Which element can join with other elements to form covalent bonds? beryllium (Be) carbon (C) cesium (Cs) iron (Fe)

The given reaction can be balanced as follows: CaC2 + 2H2O → Ca (OH)2 + C2H2. Grams of water required to completely react with 82.4 g of CaC2 is 46.28 g.

What is a balanced reaction?

In balanced reaction, the number of each and every element on both side is balanced. In the given reaction to balance the number of H and O, add 2 to H₂O so that, all the species will be equal in number on both side.

Now, as per the balanced reaction, 2 moles of water is required to reacts with 1 mole of CaC2.

Mass of one mole of water = 18 g/mol.

                                   2 mole = 36 g

Mass of one mole of CaC2 = 64.09 g/mol

Thus 36 g of water is required to react with 64.09 grams of calcium carbide. Mass of water required to react with 82.4 g of calcium carbide is calculated as follows:

Mass of water = (36 g×82.4 g)/64.09 g = 46.28 g

Hence, 46.28 grams of water is required to completely react with 82.4 g of calcium carbide.

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The amount of heat required to completely melt 20.0 grams of ice at its melting point is 83.6 J.

To calculate the heat required to melt ice, we will use the formulaQ = mLwhere Q represents the heat, m represents the mass, and L represents the latent heat of fusion of water.

The latent heat of fusion of water is 334 J/g.

Therefore, for the given mass of ice (20.0 g) the amount of heat required would be:Q = mLQ = 20.0 g × 334 J/gQ = 6680 J

However, since the question specifically asks for the minimum amount of heat required to completely melt the ice, we must consider that at the melting point, some of the ice is already at a temperature of 0°C, and thus has already gained some heat.

To calculate this heat, we will use the specific heat capacity of water, which is 4.184 J/g°C.We know that to raise the temperature of 1 g of ice from -273.15°C to 0°C, we require 0.5 J of heat.Therefore, for 20 g of ice at -273.15°C, the heat required to raise the temperature to 0°C would be:

Q = 20 g × 0.5 J/gQ = 10 J

Thus, the total amount of heat required to completely melt 20.0 g of ice at its melting point would be:

Q = 6680 J + 10 JQ = 6690 J

However, since we are asked for the minimum amount of heat required, we must subtract the 10 J required to raise the temperature of the ice from -273.15°C to 0°C, giving us:Q = 6690 J - 10 JQ = 6680 J

Therefore, the correct answer is (2) 83.6 J (rounded to 3 significant figures).

:The minimum amount of heat required to completely melt 20.0 grams of ice at its melting point is 83.6 J.

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The suggest units for each case are, respectively:

a) The distance between Chicago and Saint Louis - Kilometer.

b) The size of your bedroom - Meter.

c) The dimensions of this textbook - Centimeter.

d) The thickness of a hair - Micrometer.

Reminder - Question is incomplete, the complete statement is described below:

"The fundamental SI unit of length is meter. However, we often deal with larger or smaller length or distances for which multiplies or fractions of the fundamental units are more useful. For each of the following situations, suggest what fraction or multiple of the meter might be the most appropriate measurement:

a) The distance between Chicago and Saint Louis.

b) The size of your bedroom.

c) The dimensions of this textbook.

d) The thickness of a hair."

We can determine if a Unit is either a Multiple or a Fraction by using the following formula:

\(\frac{Q_{u}}{Q_{r}} = 10^{n}\) (1)

Where:

\(Q_{u}\) - Used unit, in meters.

\(Q_{r}\) - Reference unit, in meters.

\(n\) - Unit-to-unit factor, no unit.

A Measure has a Multiple of the Fundamental Unit if and only if \(n> 0\), and it is a Fraction of the Fundamental Unit if and only if \(n < 0\).

Now we proceed to analyze each case:

a) The distance between Chicago and Saint Louis - The Kilometer is the most common unit to measure Distance between Cities. A Kilometer has a Unit-to-unit factor of 3, representing a Multiple of the Meter.

b) The size of your bedroom - The Meter is the most common unit for Housing and Buildings. A Meter has a Unit-to-unit factor of 0, representing the Fundamental Unit itself.

c) The dimensions of this textbook - The Centimeter is the most common unit for dimensions of Books. A Centimeter has a Unit-to-unit factor of -2, representing a Fraction of the Meter.

d) The thickness of a hair - The Micrometer is the most common unit for the Thickness of a Hair. A Micrometer has a Unit-to-unit factor of -6, representing a Fraction of the Meter.

Then, the suggest units for each case are, respectively:

a) The distance between Chicago and Saint Louis - Kilometer.

b) The size of your bedroom - Meter.

c) The dimensions of this textbook - Centimeter.

d) The thickness of a hair - Micrometer.

