A piece of metal is composed of atoms. Each atom in the metal contains 29 protons. How is the metal classified?

The waves that  has the greatest wavelength is Wavelength shown with 1 wavelength stretched over a long distance.

A wave could be a disturbance or variety that voyages through a medium or space, carrying vitality without transporting matter. Waves can take different shapes and happen totally different sorts of waves, counting mechanical waves and electromagnetic waves.

Mechanical waves require a medium to propagate, meaning they require a substance like water, discuss, or a strong fabric to transmit the wave. Illustrations of mechanical waves incorporate water waves, sound waves, and seismic waves. In these waves, particles of the medium sway or vibrate in a design, exchanging energy from one molecule to another.

Electromagnetic waves, on the other hand, don't require a medium and can travel through vacuum, such as in space. Electromagnetic waves comprise of electric and attractive areas swaying opposite to each other and to the heading of wave engendering. Illustrations of electromagnetic waves incorporate obvious light, radio waves, microwaves, infrared waves, bright waves, X-rays, and gamma beams.

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In this letter, express gratitude to your uncle, a university professor, for his invitation and congratulate him on his achievements.

Here are the steps to be followed:

By following these steps, you can write a thoughtful and appreciative letter to your uncle, expressing your gratitude for his invitation and congratulating him on his achievements.

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Answer:

It forms a water cycle!

Hope it helps!!!

Ions can be made by single element or covalently bonded group of elements. The covalently bonded group of elements is called polyatomic ions or polyatomic atoms. The correct option are option A,C.

Any species that contain charge whether it is positive charge or negative charge is called ions. The example of polyatomic ions are sulfate, phosphate, nitrate etc.

Cation is the species that loose electron and attain positive charge while anion is a species which gain electron and attains negative charge so when anion and cation combine in fixed ration the the overall charge of the molecule is zero that is molecule is neutral, the charge over cation and anion is also called oxidation state.

Therefore the correct option are option A,C.

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Based on the given reactions, the compounds are as follows:

A: The specific product formed from the reaction between prop-1-yne and either 2HBr or H2O2.

B: The product formed when compound A reacts with 2H2O.

C: The product formed when compound B reacts with K2CO3(aq).

D: The product formed from the heat-induced reaction of compound C.

E: The product formed when compound D reacts with HBr.

Based on the given reactions, let's analyze the compounds involved:

Reaction 1: prop-1-yne + 2HBr/H2O2 = A

The reactant prop-1-yne reacts with either 2HBr or H2O2 to form compound A. The specific product formed will depend on the reaction conditions.

Reaction 2: A + 2H2O = B

Compound A reacts with 2H2O (water) to form compound B.

Reaction 3: B + K2CO3(aq) = C

Compound B reacts with K2CO3(aq) (potassium carbonate dissolved in water) to form compound C.

Reaction 4: C + heat = D

Compound C undergoes a heat-induced reaction to form compound D.

Reaction 5: D + HBr = E

Compound D reacts with HBr (hydrobromic acid) to form compound E.

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Answer:

the answer is a A

Explanation:

Answer:

Compare

Explanation:

Answer:

Ground state electronic configuration of oxygen atom is as follows -  is 1s2 2s2 2p2x 2p1y 2p1z 1s2 2s2 2px2 2py1 2pz1

Ground state electronic configuration of hydrogen atom is 1s1 1s1

Explanation:

As per the Valence Bond Theory (VBT),

Ground state electronic configuration of oxygen atom is as follows -  is 1s2 2s2 2p2x 2p1y 2p1z 1s2 2s2 2px2 2py1 2pz1

Ground state electronic configuration of hydrogen atom is 1s1 1s1

Considering the electronic configuration, H-O-H bond angle would be at 90 degrees as  2py2py and 2pz2pz are oriented 90° with respect to each other. But if the oxygen atomic orbitals is used directly then bond angle for water is 104.45° as per the VSEPR theory which states that 2s2s spherical orbit in oxygen can adjust the bond angle by creating new hybrid orbitals

Answer:

(B.) and (C.)

b. So that clean NMR spectra can be obtained that do not contain solvent peaks.

c. So that the yield can be determined.

