Balance this equation: Ca(OH)2 +
HCI →
CaCl2
+
H20

Answer:

circuit

electric current

voltage difference

ohms law

resistance ​

Explanation:

Circuit - a roughly circular line, route, or movement that starts and finishes at the same place.

Electric current - A net unidirectional movement of electrons, or other charge carriers, caused by a potential difference

Voltage difference - A potential difference of one Volt is equal to one Joule of energy being used by one Coulomb of charge when it flows between two points in a circuit.

Ohms law -a law stating that electric current is proportional to voltage and inversely proportional to resistance.

Resistance - The refusal to accept or comply with something; the attempt to prevent something by action or argument.

Answer: hi! I think it would be A: Carbohydrates, fats, and proteins, but I’m not 100% sure!! If not I’m so sorry!

Explanation: btw I have a question (if you would have time to pls helps me tyy!!)

Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{density} \\\)

From the question

mass = 13 g

density = 19.3 g/cm³

We have

\(volume = \frac{13}{19.3} \\ = 0.673575...\)

We have the final answer as

Hope this helps you

1. Diana and Mike left the rest of their materials on the table.

2. Cindy picked up the pieces by hand, which is not safe, could've cut her.

3. Dumping chemical in the sink is wrong and should never be done. The also left the water running, which is a waste of water.

Hope this helps :))

According to small molecules and ions, we order the intermolecular forces according to their relative strengths:

This order is correct because of the nature of the different forces.

For small molecules and ions, arrange the intermolecular forces according to their relative strengths.

List them from stronger to weaker:

- Ion-ion forces

- Hydrogen bonds

- Dipole-dipole forces

- Ion-dipole forces

- London dispersion forces

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The complete, balanced chemical reaction for the reaction between gold (Au) and selenic acid (H2SeO4) is: 4Au + 3H2SeO4 → 2Au2(SeO4)3 + H2SO3 + H2O. The coefficients for the reactants and products are as follows: 4 for Au, 3 for H2SeO4, 2 for Au2(SeO4)3, 1 for H2SO3, and 1 for H2O. The type of chemical reaction is a single displacement reaction.

The balanced chemical equation for the reaction between gold (Au) and selenic acid (H2SeO4) is:

4Au + 3H2SeO4 → 2Au2(SeO4)3 + H2SO3 + H2O

In this equation, the coefficient in front of Au is 4, indicating that 4 moles of gold are involved in the reaction. The coefficient in front of H2SeO4 is 3, indicating that 3 moles of selenic acid are present.

On the product side, the coefficient in front of Au2(SeO4)3 is 2, indicating the formation of 2 moles of gold selenate. The coefficient in front of H2SO3 is 1, representing the formation of 1 mole of sulfurous acid. The coefficient in front of H2O is also 1, indicating the production of 1 mole of water.

Based on the reactants and products involved, the type of chemical reaction is a single displacement reaction, as gold displaces hydrogen in selenic acid to form gold selenate.

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Answer:

I think its radiant energy.

Explanation:

Acetone is a liquid substance that could be used in the laboratory for dissolving dry mortar on the floor.

Acetone is a commonly used solvent in laboratories due to its ability to dissolve a wide range of substances, including adhesives and resins. It is a volatile and flammable liquid with a low boiling point, making it convenient for cleaning purposes. Acetone is effective in dissolving dried mortar on floors as it can break down the cementitious components and facilitate their removal.

Acetone is a liquid substance that could be used in the laboratory for dissolving dry mortar on the floor.

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This is a balanced chemical reaction equation since the number of atoms of each of the elements is the same on both sides of the reaction equation.

We know that the term chemical reaction has to do with the kind of interaction that does occur between reactants and products. In this case, we have the reaction that exists between methane and oxygen. This is a combustion reaction.

There is one carbon atoms on the reactant side and one carbon atom on the products side. There are four hydrogen atoms of the reactants side and fur hydrogen atoms on the products side. There are four oxygen atoms on the reactants side and four oxygen atoms on the products side.

There are two oxygen molecules on the reactants side and there are two water molecules on the products side. This is a balanced chemical reaction equation.

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In the laboratory, hydrogen gas is used as fuel for various purposes, including heating. In order to start the heating process, it is necessary to allow the hydrogen gas to flow continuously for a while. This is because there may be air or other gases present in the hydrogen gas pipeline that can affect the heating process.

