Which statement best describes a chemical property of Iron?

A: Iron can be flattened into sheets

B: Iron conducts electricity and heat

C: Iron combines with oxygen to form rust

D: Iron can be made into a wire

The two ways in which the physical state of matter can be changed are melting and freezing.

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The mass of the 65Cu isotope can be determined using the formula below. - To obtain the mass of the 65Cu isotope, replace all the known values in the formula above. - The mass of the 65Cu isotope is therefore 64.9233 amu. So, "Option C" is the right response.

Average atomic mass of copper=63.546 amu

On putting given values we get:

63.546= 100

62.9298 ×69.09+M

2 ×30.91

on solving we will get mass of  65

Cu isotope =64.9233

The total mass of an atom is made up of all of its protons and neutrons.

"Isotopes" is the name used to describe atoms having differing atomic weights caused by various neutron counts. The protons in isotope elements are the same, but the neutron content varies.

The total mass of the protons and neutrons in an atom's nucleus is known as its atomic mass. With 6 protons and 7 neutrons in its nucleus, this carbon isotope has a 13-atom mass, or 7+6=6. It has an atomic mass of 13 mass units. (amu).

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The potential energy of the flake when it reaches the bottom, assuming it is taken to be zero at the release point, will be equal to its total mechanical energy.

When the potential energy is taken to be zero at the release point, it means that all the potential energy is converted into other forms of energy as the flake descends. At the release point, the flake has potential energy due to its position above the bottom.

As it falls, this potential energy is gradually converted into kinetic energy, which is the energy associated with motion. At the bottom, when the flake comes to a stop, all of its potential energy has been converted into kinetic energy, resulting in a total mechanical energy of zero.

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Answer:

The correct options is;

C. Babylonians

Explanation:

The Babylonians showed to have had knowledge that the Evening Star, which is the appearance of the planet Venus in the west, after sunset and the Morning Star which is the bright, white object that can be seen early in the morning in the Eastern sky are one and the same object as indicated in the middle of the seventeenth century BCE compiled Venus tablet of Ammisaduga.

Answer:

B: Inverse

Explanation:

When the estrogen to progesterone ratio is high, cilia of the isthmus beat towards the uterus. This is because estrogen is known to stimulate the cilia to beat in a coordinated and rhythmic fashion, creating a flow that moves the egg towards the uterus. On the other hand, progesterone is known to inhibit the ciliary beating and relax the muscle contractions of the fallopian tubes, creating an environment that is conducive for implantation of a fertilized egg.

The movement of the cilia towards the uterus is essential for successful fertilization and implantation. If the cilia are not beating in the right direction, the egg may not reach the uterus in time, or it may not be properly fertilized. This can lead to fertility issues and difficulties with conception.

Overall, the balance between estrogen and progesterone plays a critical role in regulating the movement of the cilia in the isthmus, ensuring successful fertilization and implantation of a fertilized egg. Therefore, it is important to maintain a healthy hormonal balance to support reproductive health.

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Answer:

4383.28 g

Explanation:

First we'll need to convert molecules into moles, we can do so using Avogadro's number:

Then we will convert 99.62 moles of carbon dioxide (CO₂) into grams, using its molar mass:

Answer:0.284ib/in 3

Explanation:

\(\text{Given that,}\\\\\text{Density of iron, }~ \rho = 7 ~\text{g cm}^{-3} = 7 \times 10^{3}~ \text{kg m}^{-3}\\\\\\\text{Mass, m =14 g =} ~ 14 \times 10^{-3} ~\text{kg}\\\\\\\text{Volume of iron,}~ V = \dfrac{m}{\rho} = \dfrac{14 \times 10^{-3}}{7\times 10^{3}} = 2 \times 10^{-6} ~~ m^3\)

Answer:

B, C, and D are fluids.

Explanation:

When steel and zinc were connected, zinc is the cathode. The term cathode refers to the electrode that is reduced during an electrochemical reaction.

The electrons are moved from the anode to the cathode during an electrochemical reaction in order to maintain a current in the wire that links the two electrodes.