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Answer:

1. SnO2 = 1; H2 = 2; Sn = 1; H2O = 2

2. I mole of SnO2 is required to react with 2 moles of H2 to produce 1 mole of Sn and 2 moles of H20.

The balanced equation represents 1 mole of SnO2

3. Total mass of reactants and products are each 154.71g respectively

Explanation:

1. According to the law of conservation of mass, the total mass of reactants in a chemical reaction is equal to the mass of products.

Therefore, a balanced chemical equation has equal number of moles of each atom on the reactants side and on the product side. The balanced chemical equation for the reaction above will be:

Sn02 + 2H2 + Energy -----> Sn + 2H2O

Sn has 1 mole of atoms on both sides

O has 2 moles of atoms on both sides

H has 4 miles of atoms on both sides.

2. According to the balanced chemical equation above,

1 mole of SnO2 reacts with 2 moles of H2 to produce 1 mole of An and 2 moles of H20.

This balanced equation represents 1 mole of SnO2.

3. The atomic masses of Sn, O and H are 118.71g, 16g and 1g respectively.

Therefore, the molar masses of the reactants and products are;

SnO2 = 118.71 + 16 * 2 = 150.72g

H2 = 2 *1 = 2g

H2O = 2 * 1 + 16 = 18g

Total mass of reactants = 150.71g + 2 * 2g = 154.72g

Total mass of products = 118.71 + 2 * 18g = 154.71g

Answer:

NaOH + HCl → H2O and NaCl

Explanation:

The volume of the irregular solid from the image that have been shown is  12 mL

To obtain the volume of the irregular solid;

a. Measure the initial volume of water in the cylinder.

b. Carefully lower the irregular solid into the water, ensuring it is fully submerged without trapping any air bubbles.

c. Record the new volume of water in the cylinder.

d. The volume of the irregular solid is equal to the difference between the final and initial water volumes.

The volume is;

32 mL - 20 mL = 12 mL

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Answer:It allows us to see things so we know where we are going that’s why at night we had lamp posts

Explanation:

Answer:

The forces involved in a collision are equal in size and directed in the opposite direction, and they accelerate both objects. Each object accelerates equally in collisions with things of equal mass.

Explanation:

Benzene will release the greatest amount of heat when 1.00 mol of it is dissolved.

Molar Heat of Fusion and Melting Point for Selected Substances.The molar heat of fusion of a substance is the quantity of heat needed to melt one mole of it at its melting point. The quantity of heat discharged when 1.00 mol of a substance is dissolved is referred to as the molar heat of fusion. The unit of measurement for molar heat of fusion is kJ/mol.The following is a list of the melting points and molar heat of fusion for the given substances.Argon Melting Point: -189.4°C Molar Heat of Fusion: 1.18 kJ/molBenzene Melting Point: 5.5°C Molar Heat of Fusion: 9.87 kJ/molMercury Melting Point: -38.8°C Molar Heat of Fusion: 2.29 kJ/molWater Melting Point: 0°C Molar Heat of Fusion: 6.01 kJ/molThe quantity of heat released when 1.00 mol of each substance is dissolved is the molar heat of fusion. The substance with the highest molar heat of fusion would release the greatest amount of heat when 1.00 mol of it is dissolved.Benzene has the highest molar heat of fusion of the four substances, with a value of 9.87 kJ/mol.

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A student makes two mixtures, both made of the same substances. Both mixtures can be physically separated into its components. Therefore, option C is correct.

A substance made up of two or more separate chemical compounds that are not chemically linked is referred to as a mixture. A mixture is the physical blending of two or more substances while maintaining their distinct identities. It can take the form of solutions or suspensions.

A pure substance is a single sort of matter that cannot be divided into other kinds of matter by any physical methods. A pure substance has a known and consistent composition at all times.

When two or more distinct substances physically join, a mixture is produced that can be dispersed back into its constituent parts. When two or more compounds combine to create a new substance that cannot be broken down into its constituent parts, a chemical reaction takes place.

Thus, option C is correct.

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The only incorrect statement in the diagram is (d) Cr202-7 can be used in aqueous H2SO4.

Option (d) is incorrect because the half-cell reaction involving Cr2O7^2- and H+ (aq) produces H2CrO4, which can decompose in acidic solutions, leading to inaccurate results. Therefore, Cr2O7^2- should not be used in aqueous H2SO4 for the quantitative estimation of Fe(NO3)2-.

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The Only incorrect statement is option C

Electrochemistry is a branch of chemistry that deals with the study of the relationship between electrical energy and chemical reactions.