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a. In a 1.0 M ammonia solution, the species present are NH₃, NH₄⁺, OH⁻, and H₂O.

b. The pH of the ammonia solution is basic .

c. When a 1.0 M ammonia solution is added to a Cu²⁺ solution, the following reactions may occur: Cu²⁺ + 4NH₃ ⇌ [Cu(NH₃)₄]²⁺ and NH₃ + H₂O ⇌ NH₄⁺ + OH⁻.

d. If a solid precipitate is formed when 1.0 M ammonia is added to Cu²⁺, it indicates the formation of a Cu(OH)₂precipitate.

e. The addition of 15.0 M ammonia to the solution and precipitate from part d. dissolves the precipitate

a) The solution that are present in ammonia solution are NH₃, NH₄⁺, OH⁻, and H₂O which formed after dissociation and combination reactions.

b) Because ammonia is a weak base and its dissociation in water produces OH- ions, which increase the pH.

c)  The first reaction forms a complex ion and the second reaction contributes to the basicity of the solution.

d) This occurs because the addition of ammonia to the Cu²⁺ solution increases the OH- concentration, leading to the precipitation of Cu(OH)₂.

e) Because the excess ammonia shifts the equilibrium towards the formation of the Cu(NH₃)₄²⁺ complex ion, which is soluble in water. The 1.0 M ammonia solution was not enough to dissolve the precipitate because the equilibrium was not shifted enough towards the complex ion formation.

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Answer:

The answer is lemonade.

Weaker acids are those which tend to have a higher pH from 4 to at least 6 stronger acids have low pH from 2 and below that's from 2 to 0.

Hope this helps

Hope

The mass of reacted magnesium chloride is 23.75g, percent by mass of solution magnesium chloride is 90.9%.

Relation between the mass and moles of any substance will be represented as:

n = W/M, where

Moles of MgCl₂ = 200g / 95g/mol = 2.1mol

Moles of NaOH = 20g / 0.5mol

Given chemical reaction is:

MgCl₂ + 2NaOH → 2NaCl + Mg(OH)₂

From the stoichiometry of the reaction it is clear that

Mass of reacted MgCl₂ = (0.25mol)(95g/mol) = 23.75g

Percent by mass of MgCl₂ in the given solution mixture will be calculated as:

In the above reaction we obtain NaCl as a solid, and MgCl₂ is the limiting reagent in it, from which 2 moles of NaCl is produced means

Mass of NaCl = (0.5mol)(58.5g/mol) = 29.25g

Hence, mass of reacted MgCl₂ is 23.75g, percent by mass of solution magnesium chloride is 90.9% and mass of the obtained solid is 29.25g.

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All of the following metals will corrode if immersed in freshwater except chromium.  Therefore, the correct answer is option (C)

The metal chromium is very resistant to corrosion and does not corrode in freshwater. Chromium is a potent oxidising agent, which means it can readily provide electrons to other substances, creating a shield of protective oxide that prevents corrosion of the metal.

The metal is protected from the atmosphere by this extraordinarily tough oxide layer, which also serves to shield the metal from further oxidation. Chromium can also create a solid connection with oxygen, which increases its resistance to corrosion.

Chromium does not interact with other chemicals in freshwater, hence it does not corrode. To maintain corrosion resistance, chromium is frequently utilised in products like plumbing fixtures, tools, and automobile components.

Complete Question:

All of the following metals will corrode if immersed in freshwater except

(a) copper

(b) nickel

(C) chromium

(D) aluminum

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answer is: O

o goes from 0 to -2, so it is the element that is reduced

hope this helps! ;)

Answer:

I'd say Mg.

Explanation:

The reducing agent is the agent that is oxidized (losses electrons).

The oxidizing agent is the agent that is reduced (gains electrons).

For the mentioned reaction:

2Mg + O2→ 2MgO.

Mg (oxid. no. = 0) is converted to MgO (oxid. no. of Mg = +2), which means that Mg losses 2 electrons and is oxidized.

So, the reducing agent is Mg.

Given: Volume of solution, V = 10 mLConcentration of solution, C = 0.5 mol/L.