Explanation:

The solvent used in Nuclear Magnetic Resonance (NMR) spectrometer is Trimethyl silane (TMS), a neutral solvent which doesn't give off any signals. Other solvents could have interactions with the radiation, and disrupt the spectra.

Furthermore, for accurate determination of the actual yield and overall percentage yield, solid must be separated from the solvent, dried and weighed.

I hope this was explanatory enough.

Answer:

32.52×10¹⁹ atoms

Explanation:

Given data:

Mass of gold = 0.106 g

Number of atoms of gold = ?

Solution:

We will calculate the number of moles first.

Number of moles = mass/molar mass

Number of moles = 0.106 g/ 197 g/mol

Number of moles = 5.4×10⁻⁴ mol

Number of atoms:

1 mole contain 6.022×10²³ atoms

5.4×10⁻⁴ mol ×  6.022×10²³ atoms /1 mol

32.52×10¹⁹ atoms

When comparing various liquids, a liquid can be recognized by its behavior on paper, which is a defining attribute of the liquid.

On two distinct paper surfaces, we will test four known liquids and an unknown liquid. we will identify an unidentified liquid using their observations. We will learn that we can effectively identify an unidentified liquid by combining the findings of two experiments. On a coffee filter dipped in green food coloring, we will also add water and salt water. we can tell a big difference in how each liquid separates the hues of the green food coloring. When comparing various liquids, a liquid can be recognized by its behavior on paper, which is a defining attribute of the liquid. The equal quantity of each liquid should be applied to the paper in the same location for the test to be fair.

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Answer:

Alcohol?

Explanation:

(for Plato)

Answer:

2,6 dimethyl heptene

I hope it's helps you

In order to promote a healthy environment, the piece of trash should be matched to the best method of disposing them as follows:

Compost rotting can be defined as a chemical change that involves the mixture of decayed organic substances such as dead leaves, vegetables, manure, or egg shells, that are added to the soil, in order to fertilize it.

Recycling can be defined as a waste (trash) management technique that involves the process of converting a raw material that has reached the end of its life cycle into new and reusable items.

In order to promote a healthy environment, the piece of trash should be matched to the best method of disposing them as follows:

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Answer:

Recycling - television set, plastic milk bottle, and soup can.

Compost - egg shell, vegetable peel, and grass clippings.

Explanation:

Plato

Answer:

The answer is YES

The value is \(S = 110 \ g/L\)

Explanation:

From the question we are told that

The volume of the sample taken is v = 13.0 mL

The temperature is \(T = 16^oC\)

The mass of the sample is \(m = 0.143 g\)

Generally the solubility of the substance X is mathematically represented as

\(S = \frac{m}{V}\)

=>        \(S =  \frac{0.143  }{13.0}\)

=>         \(S = 0.011 \  g/mL\)

=>         \(S = 110 \  g/L\)

Answer:

i think your answer is element BUT I'm not sure if I understand the question because CaCl2 is also a compound

Explanation:

because Ca and Cl are elements

The equilibrium constant for the reaction is 0.0052.

Here are the steps to calculate the equilibrium constant for the reaction:

Write the equilibrium constant expression. The equilibrium constant expression for the reaction is:

K = \([SO3]^2 / [SO2]^2 * [O2]\)

Calculate the equilibrium concentrations of the reactants and products. The equilibrium concentration of oxygen is given as 0.25 mol.dm^3.

One can compute the equilibrium concentration of sulfur dioxide by applying the subsequent formula:

.

\([SO2] = (10 mol - 2 * 0.25 mol) / 2 dm^3 = 4.5 mol.dm^3\)

The equilibrium concentration of sulfur trioxide can be calculated using the following equation:

\([SO3] = (2 * 0.25 mol) / 2 dm^3 = 0.5 mol.dm^3\)

Substitute the equilibrium concentrations into the equilibrium constant expression and solve for K.

K = \((0.5 mol.dm^3)^2 / (4.5 mol.dm^3)^2 * (0.25 mol.dm^3)= 0.0052\)

Therefore, the equilibrium constant for the reaction is 0.0052.

