what mass of ZnCI2 can be prepared from the reaction of 3.27 grams of zinc with 3.30 grams of HCI?
Zn + 2HCI —-> ZnCI2 + H2

Answer:

V₂ = 2.0 Liters at STP conditions

Explanation:

Solving problem using the combined gas law

Given:

Case I Conditions           Cast II Conditions

P₁ = 825mmHg                P₂ = 760mm

V₁ = 2.30 Liters                V₂ =  ?  

T₁ = 70°C + 273 = 343K    T₂ = 0°C = 273K                  

Substitute into combined gas law assuming moles of gas remains constant; solve for unknown volume under case 2 conditions

P₁·V₁/n₁·T₁ = P₂·V₂/n₂T₂ => V₂ = P₁·V₁·T₂ / P₂·T₁  => note: in this solution, moles of gas remains constant as is disregarded in final calculation.

V₂ = (825mm)(2.3L)(273K) / (760mm)(343K) = 1.987 Liters (calculator answer) ≅ 1.9 Liters (2 sig figs based on given volume (V₁)

V₂ = 1.987 Liters ≅ 2.0 Liters (2 sig figs based on given volume (V₁)                    

C/ If Fe is greater than Fg, the negatively charged oil droplet will move freely toward the negatively charged plate.

In the Millikan oil droplet experiment, the negatively charged oil droplets are subjected to an electric field created by the charged plates. The electric force (Fe) acts on the oil droplet in a direction opposite to the gravitational force (Fg). When Fe is greater than Fg, the electric force overcomes the gravitational force, causing the negatively charged oil droplet to experience an upward force. As a result, the oil droplet moves freely upward toward the negatively charged plate.

Option B is incorrect because if Fe is equal to Fg, the forces balance each other, resulting in a stationary droplet. However, the question states that Fe is increased until it is greater than Fg, implying that the droplet is no longer stationary but moves in response to the electric force.

Therefore, option C is the correct answer, as it describes the effect of an electric field on the motion of a negatively charged oil droplet in the Millikan oil droplet experiment.

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If more \(H_{2}\) and \(N_{2}\) are added to the reaction 3\(H_{2}\) + N2 → 2\(NH_{3}\) after it reaches equilibrium, two events will occur Shift in Equilibrium and Increased Yield of \(NH_{3}\)

1. Shift in Equilibrium: According to Le Chatelier's principle, when additional reactants are added, the equilibrium will shift in the forward direction to consume the added reactants and establish a new equilibrium. In this case, more \(NH_{3}\) will be produced to counteract the increase in \(H_{2}\) and \(N_{2}\).

2. Increased Yield of \(NH_{3}\): The shift in equilibrium towards the forward reaction will result in an increased yield of \(NH_{3}\). As more \(H_{2}\) and \(N_{2}\) are added, the reaction will favor the production of \(NH_{3}\) to maintain equilibrium. This will lead to an increase in the concentration of \(NH_{3}\) compared to the initial equilibrium state.

It is important to note that the equilibrium position will ultimately depend on factors such as the concentrations of \(H_{2}\), \(N_{2}\), and \(NH_{3}\), as well as the temperature and pressure of the system. By adding more reactants, the equilibrium will adjust to achieve a new balance, favoring the formation of more \(NH_{3}\).

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Sodium metal is  the excess reagent and after the completion of  the reaction 16.8g of it is left.

In a chemical reaction, the reactant which is present in excess and don't get fully used up in the reaction is called excess reagent.

            no. of moles (n)/stoichiometry coefficient.

       The reactant with greater value will be the excess reagent.

