How many grams of calcium are required to free 8 grams of hydrogen gas from hydrochloride acid, HCl?

Answer:

In Tcl the words in a command are always exposed to two layers of interpretation: First, Tcl interprets them and prepares them as arguments to a routine. Second, the routine interprets those arguments according to its own principles. double substitution occurs when Tcl performs substitutions on original command and a routine then performs substitutions on the resulting arguments. Care is required in these cases to avoid errors, including vulnerability to injection attacks.

Explanation:

this probably wont help but here

The answer for the following problems is mentioned below.

Explanation:

Mole:

The mass of a substance containing the same number of fundamental units as there are atoms in exactly 12.000 g of [tex]C^{12}[/tex].

Given:

volume (v) = 4.7 litres

Volume of argon at STP conditions = 22.4 litres

To find:

volume of argon at STP conditions

We know;

n = [tex]\frac{v}{V}[/tex]

where;

n represents the no of moles

v represents the volume of the argon

V represents the volume of argon at STP

volume of the argon at STP conditions is 22.4 litres

So;

n = [tex]\frac{4.7}{22.4}[/tex]

n = 0.20 moles

Therefore the number of moles present in Argon is 0.20 moles.

There are 0.107 moles of Argon gas present in 4.7 liters at STP.

To determine the number of moles of Argon gas present in 4.7 liters at STP (Standard Temperature and Pressure), we can use the Ideal Gas Law, which is given by:

[tex]\[ PV = nRT \][/tex]

where:

- [tex]\( P \)[/tex] is the pressure,

- [tex]\( V \)[/tex] is the volume,

- [tex]\( n \)[/tex] is the number of moles,

- [tex]\( R \)[/tex] is the ideal gas constant, and

- [tex]\( T \)[/tex] is the temperature.

At STP, the conditions are defined as:

- [tex]\( P = 1 \)[/tex] atmosphere (atm),

- [tex]\( T = 273.15 \)[/tex] Kelvin (K).

The value of the ideal gas constant [tex]\( R \)[/tex] is approximately [tex]\( 0.0821 \frac{\text{L} \cdot \text{atm}}{\text{mol} \cdot \text{K}} \)[/tex].

We can rearrange the Ideal Gas Law to solve for n  (the number of moles):

[tex]\[ n = \frac{PV}{RT} \][/tex]

Given that [tex]\( V = 4.7 \)[/tex] liters, we can plug in the values:

[tex]\[ n = \frac{(1 \text{ atm})(4.7 \text{ L})}{(0.0821 \frac{\text{L} \cdot \text{atm}}{\text{mol} \cdot \text{K}})(273.15 \text{ K})} \][/tex]

[tex]\[ n = \frac{4.7}{0.0821 \times 273.15} \][/tex]

[tex]\[ n = \frac{4.7}{22.41} \][/tex]

[tex]\[ n \approx 0.107 \text{ moles} \][/tex]

Therefore, there are approximately 0.107 moles of Argon gas in 4.7 liters at STP.

Answer:

C) in a mixture of gases suck as air, the total pressure is the sum of the individual partial pressure of the gasses in the mixture

Dalton's law, or the law of partial pressures, states that in a mixture of gases, the total pressure is the sum of the individual partial pressures of the gases in the mixture.

The correct answer to the question regarding Dalton's law is that, C) in a mixture of gases such as air, the total pressure is the sum of the individual partial pressures of the gases in the mixture. This is because Dalton's law, also referred to as Dalton's law of partial pressures, states that the total pressure exerted by a mixture of gases is the sum of the partial pressures of each individual gas in the mixture.

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Answer:

the maximum extent of a vibration or oscillation, measured from the position of equilibrium.

Explanation:physics

Amplitude, within a Physics context, describes the maximum displacement from an equilibrium or rest position. It is especially important in the study of waves and sound, affecting the height of waves and the perceived volume of sound respectively.

The term Amplitude in physics refers to the maximum displacement from the equilibrium or rest position. Precisely, it can be defined as the distance from the equilibrium position of the medium to a compression or a rarefaction. For example, in the context of waves, the amplitude is the measurement of the wave's height from the equilibrium position (mid-point or rest point of the wave) to its crest (highest point).

When applied to sound, amplitude refers to the magnitude of compression and expansion in sound waves. Sound with higher amplitudes are perceived as louder, measured in decibels (dB), due to their greater displacement from the point of equilibrium.