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Answer: To be valid, experiments must be able to be repeated by other scientists.

Answer:

Answer is C) To be valid, experiments must be able to be repeated by other scientists.

Explanation:

Answer: 1:7

Explanation: 2 Tc^+7 + 7 O2^-2 -> Tc2 (O2)7

Also 2 Tc to 14 O

Lithium weighs 5. 5.00 grams and has the most moles.

Wilhelm Ostwald, a German chemist, is typically credited with coining the term. The Latin term moles, which meaning "a mass," is ultimately where the word mole originates, not from German. Because it is the diminutive and refers to "a little bulk," the word molecule is connected to the word mole.

A mole is equivalent to 6.023 x 1023 of any given substance (Avagadro number). The products of the chemical reaction can be measured using it. The number of moles per liter is the most often used unit for measuring molarity and is denoted by the unit symbol mole/L or moledm3 in SI units. The term molar often known as "1 M," refers to a solution with a concentration of 1 mole/L.

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As per the standard data, the heat evolved during one mole of calcium carbonate decomposes is 177.8 KJ. Thus 15 g or 0.15 moles of calcium carbonate when decomposed will produce 26.67 KJ of heat.

Reaction enthalpy of a substance is the heat evolved or absorbed during a reaction. Reaction enthalpy is negative for an exothermic reaction and positive for an endothermic reaction.

Molar mass of calcium carbonate = 100 g.

no.of moles in 15 g = 15 /100 = 0.15 moles.

One mole or 100 g of calcium carbonate decompose to evolve 177.8 KJ according to the scientific record.

Thus, heat evolved by the decomposition of 0.15 moles is 0.15 × 177.8 KJ = 26.67 KJ.

Hence, the heat evolved during the decomposition of 15 g of calcium carbonate is 26.67 KJ.

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Answer:

4

Explanation:

please mark brainiest

K(s) + 2HCl(aq) ----> 2KCl (aq) +H2(g) is an example of single replacement reactions.

A single-displacement reaction, also known as single replacement reaction or exchange reaction, is a chemical reaction in which one element is replaced by another in a compound.

Single-replacement reactions always involve two pure elements and one aqueous compound/solution. In the above reaction, the A and C would be pure elements.

A single replacement reaction, sometimes called a single displacement reaction, is a reaction in which one element is substituted for another element in a compound.

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What causes the changes in the ice ages is when the earth's orbits tilts.

The ice ages are caused by changes in Earth's orbit and tilt, which affect the amount of solar radiation received by the planet. These changes alter the climate and trigger the growth and retreat of ice sheets.

We know that the changes in the climates is responsible for most of the changes that we can see in the universe as we have come to experience it today.

Thus the earth's orbits is what does control the changes in the ice ages.

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Answer:

The percentage of IF₅ (by mole) in the final product mixture will be 50%. This is determined by the stoichiometry of the reaction, the given molar mass of the reactants, and the ideal gas law.

Explanation:

Answer:

physical projects

Journal entries

Materials

Lab reports

Artworks

Explanation:

Definition of a Portfolio:

Portfolio can be defined as a physical collection of student work that includes materials such as written assignments, completed tests, artwork, lab reports, physical projects and other material evidence of learning progress and academic accomplishment, including awards and honors,

A portfolio is a long-term form of self reflection and assessment that students do together.

Portfolios are a great way to demonstrate the competencies you would list on a resume or talk about in a science interview

Answer:

A)566×10^-16J

B)711.99×10^-16J

C)688.69×10^-12J

Explanation:

A)

But we know that

1 nm = 10^-9 m

Then we can Convert from nanometer to metre which is SI unit

632.8 nm = 632.8×10^-9 m = 6.328×10^-7 m

The speed of light is c = 2.998×10^8 m/s

λ = 6.328×10^-7 m

But the frequency can be calculated as;

ƒ = c / λ

ƒ = (2.998×10^8 m/s) / (6.328×10^-7 m)

Then

ƒ = 4.738×10^14 s-1

To calculate Energy we use

Energy= hf

Where h is plank constant= 6.626× 10^-34

Energy= 6.626× 10^-34 × 4.738×10^14=566×10^-16J

B)