According to the galvanic series, zinc is more active than iron, meaning that it is more likely to lose electrons and be oxidized. As a result, when steel and zinc are connected, zinc will act as the anode and lose electrons, whereas iron (steel) will act as the cathode and receive the electrons transferred by zinc.

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Answer:

C) creating a relationship between mass and volume

g/L

g or gram is mass

L or Litres is for volume

Answer:

Chlorine is more likely to steal a valence electron from sodium.

Explanation:

Sodium is number 11 on the periodic table with one valence electron. Belonging to the first group, it's one of the alkali metal, which are known to be highly reactive. Chlorine is number 17 with seven valence electrons, and it's in the second-to-last group of halogens--also very reactive.

Considering that elements with one valence electron are just about 100% likely to give up electrons to reach a stable state, sodium would be the element that is more likely to lose its valence electron to chlorine. In other words, chlorine would be the electron thief.

Answer:

m= 0.20 Kg

Explanation:

Given: F = 6 J, a = 3 m

To find: What is  the mass of the apple?

Formula: \(m=\frac{2KE}{v^2}\)

Solution: Newtons are derived units, equal to 1 kg-m/s². In other words, a single Newton is equal to the force needed to accelerate one kilogram one meter per second squared.

M = F ÷ a

F = 6 kg ÷ 3 m/s2

F = 2 N

PE = mgh 6 J= (3m) (9.8 m/s2²) (__m) m= 0.20 Kg

Answer:

C2H6 OR C6H12O6 THE ANSWER

Explanation:

C2H6

!!!!!!!!!!

because it has both hydrogen and carbon as given in the word "Hydro-carbon"

Answer:

The correct option is;

By first reversing Reaction 2 and then adding the enthalpy of Reaction 1 and the enthalpy of reaction 2

Explanation:

The given reactions are;

1) C₂H₂ (g) +  2H₂ (g)  → C₂H₆ (g)     \({}\)      ΔH = -75 kcal

2) C₂H₄ (g) +  H₂ (g)  → C₂H₆ (g)     \({}\)      ΔH = -33 kcal

3) C₂H₂ (g) +  H₂ (g)  → C₂H₄ (g)     \({}\)      ΔH = ?

By reversing reaction (2) and subtracting the reactants from the products we then have followed by adding the enthalpy of reaction 1 to the value of the enthalpy of the (reversed) reaction 2, we have;

C₂H₂ (g) + 2H₂ (g)  → C₂H₆ (g)     \({}\)      ΔH = -75 kcal

C₂H₆ (g) → C₂H₄ (g) + H₂ (g)       \({}\)       ΔH = 33kcal

Adding, and cancelling out the italicized terms which are repeated in the product and reactants, we get

C₂H₂ (g) + H₂ (g) → C₂H₄ (g)       \({}\)   ΔH = -75 kcal + 33 kcal = -42 kcal

Therefore, the correct option is "by first reversing Reaction 2 and then adding the enthalpy of Reaction 1 and the enthalpy of reaction 2"

Answer:

16g

Explanation:

1 mole of O2 = 32 g = 6.022 x 10^23 molecules

3 x 10^23 molecules weights

3 x 10^23 x 32/(6.022 x 10^23)

= 15.94g or 16g

The height of a ramp does not directly determine the strength of the frictional force between a book and an object.

The strength of the frictional force between a book and an object is not directly influenced by the height of a ramp. The nature of the surfaces in contact, the force forcing the surfaces together (normal force), and the coefficient of friction are some of the variables that affect the frictional force between two surfaces.

The coefficient of friction between the book and the object plays a major role in determining the strength of the frictional force.

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Answer:

Explanation:

Dado que:

masa de oxígeno gaseoso = 100 g

presión = 1 atm

temperatura = 273 K

(a)

número de moles de oxígeno contenidos en el matraz = masa de oxígeno / masa molar de oxígeno

= 100 g / 16 gmol⁻¹

= 6.25 moles

(b) El número de moléculas de oxígeno es el siguiente:

Dado que 1 mol de oxígeno gaseoso contiene 6.023 * 10²³ moléculas de oxígeno.