The units for measuring amplitude can vary according to the context and can be centimeters, meters, or any other convenient unit of distance. As the Amplitude increases, the intensity or loudness of the wave also increases correspondingly. Therefore, amplitude plays an essential role in determining the characteristics and impact of the wave.

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In the real world, a tertiary consumer can eat many different animals and even plants sometimes. This means that they can actually be carnivorous or omnivorous. Some examples of tertiary consumers include, birds of prey, big cats, and foxes.

Answer:

Explanation:

A nonpolar covalent bond is created when atoms share their electrons equally.

Polar covalent bond is created when atoms share their electrons unequally.

Answer:

There are 0,106 mol of glucose in 19,1g.

Explanation:

First we calculate the weight of 1 mole of Glucose whose molecular formula is C6 H12 0 6, with the atomic weights of each element obtained from the periodic table. Then, by means of a simple rule of three we calculate the moles that are in 19.1 grams:

Weight 1 mol C6H1206 = (Weight C)x 6 + (Weight H)x12 + (Weight 0)x6=

                                       = 12 g x 6 + 1g x12 + 16 g x 6= 180 g/mol

180 g ----1 mol glucose

19,1 g-----x= (19,1 g x 1 mol glucose)/ 180 g= 0,106 mol

Final answer:

To find the number of moles of glucose in 19.1 grams, divide the mass by the molar mass of glucose (180 g/mol), resulting in approximately 0.106 moles.

Explanation:

The student's question is about determining the number of moles of glucose in a given mass of glucose. To calculate this, we need to use the molar mass of glucose, which is 180 g/mol. The mass of glucose given is 19.1 grams.

To find the number of moles, we use the formula:

Number of moles = mass (g) / molar mass (g/mol)

So for glucose, it would be:

Number of moles of glucose = 19.1 g / 180 g/mol

Calculating this gives us:

Number of moles of glucose = 0.106 moles (rounded to three decimal places)

Answer:

500 calories

Explanation:

Heat gained or lost is mass times specific heat times change in temperature. Using this formula, the answer is 500 calories.

Answer:

The answer to your question is 97 ml

Explanation:

Data

volume = ? ml

concentration = 1.01 M LiNO₃

mass = 6.63 g

Process

1.- Calculate the molecular weight of LiNO₃

LiNO₃ = (1 x 6.94) + (1 x 14) + (16 x 3)

          = 6.94 + 14 + 48

          = 69 g

2.- Calculate the moles of LiNO₃

                  69 g ------------------ 1 mol

                  6.63 g ---------------  x

                    x = (6.63 x 1) / 69

                    x = 0.096 moles

3.- Calculate the volume

Molarity = moles / volume

-Solve for volume

Volume = Molarity x moles

-Substitution

Volume = 1.01 x 0.096

-Result

Volume = 0.097 l or 97 ml

The number of mL of of 1.01 M LiNO3 solution when solution has 6.63 g of solute should be  97 ml.

Since

concentration = 1.01 M LiNO₃

mass = 6.63 g

First we have to determine the molecular weight of LiNO₃ i.e.

LiNO₃ = (1 x 6.94) + (1 x 14) + (16 x 3)

         = 6.94 + 14 + 48

         = 69 g

Now  the moles of LiNO₃

  69 g ------------------ 1 mol

6.63 g ---------------  x

x = (6.63 x 1) / 69

x = 0.096 moles

Now the volume is

Molarity = moles / volume

It can be like

Volume = Molarity x moles

= 1.01 x 0.096

= 0.097 l or 97 ml

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The initial temperature of the zinc metal is  720 ° C

Explanation:

Given data,

Zn

m=2.50 g            

C=0.390 J/g° C

ΔT= (22.50° C- Ti)

H2O

m= 65.0 g

C= 4.184 J/ g° C

ΔT = 2.50° C

We have the formula,

qH20= - qZn

(65.0 g) (4.184 J/ g° C) (ΔT 2.50° C)=(2.50 g) ( 0.390 J/g° C) (ΔT 22.50° C- Ti)

solving the equation we get,

697.3 ° C=- 22.50 ° C+Ti

Ti= 720 ° C

The initial temperature of the zinc metal is  720 ° C

Answer:

Explanation:

The blue whale is the largest animal on Earth. The length of a blue whale is about 25 m, although is is said the largest confirmed measure is 29.9m.