With this, we can convert the volume from mL to L by dividing it by 1000. Therefore,V = 10 mL = 10/1000 L = 0.01L. Now, we can use the formula: n = C x V where,n = number of moles C = concentration of solutionV = volume of solution. Plugging in the values, we get,n = 0.5 mol/L x 0.01 L= 0.005 mol. In chemistry, mole is defined as a unit for measuring amount of substance. The symbol used for mole is 'mol'. This unit helps to express the number of particles in a sample of substance. For instance, one mole of a substance contains 6.022 x 10²³ particles of that substance.A solution is a homogeneous mixture of two or more substances. The concentration of a solution refers to the amount of solute present per unit volume of the solution. It is usually expressed in moles per litre (mol/L) or molarity.

Molarity is defined as the number of moles of solute present in one litre of solution. It is given by the formula:M = n/Vwhere,M = molarity of the solutionn = number of moles of solute presentV = volume of the solution in litresIn the given question, we are given the volume of solution and its concentration. Therefore, we can use the formula:M = n/Vto find the number of moles of HCl present in 10 mL of a solution with a concentration of 0.5 mol/L. There are 0.005 moles of HCl present in 10 mL of a solution with a concentration of 0.5 mol/L.

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To determine how much sodium chloride will not dissolve, we need to know the solubility of NaCl at 80°C. At 80°C, the solubility of NaCl in water is 37.8 g/100 mL.

We have 100 grams of water which is equivalent to 100/1000 = 0.1 L of water.

The maximum amount of NaCl that can dissolve in 0.1 L of water at 80°C is:

37.8 g/100 mL x 0.1 L = 0.378 x 10 g = 3.78 g

Since we have 50 grams of NaCl, which is greater than the maximum amount that can dissolve, the excess amount that will not dissolve is:

50 g - 3.78 g = 46.22 g

Therefore, 46.22 grams of NaCl will not dissolve.

Answer:

46860.8 joules of heat

Explanation:

Use the formula ΔQ = mcΔT

ΔQ = gain or loss of heat (in joules)

M = mass (in grams),

C = specific heat (in J/g°C)

ΔT = change in temperature (in °C)

Substitute the known values into the formula:

ΔQ = (320.0 g)(4.184 J/g°C)(35.0˚C)

ΔQ = 46860.8 J

Answer:

Hydrogen and Oxygen

Explanation:

Hydrogen atomic mass = 1.008  amu

atomic mass = 15.999  amu

According to the periodic table, two elements whose  atomic mass is less than twice their atomic number are hydrogen and oxygen.

The atomic number of an atom refers to the number of protons in that atom. It serves as an identity for atoms of elements. The atomic mass of element is the weighted average of the masses of all the isotopes of the element.

The atomic number of oxygen is 8 while the atomic number of hydrogen is 1. The atomic mass of oxygen is 15.999 amu while the atomic mass of hydrogen is 1.0008 amu.

We can see that twice the atomic number of oxygen gives sixteen while twice the atomic number of hydrogen gives two. Therefore,  two elements whose  atomic mass is less than twice their atomic number are hydrogen and oxygen.

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Answer:

the answer is a

Explanation:

Voltage can be thought of as the pressure pushing charges along a conductor, while the electrical resistance of a conductor is a measure of how difficult it is to push the charges along.

Answer: The chemical term for the form of alcohol found in alcoholic beverages is ethanol, also known as ethyl alcohol or drinking alcohol. Ethanol is a clear, colorless liquid that is the primary ingredient in alcoholic beverages. It is a simple alcohol with the chemical formula C2H5OH, composed of two carbon atoms, six hydrogen atoms, and one oxygen atom. Ethanol is produced by the fermentation of sugars and carbohydrates in grains, fruits, and vegetables, and is also used as a solvent, fuel, and disinfectant.

Explanation:

Answer:

The number of protons in X would be 6 while that

of Y would also be 6. Thus, the two atoms would be isotopes of the same element.

Atomic properties of atoms The mass number of an atom is the sum of protons and neutrons present in the atom.

For X with mass number 12 and neutron number 6, the number of protons would be:

12-6-6 protons

For Y with mass number 13 and neutron number 7, the number of protons would be:

13-7-6 protons.

Thus, both atoms have the same number of protons, meaning that they are likely isotopes of the same element.