Entonces, 6.25 moles contendrán:

= (6.25 ×  6.023 * 10²³) moléculas de oxígeno.

≅ 3.764 × 10²³ moléculas de oxígeno.

(c) El número de átomos de oxígeno es:

= 2 × 3.764 × 10²³

= 7.528 × 10²³ átomos de oxígeno

(d) Usando la ecuación de gas ideal

PV = nRT

El volumen ocupado por el oxígeno = \(\dfrac{nRT}{P}\)

Volumen ocupado por oxígeno = \(\dfrac{ 6.25 * 8.314 *273}{1}\)

Volumen ocupado por oxígeno= 14185.76 m³

Answer:

Explanation:

you will have to grabe  a towle or a meten and take it off

Answer:

a) 1.567 x 10^9

b) 2.36 x 10^(-5)

Answer:

Yes

Explanation:

You can have 2s and have part of the 2p of the row in the p section.

Answer:

industrial activity

Explanation:

Answer:

Four is the maximum number of single covalent bonds that can be formed by carbon. Carbon has four electrons in the valence shell.

Explanation:

Indigo is a natural dye that is derived from the leaves of certain plants, and its color can vary depending on the method of extraction and processing.

In its unoxidized form, indigo is a yellow-green powder that is insoluble in water. When indigo is exposed to oxygen, it undergoes a chemical reaction and becomes oxidized, resulting in a blue color. The oxidized version of indigo is commonly used as a dye for textiles, and its blue color can range from a deep navy to a lighter sky blue depending on the concentration and method of application. The structure of both the oxidized and unoxidized versions of indigo is characterized by a complex organic compound known as indigotin, which gives the dye its distinctive color and chemical properties.

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Answer: B is the answer

Explanation:I just answered

The oxidizing agent in the reaction Fe + \(AgNO_3\)→ \(Fe(NO_3)_3\) + Ag is option a \(AgNO_3.\)

A redox reaction is one in which the oxidation states of two species undergo changes. Iron is oxidized in the reaction, while silver nitrate is reduced. One of the reactants is being reduced, whereas the other is being oxidized.The oxidizing agent is the species that is being reduced, and it is the species that accepts electrons.

Fe is being oxidized in this reaction. Therefore, it cannot be the oxidizing agent, nor can\(Fe(NO_3)_3\). In contrast, \(AgNO_3.\)  is being reduced, which means it is accepting electrons. This is why\(AgNO_3.\)  is the oxidizing agent.The correct answer is  option a.

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To determine the pH of a solution using a pH indicator paper, you need a color chart or a color scale that corresponds to different pH values.

This color chart or scale is used to compare the color of the pH indicator paper after it has been immersed in the solution. The pH indicator paper is impregnated with a universal pH indicator, which is a chemical compound that changes color depending on the acidity or alkalinity of the solution.

The indicator undergoes a chemical reaction with the hydrogen ions (H+) or hydroxide ions (OH-) present in the solution, resulting in a color change.

By comparing the color of the pH indicator paper with the color chart or scale, you can determine the approximate pH of the solution. The color chart usually provides a range of colors corresponding to different pH values, allowing you to match the observed color to the nearest pH value.

In the hypothesis mentioned, the aim is to calibrate a cabbage pH indicator using the pH values obtained from a universal pH indicator. Therefore, in addition to the pH indicator paper and color chart, you would also need a range of solutions with known pH values to establish a calibration curve specific to the cabbage pH indicator.

In summary, to determine the pH of a solution using a pH indicator paper, you need a color chart or scale that correlates the observed color of the pH indicator paper with different pH values. This chart or scale serves as a reference for interpreting the color change and determining the pH of the solution.

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Answer: COLOR KEY

Explanation: CS

Answer:

The plasmodial slime molds are the kind of protist that can live in groups in which different individuals perform different jobs. Some kinds of bacterial cell walls also have other functions.

Answer: False.

Explanation: It is not possible to construct a cell from scratch, for several major reasons: Cell structure and arrangements of cellular components (membranes in particular) are not directly coded in DNA sequence; they represent a sort of “institutional memory” of a cell, and are replicated through a process of cellular division.