The active ingredient in Tums is calcium carbonate. One Tums tablet contains 500 mg of calcium carbonate. If the Daily Value (DV) for Ca2+ to maintain bone strength in older women is 1500mg, how many Tums tablets are needed each day?

Answer: Yes, sulfuric acid is highly soluble in water.

Explanation:

Answer:

Here's what I get  

Explanation:

(i) Voltaic cell

A voltaic cell is a device that uses a chemical reaction to produce electrical energy.

(ii) Overall Cell Potential

The standard reduction potentials for the half-reactions are

                               ℰ°/V

Cu²⁺ + 2e⁻ ⇌ Cu    0.34

Zn²⁺ + 2e⁻ ⇌ Zn   -0.76

The half-reaction with the more positive potential is the reduction half-reaction. It is the reaction that occurs at the cathode.

The half-reaction with the more negative potential is the oxidation half-reaction. It is the  reaction that occurs at the anode.

We reverse that half-reaction and subtract the voltages to get the cell reaction.

                                                          ℰ°/V

Cathode:  Cu²⁺ + 2e⁻ ⇌ Cu              0.34

Anode:     Zn ⇌ Zn²⁺ + 2e⁻              -0.76

Cell:          Zn +  Cu²⁺ ⇌ Zn²⁺ + Cu    1.10

\(\mathcal{E}_{\text{cell}}^{\circ} = \mathcal{E}_{\text{cat}}^{\circ} - \mathcal{E}_{\text{an}}^{\circ} = \text{0.34 V} - \text{(-0.76 V)} = \text{0.34 V} + \text{0.76 V} = \textbf{1.10 V}\)

(iii) Diagram

The specific labels will depend on your textbook.

They are often as follows.

a. Electron flow

b. Voltmeter or lightbulb

c. Electron flow

d. Cathode or Cu

e. Cu²⁺(aq) and NO₃⁻(aq)

f. Salt bridge

g. Zn²⁺(aq) and NO₃⁻(aq)

h. Anode or Zn

The salt bridge enables ions to flow in the internal circuit and to maintain electrical neutrality in the two compartments.

It often consists of a saturated solution of KCl.

As Zn²⁺ ions form in the anode compartment, Cl⁻ ions move in to provide partners for them.

As Cu²⁺ ions are removed from the cathode compartment, K⁺ ions move in to replace them.

Answer:a. Electron flow

b. Voltmeter or lightbulb

c. Electron flow

d. Cathode or Cu

e. Cu²⁺(aq) and NO₃⁻(aq)

f. Salt bridge

g. Zn²⁺(aq) and NO₃⁻(aq)

h. Anode or Zn

Explanation:

120.3 g of benzene is required to produce 109.5 grams of maleic acid anhydride.

The reaction equation is;

2 C₆H₆(l) + 9 O₂(g) → 2 C₄H₂O₃(s) + 4 CO₂(g) + 4 H₂O(g)

Actual yield of   maleic anhydride = 109.5 g

Theoretical yield = 100 × Actual yield/% yield

Theoretical yield =  100 ×  109.5/72.6

Theoretical yield  = 150.8 g

Number of moles of maleic anhydride = mass/molar mass = 150.8 g/98.06 g/mol = 1.54 moles

From the reaction equation;

2 moles of benzene yields 2 moles of maleic anhydride

1.54 moles of benzene yields 1.54 moles of maleic anhydride

Mass of benzene required = 1.54 moles × 78.11 g/mol

Mass of benzene required = 120.3 g of benzene.

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Answer:

A.) 0.43 g

Explanation:

Before you can calculate the mass, you need to find the moles. You can do this by using Avogadro's Law:

V₁ / n₁ = V₂ / n₂

In this equation, "V₁" and "n₁" represent the first balloon's volume and mole value. "V₂" and "n₂" represent the second balloon's volume and mole value. Since you are searching for the first balloon's mole value, you can plug the other values into the equation and simplify to find n₁.