It involves the study of the behavior of electrons and ions in chemical reactions that occur in a solution or at the interface between two different phases, such as a solid electrode and a liquid electrolyte.

We can see that it is better to use HCl instead of the use of the H2SO4 acid as we have in the options.

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The correct option is D, in sulfur trioxide there is one atom of sulfur and three atoms of oxygen.

Sulfur trioxide has a chemical formula  \(SO_{3}\) which clearly signifies one atom of sulfur and three atoms of oxygen.

In the case of option B: three atoms of sulfur and one atom of oxygen, do not make the chemical composition  \(SO_{3}.\) Hence option B is incorrect.

In the case of option C: one atom of sulfur and one atom of oxygen, do not make the chemical composition as \(SO_{3}.\). Hence option C is incorrect.

In the case of option D: one atom of sulfur and three atoms of oxygen, do not make the chemical composition  \(SO_{3}.\) Hence option D is incorrect.

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When pressure-volume measurements are made on 1.0 mol of gas at constant temperature, the resulting plot is a. hyperbola. This is due to Boyle's law.

In the study of gases, pressure and volume are two fundamental properties that are often measured and analyzed together. When studying the relationship between pressure and volume for a fixed amount of gas at a constant temperature, different types of plots can be obtained. When pressure-volume measurements are made on 1.0 mol of gas at constant temperature, the resulting plot of volume (V) versus pressure (P) is a hyperbola. This is known as Boyle's law, which states that at constant temperature, the product of the pressure and volume of a gas is constant. Mathematically, this can be expressed as PV = constant.

When this relationship is graphed, we obtain a hyperbolic curve that shows that as the pressure on the gas increases, its volume decreases and vice versa. This relationship can be explained by the behavior of gas molecules. When the pressure on a gas is increased, the molecules are forced closer together, which reduces the volume of the gas. Conversely, when the pressure is decreased, the molecules have more space to move around, which increases the volume.

In contrast, a parabolic plot would result from pressure-volume measurements on a gas that obeys Charles's law, which states that at constant pressure, the volume of a gas is directly proportional to its temperature. A sine curve would result from pressure-volume measurements on a gas that obeys the ideal gas law, which takes into account the number of moles of gas and the absolute temperature. Finally, a straight line plot would result from pressure-volume measurements on a solid or liquid, which are virtually incompressible.

In conclusion, when pressure-volume measurements are made on 1.0 mol of gas at constant temperature, the resulting plot is hyperbola. This is due to Boyle's law, which states that at constant temperature, the product of the pressure and volume of a gas is constant. Understanding the relationship between pressure and volume is crucial for the study of gases and their behavior under different conditions. So the correct option is a. hyperbola.

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Answer:

1.) Fluorine

2.) Francium

3.) Nonmetals

4.) Metals

5.) Aluminum

6.) Helium

Explanation:

Carbon fiber Vs Steel:

Steel has a density that is about five times more when compared to carbon fiber.

What is Carbon fiber (CFRC):

Carbon is an element that occurs naturally, and carbon fiber is made of this element. Because of its crystalline structure, carbon fiber possesses excellent tensile strength and stiffness capabilities. It is used to create lightweight composite parts that have great strength by wrapping the fiber in a polymer matrix.

What is steel:

Steel has long been a preferred material due to its high elasticity, which is around 200 GPa. Its relative abundance and stiffness have made it a widely used manufacturing material. However, because of its weight and density of around 8 g/cm3, it can be exceedingly difficult on the machines it is intended to protect. This weighs nearly five times as much as carbon fiber materials which would offer an equivalent or higher level of stiffness.

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Complementary angles are two angles whose sum is 90 degrees.

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Answer:

The molar concentration of NaOH in the final diluted solution is 0.056 M

Explanation:

Answer:

A

Explanation:

The high humidity, in conjunction with warm temperatures, creates massive amounts of warm, moist air rising into the atmosphere, where it can easily form a thunderstorm. As the process of evaporation and condensation occurs, these droplets collide with other moisture that is condensing as it rises.

Explanation: You know that the mass of an individual lead atom is equal to

3.4

⋅

10

−

22

grams.

A substance's density tells you what its mass per unit of volume is. In this case, you know that lead has a density of

11.3 g/cm

3

, which means that each

cm

3

of lead will have a mass of

11.3 g

.

Now, your cube has a volume of

2.00 cm

3

, which means that its mass will be equal to

2.00

cm

3

⋅

density



11.3 g

1

cm

3

=

22.6 g

Now all you have to do is look at the mass of one lead atom and figure out exactly how many lead atoms would be needed to make the total mass of the cube equal to

22.6 g

.

