How many total moles of ions are released when the following sample dissolves completely in water?

9.44 g of CuSO4 · 5H2O: mol

The mass of Ca CO₃ produced by reacting 2.41 dm³ of 2.33 x 10-2 mol dm-3 of Ca(OH)₂ (aq) with 0.750 dm³ of CO₂ (g) at STP is  30353 g.

The nominal atmospheric conditions at sea level are referred to as "standard temperature and pressure" (STP). The temperature and pressure are both zero degrees Celsius (atm). The STP value is crucial for many professionals, including physicists, chemists, engineers, pilots, and navigators.

1 dm³ = 1L

2.41 dm³=2.41 L

Moles of Ca(OH)₂ = m M. vol (L)

= 2.33×10⁻²m ×2.41 =5.6153  10⁻²Mol

Moles of CO₂ (n) = [tex]\frac{PV}{RT}[/tex] = [tex]\frac{(1 atm) . (0.75L)}{(0.032).(1atm).(273k)x^{2} k^{-1} ml}[/tex]

Moles of CO₂ (n) = 0.0335 mol

          Ca(OH)₂     +      CO₂      ⇒        Ca CO₃     +        H₂O

[tex]I_{mol}[/tex]    5.6153×10⁻²     0.0335mol         0

C         0.0335mol       -0.0335mol      0.0335mol

⇒         0.022653        0                       0.0335mol

Mass of Ca CO₃ = Moles × Molar mass

Mass of Ca CO₃ = 0.0335 mol ×100.0869 g/mol

Mass of Ca CO₃ = 30353 g

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Assuming the concentration of the NaOH solution that reacted with the sulfuric acid is 1.0 M, the mass of the sulfuric acid that reacted is 3.01 g.

A neutralization reaction is a reaction in which an acid reacts with a base to form salt and water only.

In the given reaction, a given amount of sulfuric acid was neutralized by 61.37 m:L of a NaOH solution.

The equation of the neutralization reaction is given below:

2 NaOH (aq) + H₂SO₄ (aq) ----> Na₂SO₄ (aq) + 2 H₂O (l)

The mole ratio of the reaction shows that 2 moles of NaOH solution will react with 1 mole of H₂SO₄ solution.

The moles of NaOH reacting = concentration * volume in liters

The concentration of the NaOH solution is not given. Assuming the concentration of the NaOH solution is 1.0 M

Moles of NaOH reacted = 1.0 * 61.37 mL * 1 L / 1000 mL

Moles of NaOH reacted = 0.06137 moles

Moles of  H₂SO₄ reacted = 0.0614 / 2

Moles of  H₂SO₄ reacted = 0.0307 moles

Mass of  H₂SO₄ reacted = 0.0307 * 98.09

Mass of  H₂SO₄ reacted = 3.01 g

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For the grape juice, we get that the hydroxyl ion concentration is  1.4 ×10-10M.

Hence, pOH will be = -log[1.4*10⁻¹⁰] which is approximately 9.6.

Now the value of pH will be = 14-pOH = 14 - 9.6 = 4.4.

For the orange juice, we know that the H+ or hydronium ion concentration is  1.8 × 10-4 M.

Then, the value of the pH will be= -log[1.8*10⁻⁴]=3.7.

Thus from the above result, it is clear that the range juice has lower pH, hence it will be more acidic. While the grape juice will be less acidic.  

The pH can either go up or down depending on the change in hydronium concentration. If the hydronium concentration increases, the pH decreases, causing the solution to become more acidic. This happens when an acid is introduced. As H+ ions dissociate from the acid and bond with water, they form hydronium ions, thus increasing the hydronium concentration of the solution. If the hydronium concentration decreases, the pH increases, resulting in a solution that is less acidic and more basic. This is caused by the OH^- ions that dissociate from bases

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Density=mass/volume

d=6.2/4.4

d=1.40 grams/cm³

The concentration of species in the reaction changes the reaction in the following ways: decrease carbon dioxide = forward direction of reaction.

The direction of the reaction can be assessed by the following.  On increasing the concentration of the reactant the reaction processes in the forward direction. On increasing the concentration of product the reaction processes in the backward direction.  

The given equilibrium is:

2CO(g) + O2(g) ↔ 2CO2(g)

increase CO = forward direction of reaction  

increase oxygen = forward direction of reaction

decrease CO = no change in equilibrium as reaction not processes.  

decrease oxygen = no change in equilibrium as reaction not processes.  

increase carbon dioxide= reverse direction  

decrease carbon dioxide = forward direction of reaction.

