola de Dardos

3.10 10. Pelota sobre una mesa

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Both a reaction that uses oxygen and releases heat and light energy is respiration. Both a reaction in which plants absorb energy from the Sun is photosynthesis. Both a reaction carried out by cells that use oxygen and release energy is combustion reaction.

Respiration: glucose + oxygen → carbon dioxide + water + energy

The cellular respiration process produces ATP with the breakdown of the glucose and oxygen. During the process of respiration , carbon dioxide is formed along with water and energy.

Photosynthesis : water + carbon dioxide + sunlight → oxygen + glucose

Plants uses the light energy from the sun in the presence of water and carbon dioxide and forms food by the process of photosynthesis. It forms glucose and oxygen.

Combustion reaction: methane + oxygen → water + carbon dioxide + heat

Combustion reaction is a chemical reaction in which methane is the main substance. Combustion takes place as things burn in the presence of methane and oxygen to produce carbon dioxide, water and heat.

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Explanation:

Equation balanced:

2 H₂O -> 2 H₂ + O2

So if 1.97 mol of O2 is produced, it was needed 3.94 moles of H2O.

Let's transform to grams using the molar mass of water:

18 g --- 1 mol

x g --- 3.97 mol

x = 70.92 g

Answer: 70.92 g

The original volume of HBr that was titrated can be calculated as the ratio of the moles of HBr to its concentration.

To determine the original volume of HBr that was titrated, we can use the concept of stoichiometry and the equation balanced for the neutralization reaction between HBr and KOH.

The balanced equation is:

HBr + KOH → KBr + H₂O

From the balanced equation, we can see that the stoichiometric ratio between HBr and KOH is 1:1. This means that for every mole of HBr, we need an equal number of moles of KOH to complete neutralization.

First, let's determine the moles of KOH used in the titration:

Moles of KOH = 0.500 M × 0.075 L = 0.0375 mol

Since the stoichiometric ratio is 1:1, this also represents the number of moles of HBr that were neutralized.

Now, we can calculate the original volume of HBr using the concentration of the unknown solution:

Moles of HBr = 0.0375 mol

Concentration of HBr = unknown (let's assume it is C mol/L)

Volume of HBr = Moles of HBr / Concentration of HBr = 0.0375 mol / C mol/L

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Answer: C2H4 + 3O2  2CO2 + 2H2O

Explanation: Since the exact same amount of atoms is on both sides, no mass or matter is lost which agrees with the law of conservation of mass. This law states that The law of conservation of mass is that, in a closed or isolated system, matter cannot be created or destroyed. It can change forms but is conserved.

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Adhere to traffic regulations and guidelines throughout the process.

To design a traffic light system for an intersection using Multisim software and calculus, follow these steps. First, define the intersection and determine traffic flow. Next, establish the traffic light phases based on the traffic patterns. Use calculus to calculate the durations of each phase, considering factors like traffic volume and pedestrian crossing times. Create an optimization problem, setting an objective function to minimize delays and congestion.

Solve the optimization problem using calculus techniques and numerical methods. Implement the optimized timings in Multisim to simulate the traffic light system. Evaluate the simulation results, refine the timings if needed, and consider factors such as pedestrian safety and emergency vehicle prioritization. Adhere to traffic regulations and guidelines throughout the process.

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The approximate resistance value at 45 degrees Celsius is around 5.8 ohms.

To calculate the value of the resistance temperature coefficient at 45 degrees Celsius using linear approximation, we can use the formula:

R(T) = R0 + α(T - T0),

where R(T) is the resistance at temperature T, R0 is the resistance at a reference temperature T0, α is the resistance temperature coefficient, and (T - T0) is the temperature difference.

Given that the resistance at 25 degrees Celsius is 5 ohms (R0 = 5) and the resistance at 50 degrees Celsius is 6 ohms (R(T) = 6), we can calculate the value of α.

6 = 5 + α(50 - 25),

Simplifying the equation:

1 = 25α,

Therefore, α = 1/25 = 0.04 ohm/degree Celsius.

Using the linear approximation, we can approximate the value of the resistance at 45 degrees Celsius:

R(45) = 5 + 0.04(45 - 25) = 5 + 0.04(20) = 5 + 0.8 = 5.8 ohms.

Therefore, the value of the resistance at 45 degrees Celsius is approximately 5.8 ohms.

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A one-carbon alkyl substituent is called a methyl group, which is represented by the symbol CH3.

The name for a one-carbon alkyl substituent is a methyl group. A methyl group is the smallest alkyl group consisting of a carbon atom and three hydrogen atoms. It is represented by the symbol CH3 and is attached to a carbon chain by a single covalent bond.