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The transition metals that have three electrons in their outermost d subshell are Scandium (Sc), Titanium (Ti), Vanadium (V), Chromium (Cr), and Manganese (Mn). These elements are shaded in the periodic table.

A cation of a certain transition metal with three electrons in its outermost d subshell could be Vanadium (V) or Chromium (Cr).Vanadium in its +2 oxidation state would have the electron configuration [Ar] 3d^3. Chromium in its +3 oxidation state would have the electron configuration [Ar] 3d^3 as well.To shade these elements on the periodic table outline, locate Vanadium (V) in Group 5, Period 4, and Chromium (Cr) in Group 6, Period 4. Shade these two elements to indicate that they could have three electrons in their outermost d subshell.

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27.7g is the mass of  9.3 x10²⁴ molecules of glucose. The mole signifies 6.022×10²³ units, which is a very big quantity.

In chemistry, a mole, sometimes spelt mol, is a common scientific measurement unit for significant amounts of extremely small objects like atoms, molecules, or even other predetermined particles. The mole signifies 6.022×10²³ units, which is a very big quantity.

Under the International System of Units (SI), the mole is defined as this quantity as of May 20, 2019, according the General Meeting on Weights and Measurements. The amount of atoms discovered via experimentation to be present in 12 grams pure carbon-12 was originally used to define the mole.

number of moles = given number of particles/  6.022×10²³

number of moles = 9.3 x10²⁴  /  6.022×10²³

                            = 15.4mole

mass of glucose = 15.4x180.1=27.7g

Therefore, 27.7g is the mass of  9.3 x10²⁴ molecules of glucose.

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Answer:

gas

Explanation:

at Standard Temperature and Pressure Carbon monoxide (CO), carbon dioxide (CO2) and nitrogen dioxide (NO2) exist as gases

Option C is correct

Covalent compounds are compounds that are characterized by strong Intra-molecular bonds and they are solids as they have higher molecular weights

But when compounds like Carbon monoxide (CO), carbon dioxide (CO2), and nitrogen dioxide (NO2) are formed with low molecular weight covalent bonds They exist as gases

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Answer:

here is my answerrrrrrr

Dr. John Athowe's article in "Conseseret" discusses high blood pressure in athletes, emphasizing the importance of precise measurement techniques.

Reading the article titled "High Blood Pressure in Athletes" by Dr. John Athowe in the journal "Conseseret," it explores the phenomenon of elevated blood pressure in athletes. The study delves into the intricacies of this condition, focusing on various factors contributing to its prevalence.

According to Dr. Athowe's research, high blood pressure among athletes is a significant concern, despite the general perception that athletes have excellent cardiovascular health.

The article highlights that intense physical training can lead to increased blood pressure due to the body's physiological response to exercise.

The study emphasizes the importance of accurate measurement techniques to assess blood pressure in athletes.

Dr. Athowe recommends using decimal places to obtain more precise readings. By utilizing three decimal places (3 decimal misiest), researchers can gain deeper insights into subtle changes in blood pressure.

The article suggests that various factors can contribute to high blood pressure in athletes, such as genetic predisposition, body composition, and training intensity.

Additionally, the study acknowledges the potential role of ergogenic aids and performance-enhancing substances in exacerbating blood pressure elevation among athletes.

In conclusion, Dr. Athowe's research sheds light on the complex relationship between athletes and high blood pressure.

The article underscores the need for further investigation and tailored interventions to mitigate the long-term cardiovascular risks associated with this condition in the athletic population.

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The minimum amount of energy required to ionize an atom varies depending on the specific atom and its electronic configuration. The energy required is known as ionization energy and is measured in electron volts (eV).

To provide a bit more explanation, ionization energy is the amount of energy required to remove an electron from an atom or molecule, thereby creating a positive ion. The ionization energy increases as you move from left to right across the periodic table and decreases as you move down a group. This is because the number of protons in the nucleus increases as you move across a period, making it harder to remove an electron, while moving down a group adds additional electron shells, which increases the distance between the nucleus and outermost electrons, making them easier to remove.

Therefore, to determine the minimum amount of energy required to ionize a specific atom, you would need to look up its ionization energy in a periodic table or reference book. This energy value represents the threshold amount of energy needed to remove the most loosely held electron from the atom.

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