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To solve such this we must know the concept of chemical reaction and concept of limiting agent. Therefore, C[tex]_2[/tex]H[tex]_3[/tex]O[tex]_2[/tex]H is limiting agent in the given balanced equation.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

The balanced reaction is

3 C[tex]_2[/tex]H[tex]_3[/tex]O[tex]_2[/tex]H + Al(OH)[tex]_3[/tex][tex]\rightarrow[/tex]

The limiting reagent depends on the mole ratio and not on the masses of the reactants present. 1 mole of  Al(OH)[tex]_3[/tex] need 3 moles of 3 C[tex]_2[/tex]H[tex]_3[/tex]O[tex]_2[/tex]H. So, C[tex]_2[/tex]H[tex]_3[/tex]O[tex]_2[/tex]H is limiting reagent.

Therefore, C[tex]_2[/tex]H[tex]_3[/tex]O[tex]_2[/tex]H is limiting reagent.

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The full burning of 6.70x10-3 g of methane results in the production of 2.95872 mass of carbon dioxide.

Burning is sometimes referred to as combustion. A fuel is heated and interacts with oxygen in a combustion reaction. The three elements of fuel, heat, and oxygen required for combustion are summarized by the fire triangle.

Chemical processes that occur during combustion are frequently quite exothermic. The energy of chemical molecules generated during this reactive process is used by combustion systems to power vehicles, produce electricity, or heat a variety of uses.

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The way that scientists predict how much of a product can be formed is through the use of Stoichiometry.

The quantitative examination of the constituents of a chemical process is known as chemical stoichiometry. The Greek words "stoikhein" (which means element) and "metron" (which means measure) are the roots of the English word "stoichiometry."

Stoichiometry describes the correlation between the amounts of reactants and products before to, during, and after chemical processes.

Therefore, the quantity of the generated good is predicted by stoichiometry. To calculate how many S'more "reactants," for instance, we employed stoichiometry.

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At constant temperature and pressure, 100mL of ammonia will be produced.

Ammonia is described as an inorganic compound of nitrogen and hydrogen with the formula NH₃. It is a stable binary hydride, and the simplest pnictogen hydride, ammonia is a colorless gas with a distinct pungent smell.

Gay-Lussac's law of combining volumes states that the volume of gases which take part in a chemical reaction bear a simple whole number ratio to one another and to the volume of products if gaseous, when measured at constant temperature and pressure.

According to the Equation of reaction: N₂(g) + 3H₂(g) ----> 2NH₃(g)

From the equation of reaction given above,

1 mole of nitrogen gas reacts with 3 moles of hydrogen to produce 2 moles of ammonia. Therefore,

50 mL of nitrogen will react to produce produce 2 * 50 mL of ammonia = 100ml of ammonia

Also, 150mL of hydrogen will react to produce 2 *150mL/3 of ammonia = 100ml of ammonia.

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It is pseudoscience because each metal is known to be a unique element alchemy is a science or pseudoscience.

Matter is anything that occupies space and has mass; in other respects, matter is the "thing" that the cosmos is made of. The fundamental constituents of all stuff are called elements. These are not changed into other elements by conventional chemical processes and have distinct chemical and physical properties.

Matter can be solid, liquid, or gaseous on Earth. Solid particles, fluids, and gases are supported by the exceptionally small building components known as atoms and molecules. A solid's component particles are attracted to one another strongly. They are close to one another and vibrate en position without passing each other.

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The complete question is -

Alchemy is a branch of ancient knowledge that states that all matter is composed of air, fire, earth. Which of these best explains whether alchemy is a science or pseudoscience?

A-It is a science because all matter is known to be made of elements.

B-It is a science because air, fire, earth, and water all are forms of matter.

C-It is pseudoscience because all matter is known to be made of atoms.

D-It is pseudoscience because ancient knowledge is mystical yet reliable.

E-It is pseudoscience because each metal is known to be a unique element.

An object is placed in 20 mL of water. This water rose to a level of 26 mL. The object has a mass of 18 g. the density of the object is 3 g/mL.

given the data as follows :

mass of object  =  18 g

volume of object = final volume - initial volume

volume of object = 26 mL - 20 mL

                             = 6 mL

the density expression is given as:

Density = mass / volume

Density = 18 g / 6 mL

Density = 3 g/mL

Thus, An object is placed in 20 mL of water. This water rose to a level of 26 mL. The object has a mass of 18 g. the density of the object is 3 g/mL

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The mass of 45.0 L of Cl₂ at 87.0° C and 950 mm Hg is 134.7214 g.