V₁ = 1.54 L                         V₂ = 0.72 L

n₁ = ? moles                      n₂ = 0.100 moles

V₁ / n₁ = V₂ / n₂                                               <----- Avogadro's Law

1.54 L / n₁ = 0.72 L / 0.100 moles                 <----- Insert values

1.54 L / n₁ = 7.2                                              <----- Simplify right side

1.54 L = 7.2 x n₁                                              <----- Multiply both sides by n₁

0.214 = n₁                                                       <----- Divide both sides by 7.2

Now, you can find the mass using the molar mass of the gas. Remember, hydrogen exists as a diatomic molecule.

Atomic Mass (H₂): 2(1.008 g/mol)

Molar Mass (H₂): 2.016 g/mol

0.214 moles He            2.016 g
--------------------------  x  -----------------  =  0.43 g H₂
                                       1 mole

Answer:

1) Pure water can conduct electricity because a small proportion of its molecules dissociate into ions . The two ions formed in water are, hydrogen ions, H +, and hydroxide ions, OH -.

2) dynamic equilibrium

Explanation:

I hope this helps!

The isoelectric point (pI) of a tripeptide with sequence His-Glu-Ala is pH 7. The isoelectric point (pI) is the pH at which the net charge of an amino acid, protein, or other amphoteric molecule is zero (equal numbers of positive and negative charges).

At this pH, the amino acid will exist as a zwitterion. In other words, the pH at which an amino acid has no net charge is called its isoelectric point. The isoelectric point is determined by the pKa values of the amino acid's side chain and the alpha-carboxyl group.

The pH at which the alpha-amino group becomes protonated, making the overall molecule positive, is also affected by the pKa value of the side chain.Therefore, The isoelectric point of a tripeptide with sequence His-Glu-Ala is pH 7.

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The states of matter of the materials;

1) Dispersion forces - Yes

2) Hydrogen bonding - No

3) Ionic - No

4) Dispersion forces - No

5)  Dispersion forces - Yes

6) Ionic  - No

7) Hydrogen bonding - No

Sublimation is a physical process in which a substance transitions directly from its solid phase to its gaseous phase without passing through the intermediate liquid phase. In sublimation, the solid substance is heated, and the resulting gas molecules escape from the solid lattice structure without the need for melting.

One common example of sublimation is the process of dry ice. Dry ice is solid carbon dioxide (CO2) that sublimes at a temperature of -78.5 degrees Celsius (-109.3 degrees Fahrenheit). When dry ice is exposed to room temperature, it transitions directly from a solid to a gas, producing a fog-like effect.

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The final temperature of the gas is approximately 40.96 Kelvin.

To determine the final temperature of the gas, we can use the ideal gas law, which states:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles of the gas, R is the ideal gas constant, and T is the temperature in Kelvin.

First, let's convert the given temperatures to Kelvin. We have:

Initial temperature: -125 degrees Celsius = 148 K (approximate)

Final temperature: Unknown

The initial conditions of the gas are as follows:

Initial pressure (P1) = 1.25 atm

Initial volume (V1) = 1250 mL = 1.25 L (since 1 L = 1000 mL)

Initial temperature (T1) = 148 K

The final conditions of the gas are as follows:

Final pressure (P2) = 50.0 atm

Final volume (V2) = 325 mL = 0.325 L

Final temperature (T2) = Unknown

Using the ideal gas law, we can set up the following equation:

(P1 * V1) / T1 = (P2 * V2) / T2

Substituting the known values:

(1.25 atm * 1.25 L) / 148 K = (50.0 atm * 0.325 L) / T2

Simplifying the equation:

T2 = (50.0 atm * 0.325 L * 148 K) / (1.25 atm * 1.25 L)

T2 = 40.96 K

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Answer:

The answer is in my attachment

Explanation:

hope this helped!

Las diferencias entre el consumo de agua existen debido a que varios factores externos inciden en este proceso de ingesta de agua.

El agua es un compuesto químico que es vital para la vida de los seres vivos. En el caso de los humanos es necesario tomar agua para evitar la deshidratación y activar muchos procesos naturales del cuerpo.