But we know that

1 nm = 10^-9 m

Then we can Convert from nanometer to metre which is SI unit

Then 503 nm = 503×10^-9 m = 5.03×10^-7 m

c = 2.998×10^8 m/s

λ = 5.03×10^-7 m

But the frequency can be calculated as;

ƒ = c / λ

ƒ = (2.998×10^8 m/s) / (5.03×10^-7 m)

ƒ = 5.960×10^14 s-1

Energy= 6.626× 10^-34 × 5.960×10^14 s-1= 711.99×10^-16J

C)

1 nm = 10^-9 m

0.0520 nm = 0.0520×10^-9 m = 5.20×10^-11 m

Where the speed of light is

c = 2.998×10^8 m/s

λ = 5.20×10^-11 m

But the frequency can be calculated as;

ƒ = c / λ

ƒ = (2.998×10^8 m/s) / (5.20×10^-11 m)

ƒ = 5.765×10^18 s-1

Energy= 6.626× 10^-34 × 5.765×10^18 s-1= 688.69×10^-12J

Answer:

motor oil

Explanation:

According to Oxford dictionary, viscosity refers to ''a quantity expressing the magnitude of internal friction in a fluid, as measured by the force per unit area resisting uniform flow.''

The higher the molecular weight of a substance, the greater its viscosity. This is because, the long chains in the viscous substance become entangled thereby increasing the internal friction in the liquid.

Motor oil is a heavier hydrocarbon than gasoline hence it is more viscous than gasoline.

Answer:

Motor oil

Heat it

Water

Explanation:

Answer:

Peptide Bonds

Explanation:

Peptide bonds are formed by a biochemical reaction that extracts a water molecule as it joins the amino group of one amino acid to the carboxyl group of a neighboring amino acid.

Answer: 20.9 billion years.

Explanation: To estimate the age of the rock, we can use the fact that the half-life of uranium-238 is 4.47 billion years. This means that half of the uranium-238 in the rock would have decayed into lead-206 after 4.47 billion years, and half of what remains would decay in the next 4.47 billion years, and so on.

If 20% of the uranium-238 in the rock has decayed into lead-206, then 80% of the original uranium-238 is still present in the rock. This means that the rock has gone through one half-life of uranium-238 decay, and we can estimate its age by using the graph on page 253.

According to the graph, the ratio of lead-206 to uranium-238 after one half-life is approximately 0.027. This means that the rock contains 0.027 times as much uranium-238 as it did originally, and the remaining 80% of the uranium-238 corresponds to 0.8 times the original amount.

Therefore, we can estimate the original amount of uranium-238 in the rock as follows:

Original amount of uranium-238 = (0.8) / 0.027 = 29.63 times the current amount

Next, we can use the fact that each half-life corresponds to a reduction in the amount of uranium-238 by a factor of 2, to estimate the number of half-lives that have passed since the rock formed:

Number of half-lives = log2(29.63) = 4.88

Finally, we can estimate the age of the rock as follows:

Age of the rock = (4.88) x (4.47 billion years per half-life) = 20.9 billion years

Therefore, we can estimate that the age of the rock is approximately 20.9 billion years.

The correct answer is d. None of the above, as the total mass and force of gravity do not change, while the total energy does change during energy conversions.

When energy is converted from one form to another in a chemical or physical change, the total mass in the system does not change. According to the law of conservation of mass, mass is neither created nor destroyed during a chemical or physical process. Therefore, the total mass in the system remains constant. Similarly, the force of gravity does not change during energy conversion. Gravity is a fundamental force that acts on objects with mass and is independent of the energy transformations occurring in the system. The force of gravity is determined by the masses of the objects involved and their distance from each other, but it is not influenced by energy conversions. The total energy in the system does change during energy conversions. Energy can be transferred or transformed from one form to another, but the total energy within a closed system is conserved according to the law of conservation of energy. The amount and type of energy may vary, but the total energy content remains constant. Therefore, the correct answer is d. None of the above, as the total mass and force of gravity do not change, while the total energy does change during energy conversions.

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