Volume = 45.0 L

Temperature =  = (87.0 + 273) K = 360 K

Pressure = 950 mm Hg (1 mm Hg = 0.00131579 atm) = 1.25 atm

The formula used to calculate moles is as follows.

∴PV = nRT

where,

P = pressure

V = volume

n = no. of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the values into the above formula as follows:

 ∴ PV = nRT

=> 1.25 atm × 45.0 L = n × 0.0821 L atm/mol K × 360K

=> n = 1.25 atm × 45.0 L / n × 0.0821 L atm/mol K × 360K

=> n = 56.25 / 29.556 mol

=> n = 1.90 mol

Moles is the mass of a substance divided by its molar mass. So, the mass of Cl₂ (molar mass = 70.906 g/mol) is calculated as follows:

∴  Moles = mass / molar mass

=> 1.90 mol = mass /  70.906 g/mol

=> mass = 134.7214 g

Thus, we can conclude that the mass of 45.0 L of Cl₂ at 87.0° C and 950 mm Hg is 134.7214 g.

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Answer:

Don't follow this!

Explanation:

Your chemistry teacher knows that you are cheating and using this as your own work.

-From said teacher!

Answer:

0.0833 M NaOH

Explanation:

To calculate the molarity, you need to

(1) convert grams NaOH to moles (using the molar mass)

(2) convert mL to liters

(3) calculate the molarity

It is important to arrange the ratios/conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs like the given value with the smallest amount of sig figs (0.499 = 3 sig figs).

 0.499 g NaOH              1 mole
--------------------------  x  ------------------  =  0.0125 moles NaOH
                                       40.00 g

 150.00 mL H₂O                  1 L
---------------------------  x  ------------------  =  0.15000 L H₂O
                                        1,000 mL

Molarity = moles / volume

Molarity = 0.0125 moles NaOH / 0.15000 L H₂O

Molarity = 0.0833 M

The statement that explains which component is likely to be more powerful in explaining a scientific phenomenon is:

Scientific knowledge refers to the body of knowledge that is obtained by the scientific method.

The scientific method refers to a series of steps that scientists follow in their discovery and explanation of natural phenomena.

The scientific method is as follows:

Hence, scientific knowledge must explain universal occurrences ad must be testable.

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The force acting on a moving body can be determined using its acceleration and mass. The mass of the object is 2.3 Kg the force when it is accelerated to 38.6 m/s in 37 seconds is 2.4 N.

Force is an external agent acts on a body to change it from the state of motion or rest. Various kinds of forces include gravitational force, frictional force, nuclear force etc.

In physics, force is the product of mass and acceleration. Acceleration of an object is the rate of change in its velocity. Here, the change in speed from rest is 38.6 m/s and the time taken is 37 seconds hence the acceleration is:

a = 38.6 m/s / 37 s

  = 1.04 m/s².

Now, the force can be calculated from by taking the product of mass and acceleration as follows:

F = ma

  = 2.3 Kg × 1.04 m/s²

  = 2.4 N.

Hence, the force acting on the object to change it from rest is 2.4 N.

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Specific heat capacity of a substance is the amount of heat required to raise the temperature by one degree Celsius of one gram of a substance. Therefore, 13.12KJ of heat is required to melt 39.4 g of ice at (0 ∘C ).

Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Mathematically, Enthalpy is directly proportional to specific heat capacity of a substances.

Mathematically,

q = n ×ΔH

where

q = amount of heat= ?

n = no of moles

ΔH = enthalpy  ( 6.02 kJ/ mol)

n = w / M.M

w = given mass =39.4g

M.M = molar mass ( molar mass of water)=18g/mol

n =39.4/ 18

 =2.18

Substituting all the given values, we get

q = n ×ΔH

   = 2.18 ×6.02

   = 12.401 kJ

   =13.12KJ

Therefore, 13.12KJ of heat is required  to melt 39.4 g of ice at (0 ∘C ).

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The bond enthalpy of F2(g) is 156.9 kJ/mole. The ΔH o f for F(g) is 78.5 kJ/ mole.