The term alkyl refers to a type of organic molecule consisting of a hydrocarbon chain with one less hydrogen atom than its parent molecule. Therefore, the term "alkyl substituent" refers to a part of a molecule where one or more hydrogen atoms are replaced by an alkyl group.

Methyl groups are widely used in organic chemistry, biochemistry, and pharmacology. For example, they are found in many important molecules such as methane, methanol, and acetic acid. They can also be used to modify the properties of other molecules, such as in the synthesis of drugs and polymers.

In conclusion, a one-carbon alkyl substituent is called a methyl group, which is represented by the symbol CH3.

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The correct abbreviation for each metric unit is:

Kilogram - kg, Milliliter - ml, Kilometer- Km, Meter- m, Millimeter - mm, Centimeter - cm, Gram - g,  Liter - L, and Milligram - mg.

The metric system can be described as a system of measurement that succeeded the decimalized system based on the meter.  Each of the fundamental dimensions can be expressed by a single base unit of measure.

For quantities derived from the base units of the system, units derived from the base units are used such as the square meter being the derived unit for the area, a quantity derived from length.

Metric units can be described as units based on the meter, gram, or second and decimal multiples or sub-multiples of these. The units of the International System of Units (SI). By extension, they involve units of electromagnetism from the CGS units and SI units systems.

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Building blocks are the small units that make the larger, more complex molecule. The building block of protein is an amino acid and lipids are fatty acids and glycerols.

Proteins and lipids are the biomolecules that are involved in major reactions in the living system. They are composed of smaller subunits joined together by bonds.

Proteins are molecules made up of amino acids linked by the peptide bonds to form the chain of proteins that plays a crucial role in cell functioning.

Lipids are composed of fatty acids and glycerol linked by the ester bond, essential for the storage of energy and in the composition of the membranes.

Therefore, proteins are composed of amino acids and lipids of fatty acids and glycerol.

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Answer:

In the film version, they discover that he is still alive by noticing two things on the satellite imagery:

The Rover has been moved from where it was parked originally (prior to the evacuation)

The solar panels had been cleaned.

They also spotted tents attached to the hab for growing potatoes. In the film, the potatoes were grown completely inside the HAB, so no external tents would have been seen by the satellite.

A 2+ cation of a certain transition metal has six electrons in its outermost d subshell. This transition metal is Iron (Fe) .

To identify the transition metal with a 2+ cation having six electrons in its outermost d subshell, we need to understand the electron configuration of transition metals and their cations.
A transition metal is an element found in the d-block of the periodic table, and these metals are characterized by having partially filled d orbitals. The outermost d subshell refers to the d orbitals of the highest energy level in the electron configuration.
In this case, we're looking for a transition metal with a 2+ cation that has six electrons in its outermost d subshell. This means the neutral atom would have eight electrons in its outermost d subshell, as the 2+ cation loses two electrons.
The transition metal that fits this description is Iron (Fe), which has an atomic number of 26. Its electron configuration is [Ar] 4s2 3d6 for the neutral atom. When it forms a 2+ cation (Fe2+), it loses the two 4s electrons, resulting in the electron configuration [Ar] 3d6 (noble gas configuration) or 1s2 2s2 2p6 3s2 3p6 3d6 (electronic configuration) . This Fe2+ cation has six electrons in its outermost d subshell, making it the transition metal you are looking for.

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Two subatomic particles that would have a combined unit charge of 0 are d. electron, proton.

Both the electron and proton are subatomic particles, meaning they are smaller than an atom. The charge on a proton is exactly opposite in sign to the charge on an electron. The electron has a unit charge of -1, while the proton has a unit charge of +1. When these two particles are combined, their unit charges cancel each other out, resulting in a combined unit charge of 0.

Therefore, the correct answer is d. electron, proton.

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The mass ratio of copper per gram of chlorine in the two compounds is 2:1. The ratio is a small whole-number ratio. For a given mass of chlorine, compound A contains twice the mass of copper as does compound B.

For the given condition,

Compound A =4.08gCu and 2.28gCl

Compound B =7.53gCu and 8.40gCl

For each compound, find the grams of copper that combine with 1.00g of chlorine by dividing the mass of copper by the mass of chlorine. Then find the ratio of the masses of copper in the two compounds by dividing the larger value by the smaller value.

Compound A4.08gCu2.28gCl=1.79gCu1.00gCl

compound B7.asses of copper per gram of chlorine in the two samples.

1.79g Cu (in compound A)

0.896g Cu (in compound B) = 2.001=2:1

  Therefore, the mass ratio of copper per gram of chlorine in the two compounds is 2:1.

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