La cantidad de agua que debe tomar un humano depende de varios factores como:

Incluso la cantidad de agua de agua puede variar dependiendo del peso de cada persona, aquellas personas que pesan más deben beber más agua, que aquellas que tienen menor peso debido a que la cantidad de agua debe ser proporcional a su peso.

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The statement, "a common substitution in the tetrahedral sheet is aluminum for silicon." is true.

In the tetrahedral sheet of minerals such as micas, chlorites, and clay minerals, silicon (Si) atoms are typically surrounded by four oxygen (O) atoms, forming a tetrahedral structure.

However, aluminum (Al) can substitute for some of the silicon atoms in the tetrahedral sheet.

This substitution can occur because aluminum is similar in size and charge to silicon, and it can fit into the tetrahedral structure without significantly altering the overall structure.

This substitution is known as isomorphous substitution, and it is a common phenomenon in minerals.

The extent of substitution can affect the properties of the mineral, such as its charge balance and cation exchange capacity.

It can also affect the reactivity and stability of the mineral in various environments, including soils, sediments, and rocks.

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Answer:

The velocity of the bb when it reaches a height of 203 m can be determined using the laws of projectile motion. Since the bb is moving vertically upwards, its velocity at that height will be zero.

brainlest?

Answer: v = 83.96 m/s

Assuming the acceleration due to gravity is approximately 9.8 m/s^2, we can use the principles of projectile motion and energy conservation.

Using the equation for the vertical displacement of an object in free fall:

Δy = (v₀² - v²) / (2g)

Δy = vertical displacement (203m)

v₀ = initial velocity (105 m/s)

v = final velocity (not known yet)

g = accerlation due to gravity (9.8 m/s^2)

Lets rearrange the equation to solve for the final velocity:

v = v = √(v₀² - 2gΔy)

Substituting the given values:

v = √(105² - 2 * 9.8 * 203)

v ≈ √(11025 - 3979.6)

v ≈ √(7054.4)

v ≈ 83.96 m/s

Therefore, when the BB pellet is at the height of 203m, its velocity will be approximately 83.96 m/s.

The law of conservation of matter says that in chemical reaction and the statement is the total mass of the product must equal the total mass of the reactant

The law of conservation of mass states that the mass in an isolated system is neither created nor destroyed by chemical reaction or physical transformation and according to the law of conservation of mass and the mass of the product in a chemical reaction must equal to the reactant that means total mass of the product must equal the total mass of the reactant

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Answer:

ALPHA

Explanation:

There are 12 Hydrogen atoms in 2-methylbutane since its chemical formula is  C₅H₁₂.

The building is seen below in the picture:

In the presence of a chromia-alumina catalyst, 2-methylbutane is catalytically dehydrated to produce isoamylenes, which may then be further dehydrated to produce isoprene. Trans-Bis(triethylphosphine) (hydroxy carbonyl) (phenyl) platinum(II), a metallacarboxylic acid, may also be made using it as a solvent.

An intermediary chemical is 2-methylbutane. It serves as a polystyrene blowing agent and fuel additive. It is employed in the production of polyurethane and polystyrene foam as well as a solvent for polyethylene. Moreover, it is employed to run turbines in a closed loop throughout the geothermal energy generation process.

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Explanation:

A reaction at equilibrium essentially means that the number of reactants and products is constant (but not necessarily equal) and continue to be constant until a change is imposed on the system.

Given equation is,

CO(g) + 2H2(g) ⇌ CH3OH(g)

At equilibrium, the amount of CH3OH(g) formed = 0.060 mol

Number of moles of CO(g) = 0.40 mol

Number of moles of H2(g) = 0.30 mol

The number of moles of CH3OH(g) formed per mole of CO(g) =0.060 mol/0.40 mol = 0.150

The number of moles of CH3OH(g) formed per mole of H2(g) =0.060 mol/ (0.30 × 2) mol = 0.100

Since, the coefficients of all the species in the balanced equation are 1 or 2, so the equilibrium constant expression can be written as,

Kc = [CH3OH]/ [CO][H2]

Since, at equilibrium, the amount of CH3OH(g) formed = 0.060 mol, the amount of CO(g) reacted = 0.40 - 0.060 = 0.34 mol, and the amount of H2(g) reacted = 0.30 - (0.060/2) = 0.27 mol

Putting these values in the above equation,

Kc = (0.060/1.0) / [(0.34/1.0) × (0.27/1.0)]Kc = 0.150

Therefore, the value of Kc is 0.150.