Bond enthalpy is defined as the amount of energy needed to dissolve one mole of a certain type of bond between two gaseous atoms.  In general, the amount of energy acquired or lost during a reaction is comparable to the process's change in enthalpy.

Given the bond enthalpy of F2 = 156.9 kJ/ mole

The ΔH can be calculated as

ΔH = bond enthalpy of F2 / 2

ΔH = 156.9 kJ/mole / 2

ΔH = 78.5 kJ/mole

Thus, the bond enthalpy of F2(g) is 156.9 kJ/mole. The ΔH o f for F(g) is 78.5 kJ/ mole.

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Answer:

Cu(NO3)2 (aq) + K2CO3 (aq) => CuCO3 (s) + 2KNO3 (aq)

Explanation:

I interpret your question is how to balance the above reaction, right?

Cu(NO3)2 (aq) + K2CO3 (aq) => CuCO3 (s) + 2KNO3 (aq)

Cu: 2

NO3: 2

K: 2

CO3: 2

NADP, nicotinamide adenine dinucleotide phosphate forms NADPH by combining with the H+ ion and two electrons. Thus, option C is correct.

NADP, nicotinamide adenine dinucleotide phosphate is a reducing agent in electron transport chains of metabolic processes in living things. NADPH is the reduced form of NADP.

In biochemical reactions such as glycolysis, photosynthesis etc, NADP plays a significant role as a reducing agent. NADP and NADPH together are called the redox couple and they maintain cellular redox homeostasis.

Hydrogenation of molecules is called reduction and thus the NADP+ reduces to its NADPH by combining with a two electrons and H+. Hence option C is correct.

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The volume that was started with if the temperature of 126 K in a container with a pressure of 31 atm is 3.47L.

The volume of a gas can be calculated using the combined gas law equation as follows:

P₁V₁/T₁ = P₂V₂/T₂

Where;

According to this question, an unknown volume of gas held at a temperature of 126K in a container with a pressure of 31 atm.

If by increasing the temperature to 209 K and decreasing the pressure to 19 atm causes the volume of the gas to be 9.4 liters, the initial volume is calculated as follows:

31 × V₁/126 = 19 × 9.4/209

0.246V = 178.6/209

0.246V = 0.854

V = 3.47L

Therefore, 3.47L is the volume of the gas that started.

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Answer:

The colors observed is a sign that definite energy transformations occurs inside the atom gives off light. It follows that electrons must occupy orbits of fixed energy.

Hope that helps!

Answer: C. A tornado is much smaller

Explanation: A tornado can be a mile long while hurricanes can be 50 miles long.

The reaction that is balanced and shows incomplete combustion is:

2 C₅H₁₂ + 11 O₂--> 10 CO + 12 H₂0; option B.

A combustion reaction is a reaction in which a substance reacts with oxygen to release large amounts of heat and light energy.

In the combustion of carbon-containing compounds, carbon dioxide and water are usually produced.

In incomplete combustion of carbon compounds, carbon monoxide or carbon (ii) oxide is produced.

For a balanced reaction, the moles of atoms of elements on the reactant side are equal to the moles of atoms on the product side.

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The compound with the chemical formula PbBr₄ is called lead(IV) bromide.

Lead(IV) bromide is an inorganic compound composed of the elements lead (Pb) and bromine (Br). The compound is named based on the oxidation state of lead, which is +4 in this case.

In naming compounds, the Roman numeral in parentheses after the element name indicates the oxidation state of the metal. In the case of lead(IV) bromide, the Roman numeral IV indicates that lead is in the +4 oxidation state. This means that lead has lost four electrons to achieve a stable configuration.

The name "lead(IV) bromide" accurately represents the composition and oxidation state of the compound. It is worth noting that lead(IV) bromide is a relatively unstable compound and is not commonly encountered in practical applications.

Hence, the name of the compound is lead(IV) bromide.

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The volume of water that must be added to 15 mL of sodium chloride solution 23.4% to dilute the ​concentration to 0.06 mmol/mL is 999985 mL.

The concentration of 23.4% sodium chloride solution in mol/L is calculated as follows:

23.4% solution = 23.4 g/100 mL solution

23.4 g/100 mL = 234 g/L

molar mass of NaCl = 58.5

Molarity of the NaCl solution = 234 / 58.5

Molarity = 4 mol/L

Using the dilution formula:

C₁V₁ = C₂V₂

where;

C₁ is the initial concentration = 4 mol/L or 4000 mmol/L

V₁ is the initial volume = 15 mL

C₂ is the final concentration = 0.06 mmol/L

V₂ is final volume = ?