The tiny frogs measure about 10mm.

You can estimate the number of tiny frogs that have the same length as a blue whale dividing the approximate average length of a blue whale by the approximate average length of the tiny frogs.

First convert 25m to mm:

Now, divide:

Hence, about 2,500 tiny frogs sitting next to each other would measure the same length as a blue whale.

Answer:

LOOK BELOW

Explanation:

Well a female is 82ft and a male is 79ft so we will just go with both answers. A tiny frog is about a estimate length of 0.27 inches so you would have to divide and or multiply 82 by 0.27 getting your first length then do the same with teh next one and thats you answer! hope i helped bby :3

Answer:

1.6 moles of iron

Explanation:

-Metals reacts with oxygen to form oxides.

-The chemical reaction between oxygen and iron is written as below:

[tex]4Fe_{(s)}+3O_2_{(g)}->2Fe_2O_3_{(s)}[/tex]

-pu notice from the balanced chemiocal equation above that the mole ration of iron to oxygen is 4:3

-We equate and cross multiply to find moles of iron in the reaction;

[tex]Fe:O_2=4:3\\\\\\\frac{Fe}{O_2}=\frac{4}{3}\\\\\frac{Fe}{1.2}=\frac{4}{3}\\\\Fe=\frac{4\times 1.2}{3}\\\\=1.6\ moles[/tex]

Hence, 1.6 moles of iron reacts with 1.2 moles of oxygen in the above reaction.

To calculate the number of moles of iron required to react with 1.20 mol of oxygen to produce iron(III) oxide, you need to determine the stoichiometric mole ratio from the balanced chemical equation. The ratio is 1 mole of iron to 1.5 moles of oxygen, which can be multiplied by 2 to get the balanced equation.

To calculate the number of moles of iron required to react with 1.20 mol of oxygen to produce iron(III) oxide, you need to determine the stoichiometric mole ratio from the balanced chemical equation. Based on the equation, the ratio is 1 mole of iron to 1.5 moles of oxygen. Since the ratio is not a whole number, you need to multiply it by 2 to get the smallest possible whole number subscripts while maintaining the correct iron-to-oxygen ratio. Therefore, the balanced equation is: 2 Fe + 1.5 O₂ → Fe₂O₃.

Answer:

The answer to your question is 51.2 g of H₃PO₄

Explanation:

Data

mass of Ca₃(PO₄)₂ = 153 g

mass of H₂SO₄ = 76.8 g

mass of H₃PO₄ = ?

Balanced chemical reaction

               Ca₃(PO₄)₂  +  3H₂SO₄  ⇒   3CaSO₄  +  2H₃PO₄

Process

1.- Calculate the molar mass of the reactants

Ca₃(PO₄)₂ = (3 x 40) + (2 x 31) + (8 x 16) = 120 + 62 + 128 = 310 g

H₂SO₄ = (1 x 2) + (32 x 1) + (16 x 4) = 2 + 32 + 64 = 98 g

2.- Calculate the limiting reactant

Theoretical yield Ca₃(PO₄)₂ / H₂SO₄ = 310 / 3(98) = 1.05

Experimental yield Ca₃(PO₄)₂ / H₂SO₄ = 153 / 76.8 = 1.99

The limiting reactant is H₂SO₄ because the experimental proportion was higher than the theoretical proportion.

3.- Calculate the molar mass of H₃PO₄

H₃PO₄ = (1 x 3) + (31 x 1) + (16 x 4) = 3 + 31 + 64 = 98 g

4.- Calculate the mass of H₃PO₄

                3(98) g of H₂SO₄ ------------------ 2(98) g of H₃PO₄

                 76.8 g of H₂SO₄ ------------------  x

                        x = (76.8 x 2 x 98) / (3 x 98)

                        x = 15052.8 / 294

                       x = 51.2 g of H₃PO₄

The vapor pressure of a solution with a dissolved ionic compound is less than the vapor pressure of pure water. To determine the molecular formula of the compound Xy, calculate the moles of Xy using its total mass and molar mass, then find the subscript y for the number of Y atoms or groups present.