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Explanation:

a. CGS system: centimetre as the unit of length, the gram as the unit of mass, and the second as the unit of time

b. SI system: metre as the unit of length, the kilogram as the unit of mass, and the second as the unit of time

Answer:

you can simply answer vl/t1=v2/t2

The balanced equations of the given reactions are:

1. 2 Mg + O₂ ---> 2 MgO + heat + light

2. (NH₄)₂CO₃ + O₂ ---> 2 NH₃ + CO₂ + H₂O

3. Fe + CuSO₄ ---> FeSO₄ + Cu

4. C₂H₅OH + 3 O₂ ---> 2 CO₂ + 3 H₂O + heat + light

5. Pb(NO₃)₂ + 2 KI ---> 2 KNO₃ + PbI

The balanced equations of the given reactions are derived from the hypothesis of the product formed.

1. When magnesium metal is heated in air, it will react with oxygen to produce magnesium oxide and release heat and light.

2 Mg + O₂ ---> 2 MgO + heat + light

2. When ammonium carbonate is heated in air, it will decompose into ammonia, carbon dioxide, and water vapor, and release a pungent odor.

(NH₄)₂CO₃ + O₂ ---> 2 NH₃ + CO₂ + H₂O

3. When steel wool (iron) is placed into a solution of copper (II) sulfate, a single displacement reaction will occur where iron will replace copper in the compound, forming iron (II) sulfate and copper metal.

Fe + CuSO₄ ---> FeSO₄ + Cu

4. When ethanol (C₂H₅OH) is lit with a lighter, it will burn and produce carbon dioxide and water vapor, and release heat and light.

C₂H₅OH + 3 O₂ ---> 2 CO₂ + 3 H₂O + heat + light

5. When a solution of lead (II) nitrate is mixed with a solution of potassium iodide, a double displacement reaction will occur where lead will replace potassium in the compound, forming lead iodide and potassium nitrate, which will precipitate out as a yellow solid.

Pb(NO₃)₂ + 2 KI ---> 2 KNO₃ + PbI

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When the anion gap exceeds 16 mEQ/L, the cause is generally an increase in fixed acids.

When the anion gap, which represents the difference between measured cations and anions in the blood, exceeds 16 mEQ/L, it is typically indicative of an increase in fixed acids. The anion gap is a valuable tool in diagnosing metabolic acidosis and evaluating the acid-base balance in the body.

An increase in fixed acids, such as lactic acid, ketoacids, or toxins, leads to an accumulation of these acidic substances in the blood. This causes a disturbance in the acid-base equilibrium, resulting in metabolic acidosis. Metabolic acidosis occurs when there is either a decrease in bicarbonate (base) or an increase in non-volatile acids (fixed acids) in the body.

An elevated anion gap indicates the presence of unmeasured anions, which are usually the result of increased fixed acids. These fixed acids can arise from various conditions, including diabetic ketoacidosis, lactic acidosis, renal failure, and certain toxic ingestions. By measuring the anion gap, healthcare professionals can identify the underlying cause of metabolic acidosis and guide appropriate treatment.

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Answer:

33 moles

Explanation:

The given chemical reaction is 2C₄H₁₀(g) + 13 O₂(g) → 10H₂O(g) + 8CO₂(g)

The number of moles of each reactant are as follows;

Butane, C₄H₁₀ = 2 moles of (g) + 13 (g) → 10H₂O(g) + 8CO₂(g)

Oxygen gas, O₂ = 13 moles

Water, H₂O = 10 moles

Carbon dioxide, CO₂ = 8 moles

The total number of moles, n = (2 + 13 + 10 + 8) = 33

∴ The total number of moles involved in the reaction, n = 33 moles.

Answer:

Iodine

Explanation:

Iodine is located in the 5th period, meaning that it will have 5 energy levels.