V₂ = 4000 * 15 / 0.06

V₂ = 1000000 mL

Hence, the volume of water to be added will be:

1000000 - 15 = 999985 mL

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The figures illustrate the law of multiple proportions because the empirical formulas of the two oxides are CO and [tex]CO_2[/tex] respectively.

The law of multiple proportions states that when two elements combine with each other to form more than one chemical compound, the weights of one element that combine with a fixed weight of the other are usually in small whole-number ratios.

The figures mentioned in the problems can be tested for agreement with the law of multiple proportions by finding the empirical formulas of the two oxides formed against a fixed weight of carbon:

The analysis of the first oxide is as follows:

C = 42.9

O = 100-42.9

   = 57.1

The equivalent mole of each atom will then be calculated by dividing each atom by their respective molar weights:

C = 12 g/mol

O = 16 g/mol

C = 42.9/12

  = 3.56

O = 57.1/16

   = 3.56

Thus, the empirical formula of the first oxide is CO.

The second oxide:

C = 27.3

O = 100 - 27.3

   = 72.7

The equivalent mole of each atom will be:

C = 27.3/12

  = 2.27

O = 72.7/16

   = 4.54

Dividing the moles by the smallest mole

C = 2.27/2.27

  = 1

O = 4.54/2.27

   = 2

Thus, the empirical formula of the second oxide is [tex]CO_2[/tex].

The first oxide gives CO while the second oxide gives  [tex]CO_2[/tex]. The weight of oxygen that combines with the fixed weight of carbon can be seen to be in simple whole-number ratios (1 and 2).

In other words, the figures quoted obeys the law of multiple proportions.

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The seventh shell contains 49 orbitals, making the total number of electrons in 49 orbitals 98.

characteristics of elements in group 7

At room temperature, each halogen exhibits the properties listed below: A light yellow gas is fluorine. A deadly green gas, chlorine is poisonous. The reddish-brown liquid bromine is poisonous.

Since the group number is 7, this means that the outer shell of halogen atoms contains seven electrons (energy level). These atoms gain a single electron in order to stabilize themselves and adopt the same structure as the nearby noble gas (rather than losing seven electrons which would take much more energy).

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1.6987 grams the silver nitrate crystals is weighed, 100 mL of water is measured, and the weighed silver nitrate is dissolved in the measured amount of water.

We are to prepare a 0.1 M silver nitrate solution given the following:

First, we need to make some calculations to make the amount of silver nitrate and water that will be used.

0.1 M means 0.1 mol silver nitrate crystal in 1 L of water. However, we only have a 100 mL volumetric flask. We need to know the mol amount that will be equivalent to 100 mL of water.

0.1 mol = 1000 mL

100 mL = 100 x 0.1/1000

            = 0.01 mol

Mole = mass/molar mass

Molar mass of silver nitrate = 169.87 g/mol

0.01 mol silver nitrate = 0.01 x 169.87

                                    = 1.6987 grams

Thus, 1.6987 grams of silver nitrate would be weighed.

The following steps would be taken to prepare the solution:

What you will have is 100 mL of 0.1 M silver nitrate solution.

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The internal energy of a human body is the net energy contained in the body due motion of its particle or molecules.

In a human body the internal energy is stored . It increases when the temperature of the body rises, or when the body observes some changes. Internal energy we can say that is the sum of kinetic and potential energy of all particles in the body.

Internal energy is a state function of a system and is an extensive quantity. Every substance possesses a fixed quantity of energy which depends upon  its chemical nature and also on its state of existence. Every substance have a definite value of Internal energy.

The change in the Internal energy of a reaction may be considered as the difference between the internal energies of the two states.

ΔU = [tex]E_{B}[/tex] - [tex]E_{A}[/tex]     where [tex]E_{B}[/tex] and [tex]E_{A}[/tex] are the initial energies of states A and B. Or we can also write the equation as:

ΔU = ΔE

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Have two sides that mirror each other along one plane through the central axis called as symmetrical

The line of centroids or central axis is defined as the line that passes through the centroids along the beam and the cross section are then defined as the beam section which are perpendicular to the central axis and that two side are mirror images of each other and place a mirror on the fold then image of one side of the picture will fall exactly on the other side of the picture and that are called as symmetrical means same

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