When a chemist dissolves an ionic compound in water, the vapor pressure of the solution is less than the vapor pressure of pure water. This phenomenon is explained by Raoult's law, which states that the vapor pressure of a solvent above a solution is lowered by the presence of a non-volatile solute. In the given question, after dissolving 110 g of substance Xy in 500 g of water, the vapor pressure drops from 17.5 mmHg to 15.0 mmHg. This decrease is due to the solute particles in the solution, which interfere with the evaporation process of the solvent (water) molecules.

To determine the molecular formula of the substance Xy, you first need to calculate the number of moles of Xy. Then, use the total mass of Xy and its molecular mass to find the number value of the subscript y in the molecular formula. Here's how the calculation is done:

Answer: The answer is c

Explanation:

Answer:

The answer to your question is 8.1 g of ZnCl₂

Explanation:

Data

mass of ZnCl₂ = ?

mass of Zn = 7.0 g

mass of CuCl₂ = 8 g

Balanced chemical reaction

                Zn  +  CuCl₂   ⇒   ZnCl₂  +  Cu

Process

1.- Calculate the molar mass of the reactants

Zn = 65.4 g

CuCl₂ = 63.6 + (35.5 x 2) = 134.6 g

2.- Calculate the limiting reactant

theoretical yield  CuCl₂ / Zn = 134.6/65.4 = 2.06

experimental yield CuCl₂ / Zn = 8/7 = 1.1

The limiting reactant is CuCl₂ because the experimental yield was lower than the theoretical yield.

3.- Use proportions to calculate the mass of ZnCl₂

molar mass of ZnCl₂ = 65.4 + (35.5 x 2) = 136.4 g

                  134.6 g of CuCl₂ ---------------- 136.4 g of ZnCl₂

                      8   g                 ----------------  x

                      x = (8 x 136.4) / 134.6

                      x = 8.1 g of ZnCl₂

The question relates to the ideal gas law in chemistry, which connects the pressure, volume, temperature, and number of moles of hydrogen gas in a given scenario.

The student's question involves a sample of hydrogen gas (H2), which is placed in a 0.500 L container at a temperature of 295 K with a pressure of 1.442 bar. This scenario typically deals with concepts such as gas laws and molar calculations from chemistry, specifically the ideal gas law, which relates the pressure, volume, temperature, and number of moles of a gas.

To solve problems like this, one would normally use the ideal gas law equation: PV = nRT. However, without the number of moles or the specific R constant provided, one cannot calculate the moles directly. Additional information or a different question that involves changing conditions where the ideal gas law can be applied might be necessary.

Answer:

C) It contains little or no HA.

Explanation:

Answer:

It's because the perfume bottle contains ethyl alcohol.

Answer:

The answer to your question is Combustion

Explanation:

Chemical reaction

                 2C₄H₁₀  +  13 O₂  ⇒   8 CO₂  +  10 H₂O

A combustion reaction is a chemical reaction in which the reactants are always a molecule with carbon (organic molecule) and oxygen (O₂), and the products are always carbon dioxide (CO₂) and water (H₂O).

Conclusion

The chemical reaction of this problem is combustion

Answer:

1. The salt bridge completes the circuit of the voltaic cell to allow the flow of current

2. The porous divider performs the function of a salt bridge, hence a salt bridge is unnecessary in a single-beaker voltaic cell

Explanation:

1. The oxidation and reduction half cells of a voltaic cell are connected by the salt bridge in other to ensure that the internal circuit is electrically neutral, to avoid the rapid reaction to reach equilibrium conditions which affects results in preventing voltage drop in the voltaic cell.

The salt bridge also aids in charge accumulation

2. In a single-beaker voltaic cell with the compartments separated by a porous divider, the function of the porous divider is the same as that of the salt bridge, hence the salt bridge is unnecessary.

Answer:

Explanation:

A salt bridge is a strong electrolytes and it's ion like KNO3,Consider a voltaic cell with two paths the anode half cell and the cathode half cell,it will be observed that when the cell is connected,electrons leaves through the wire from the anode which is subject to oxidation hence producing both electrons and positive ions in the anode,if more of the electrons leaves the anode,need arises to to ensure electrochemical neutrality in the cell,this is we're the salt bridge is much important because it provides the needed negative ions to counter balance the effect of this,also a reversed process occurs in the second half Cathodoc cell.

Also for a simply voltaic cell separated by a porous membrane the salt bridge is not needed because unlike the half cell connected by a salt bridge the porous membrane servea as a media of exchange of ions for the cells.