Additionally, Iodine has an atomic mass of about 127 atomic mass units, and since it has 53 protons, it will have 74 neutrons.

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Explanation:

e is right now answer for teaching us

Carbon forms molecular compounds with some elements from Group 16. Two of these compounds are carbon dioxide, CO2, and carbon disulfide, CS2. Carbon dioxide is a colorless, odorless gas at room temperature. At standard temperature and pressure, CO2(s) changes directly to CO2(g). Carbon disulfide is formed by a direct reaction of carbon and sulfur. At room temperature, CS2 is a colorless liquid with an offensive odor. Carbon disulfide vapors are flammable. Comparison of intermolecular forces in CO2 and CS2 at room temperature: Carbon dioxide is a linear molecule with one carbon atom and two oxygen atoms. CO2 is a colorless, odorless gas at room temperature.

The intermolecular forces in CO2 are dispersion forces or London forces, which are the weakest of all intermolecular forces. Dispersion forces exist between all molecules and atoms. They are induced by temporary dipoles that arise from the random movement of electrons. As a result, CO2 has low boiling and melting points. Carbon disulfide is a nonpolar molecule that is linear. At room temperature, it is a colorless liquid with a sulfurous smell.

Carbon disulfide intermolecular forces are dispersion forces, which are the only type of intermolecular forces present in nonpolar molecules. Intermolecular forces in CS2 are somewhat greater than those in CO2, resulting in a higher boiling point than CO2. The greater intermolecular forces in CS2 compared to CO2 are due to the greater polarizability of sulfur compared to oxygen, despite the fact that both molecules are nonpolar.

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The mass of CaCl₂ in grams that is required to react completely with 40.8 g of K₃PO₄ is 20.4 g.

An equation is a mathematical statement that describes the equality of two expressions. Equations are typically expressed using symbols and mathematical operators and can contain constants, variables, and functions. Equations are commonly used to model real-world problems and can be used to describe the relationships between different physical or mathematical phenomena. In mathematics, equations are often used to solve for unknowns or to find the maximum or minimum value of a function.

The balanced equation for the reaction between \(CaCl_2 (aq) and K_3PO_4 (aq) is: 3CaCl_2 (aq) + 2K_3PO_4 (aq) \rightarrow Ca_3(PO_4)_2 (s) + 6KCl (aq)\)

We can use this equation to calculate the mass of CaCl₂ in grams that is required to react completely with 40.8 g of K₃PO₄. Since the ratio of CaCl₂ to K₃PO₄ is 3:2, we can divide 40.8 by 2 to get the mass of CaCl₂ required: 40.8/2 = 20.4 g of CaCl₂.

Therefore,The mass of CaCl₂ in grams that is required to react completely with 40.8 g of K₃PO₄ is 20.4 g.

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Answer:

Protons and neutrons

Explanation:

In the nucleus of an atom only the protons and neutrons are present. The extra-nuclear space is filled with electrons which are negatively charged.

Only two of the subatomic particles are found in the nucleus of an atom. The particles are protons and neutrons.

Answer:

Protons and Neutrons

Explanation:

Bases can be formed by the direct combination of the elements that form the bases.

Bases are substances that react with acids to form salt and water only.

Bases are usually oxides or hydroxides of metals.

Bases have the property of turning red litmus blue.

The formation of a base will involve the direct combination of the constituent elements.

For example, the formation of the bases magnesium oxide and ammonia is shown below:

Ammonia: N₂+ 3 H₃ ---> 2 NH₃

Magnesium oxide: 2 Mg + O₂ ---> MgO

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In other words, group 1 elements produce 1+ ions, followed by group 2 elements producing 2+ ions, and so on. Elements frequently generate anions with such a negative charge.

To sum up, the table is crucial because it is set up to offer a wealth of knowledge on elements and their interactions in a single, convenient source. Even qualities of atoms that have not been found can be predicted using the table.

The periodic table contains around 94 elements that are found in nature. The other components are all wholly synthetic. According to some sources, more elements are found in nature because heavier elements may migrate between them during radioactivity. The first atom to be created artificially was technetium.

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