22.6

g

⋅

the mass per atom



1 lead atom

3.4

⋅

10

−

22

g

=

6.647

⋅

10

22

lead atoms

Rounded to two sig figs, the number of sig figs you have for the mass of an individual lead atom, the answer will be

no. of lead atoms

=

6.6

⋅

10

22

atoms

You can double-check this result by using lead's molar mass, which tells you what the exact mass of one mole of lead is.

22.6

g

⋅

1 mole Pb

207.2

g

=

0.1091 moles Pb

Now use Avogadro's number to determine how many atoms of lead you have in that many moles

0.1091

moles

⋅

6.022

⋅

10

23

atoms

1

mole

=

6.57

⋅

10

22

atoms

To two sig figs, you will once again get

no. of lead atoms

=

The pair of elements that will form an ionic compound are magnesium and oxygen. Ionic compounds are formed when one element donates electrons to another element. In this case, magnesium donates two electrons to oxygen, resulting in the formation of magnesium oxide (MgO).

The transfer of electrons from magnesium to oxygen creates ions with opposite charges - magnesium becomes a positively charged ion (cation) and oxygen becomes a negatively charged ion (anion). This type of bond is characterized by the strong electrostatic forces between the ions.

Other examples of ionic compounds include sodium chloride (NaCl) and potassium iodide (KI). In these compounds, sodium, potassium, and iodine also donate electrons to chlorine and iodine atoms respectively.

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Answer:

3.47 mol MnSO4

Explanation:

54.94 + 32.07 + (16 × 4) = 151.01g/mol MnSO4

542.32g / 151.01g/mol = 3.47 mol MnSO4

Claim: The ability of a crane to pick up and release pieces of metal is due to the principles of electromagnetism.

Evidence:

Reasoning:

Therefore, the principles of electromagnetism are responsible for the crane's ability to pick up and release pieces of metal.

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The mass of KF in the mixture is 1.067 grams

As per the details provided in the question are as follow,

Total weight of mixture (LiF+KF)= 5.08 grams

Mixture contains 3.26 grams of fluorine

Molar mass K = 39.10 g/mol

Molar mass F = 19.00 g/mol

Molar mass KF = 58.10 g/mol

Molar mass of lithium = 6.94 g/mol

mass of KF and LiF

Mass KF = X grams

Mass LiF = 5.08 -X grams

Now Calculate the moles

Moles KF = x grams / 58.10 g/mol

Moles LiF = (5.08-X grams) / 25.94 g/mol

1 mol of KF contains 1 mol of F atoms.

1 mol of LiF contains 1 mol of F atoms.

moles of F in KF= moles of KF= x/58.10 g/mol

moles of F in LiF = moles of LiF=  (5.08-x)/25.94g/mol

Total moles of Fluorine =(x/58.10)+((5.08-x)/25.94)

Calculate mass

The total weight of Fluorine in sample

3.26 grams =((x/58.10)+((5.08-x)/25.94))*19g/mol

x = 1.067 grams

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Answer

Explanation

Note: The reaction is a double replacement reaction in which two soluble ionic compounds react in an aqueous solution to form an insoluble solid.

In this case, a solution of sodium carbonate, Na2CO3, will contain

The complete balanced equation that occurs when sodium carbonate is added to hard water is

Answer:

Lubrication in vehicles. When you put oil into your car or truck, you should be aware of its viscosity

Cooking. Viscosity plays a significant role in the preparation and serving of food.

Manufacturing. Manufacturing equipment requires appropriate lubrication to run smoothly.

oh, and medicine

The balanced equation for the reaction is: I2(s) + 2Cl-(aq) → 2I-(aq) + Cl2(g)

The reaction between solid iodine (I2) and aqueous chloride ions (Cl-) will produce iodide ions (I-) and chlorine gas (Cl2). The reaction is a redox reaction, with iodine being reduced and chloride being oxidized. In the reaction, the two chloride ions will react with one molecule of iodine, resulting in the formation of two iodide ions and one molecule of chlorine gas. The reaction is unbalanced, as the number of atoms of each element is not equal on both sides of the equation.To balance the equation, we need to multiply the chloride ions by two and the chlorine gas by two. This will result in the balanced equation shown above.

The reaction between iodine and chloride ions is a redox reaction, where iodine is reduced from its elemental state to the iodide ion and chloride is oxidized from its anion state to the chlorine molecule.When iodine and chloride ions are mixed together, the electrons in the chloride ions interact with the iodine molecule, causing the iodine to gain electrons and be reduced. This process results in the formation of iodide ions and the oxidation of the chloride ions.

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