Answer:

Question is incomplete, the complete question is;

Zinc granules on treating with an acid X, form the zinc sulphate (ZnSO4) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle. Identify the acid X and gas evolved Y.

Answer is;

Acid X is sulfuric acid (H₂SO₄) and the gas evolved Y is hydrogen (H₂).

Explanation:

Acids react with metals to produce a salt and hydrogen. The metal ions replace the hydrogen ions in the acids.  

When Zinc (Zn) granules are treated with sulfuric acid (H₂SO₄), the products are zinc sulfate (ZnSO₄) and hydrogen (H₂).

H₂SO₄ + Zn → ZnSO₄ + H₂

This reaction is a redox reaction, where reduction and oxidation happen at the same time. Zinc atoms are oxidized since they lose electrons (Zn → Zn²⁺ + 2e⁻), and hydrogen ions are reduced since they gain electrons (2H⁺ + 2e⁻ → H₂).  

Hydrogen is a highly flammable gas, which reacts with oxygen molecules to produce water, combined with an explosive release of energy. But a source of energy like a small spark is needed for this reaction to take place since hydrogen does not react with oxygen at room temperature.

The activation energy (energy required for a reaction to proceed) of hydrogen is low, so only a small amount of energy is needed to trigger a reaction with oxygen. When hydrogen is brought near to a burning candle, it reacts with oxygen in the air in a small explosion by producing a squeaky pop sound.

In the question, Zinc granules are treated with an acid X to form zinc sulfate (ZnSO₄) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle. So, now it is clear that the acid X is sulfuric acid (H₂SO₄) and the gas evolved Y is hydrogen (H₂).

Answer:

Coal-fired plants produce electricity by burning coal in a boiler to produce steam. The steam produced, under tremendous pressure, flows into a turbine, which spins a generator to create electricity. The steam is then cooled, condensed back into water and returned to the boiler to start the process over.

Explanation:

Answer:

The answer is community

I got it correct

Explanation:

Answer:

community is the answer

Explanation:

Answer:

true

Explanation:

Answer: True

Explanation: Because the large company has more people and is making more money than the smaller company

Answer:

1.) 2

2.) 5

3.)1

4.)3

5.)4

Explanation:

this in edge 2020

The solution ranked with the presence of hydronium ion concentration from higher to lower is  pH = 1.05 > [OH⁻] = 4.35 * 10 ⁻² >  [H₃O⁺] = 3.16 * 10⁻⁴ M > pOH = 7 > pOH = 4.

The pH and pOH can be given as the logarithmic value of the presence of hydrogen or hydronium and hydroxide ion concentration in a solution respectively.

The hydronium ion concentration can be given as:

[H₃O⁺] = antilog (-pH)

[H₃O⁺] = 10⁻¹.⁰⁵

[H₃O⁺] = 0.089 M

The pH from pOH can be calculated as:

pH = 14 - pOH

pH = 14 - 7

pH = 7

The hydronium ion concentration can be given as:

[H₃O⁺] = 10⁻⁷

[H₃O⁺] = 1 * 10⁻⁷ M

pH = 14 - 4

pH = 10

The hydronium ion concentration can be given as:

[H₃O⁺] = 10⁻¹⁰

[H₃O⁺] = 1 * 10⁻¹⁰ M

Thus, the solutions from highest to lowest hydronium ion concentration can be ranked as:

pH = 1.05 > [OH⁻] = 4.35 * 10 ⁻² >  [H₃O⁺] = 3.16 * 10⁻⁴ M > pOH = 7 > pOH = 4.

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Answer:

Both a and b

Hope this answer helps you

Final answer:

Energy is the ability to do work or cause change and comes in many forms like mechanical, electrical, kinetic, and potential. It is a fundamental concept in physics, involving the transfer and conservation of energy in various processes.

Explanation:

What is Energy?

Energy is a fundamental concept in physics, often defined as the capacity to do work or cause change. The scientific concept of work corresponds to applying a force over a distance, like pushing a heavy object across the floor or lifting a weight. Energy can also be transferred and recognized in other forms, such as heat or light. There are various forms of energy, such as mechanical, electrical, kinetic, and potential energy. For instance, when inflating a bicycle tire, we do work by moving air against the resistance of the air already in the tire, exemplifying mechanical work.

In a broader sense, energy enables the movement of matter and the execution of actions, and it is conserved in physical processes, converting from one form to another but never disappearing.