                  \(2Na+Cl_2\) ⇒  \(2NaCl\)

         where given mass of Na is 20g    molecular weight=23g

                     given mass of \(Cl_{2}\) is 10g    molecular weight=71g

        n=given mass/ molar mass                         n=given mass/ molar mass  

        =20/23                                                            =10/71

         S.C=2                                                              S.C.=1

        so n/S.C value is 0.43                                   so n/S.C value is 0.14

Since value is high, Na is                                   Since value is lower, \(Cl_{2}\)      excessive reagent.                                             is limiting reagent.      

          according to the equation, 71g of \(Cl_{2}\)  react with 23g of Na

                                                         1g ≡ 23/71

                                                       10g ≡ 23/71 *10

                                                              =3.2g of Na

         the amount of Na left is 20-3.2 =16.8g

Hence Na is the excess reagent with 16.8g of it remains.

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Answer:

D

Explanation:

Bc I got it right

Answer:

For A: the contact I think would be the bookshelf holding it up the non-contact force would be gravity making it so the book would stay where it was put.

For B: the contact force would be the ball being kicked and the non-contact would be the gravity pulling it back to the ground.

For C: A hiker in the woods reading her compass to determine which direction to go The contact would be her holding the compass and moving around the non-contact would be the compass arrow turning every time she moves.

For D: The child on a sled for the contact force would be the person pushing the little kid down the hill the non-contact force would be the gravity that would be keeping the kid going down the hill and gravity stopping the kid at the bottom of the hill.

Explanation:

Have the same assignment and these are the answers I gave. Hope this helps someone!

Answer:

If you have a periodic table of the elements, you should be able to do this easily. The best periodic table, in my opinion, is the interactive periodic table at ptable(.com).

I will attach a formula sheet with everything you might need to know in chemistry.

Explanation:

You should be able to do this, but if you need more help let me know! :)

Answer:

Permeability.

Explanation:

The ability of a rock or soil to allow water to flow through it is call permeability. Materials such as gravel that allow the flow of water are permeable. Materials such as clay or granite that do not allow the flow of water are impermeable.

Answer:C - 3.115 g

Explanation:Correct

Answer:

C) 10.2

Explanation:

Formula: Actual-Expected/Expected

The actual was 55.2 while the expected was 50.1

55.2-50.1/50.1=0.101796407 * 100= 10.2%

The percentage error in the student's determination is 10.2%

The correct answer to the question is Option C. 10.2

From the question given above, the following data were obtained:

Measured value = 55.2 °C

Accepted value = 50.1 °C

Next, we shall determine the absolute error. This can be obtained as follow:

Measured value = 55.2 °C

Accepted value = 50.1 °C

Absolute error = |Measured – Accepted|

Absolute error = |55.2 – 50.1|

Finally, we shall determine the percentage error.

Absolute error = 5.1 °C

Accepted value = 50.1 °C

\(Percentage error = \frac{Absolute error }{Accepted value} * 100\\\\= \frac{5.1}{50.1} * 100\\\\\)

Therefore, the percentage error in the student's determination is 10.2%.

The correct answer to the question is Option C. 10.2

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Answer: Please find answer in explanation column

Explanation:

Numbering the steps in the correct order to show how ice changes into gas, we have that

1.Ice molecules vibrate in a fixed place.

2. Ice is heated and the molecules speed up

3. The molecules gain enough kinetic energy to leave their solid form.

4.The water becomes liquid and gets hotter.

5. The molecules leave their liquid form and enter the air as a gas.

Ice is the solid form of water  which cannot freely move around in this form  so  it vibrates  about its fixed position.When heated,its molecules acquire energy and its vibration  speeds up  causing it to overcome its  binding forces (that makes it vibrate about a fixed position) and becomes mobile as it leaves its solid form to acquire a liquid state.    With continuous heating, the liquid gets hotter making the molecules vibrate more rapidly, spread out and move freely at high speeds to form Water vapour - The gaseous state of water.

Answer:

CF₄ has the most polar bonds among the molecules and SCl₂ and BrCl have dipole moments.

Explanation:

(a)To determine which molecule has the most polar bonds, we need to consider the electronegativity difference between the atoms in each molecule. The greater the electronegativity difference, the more polar the bond. Here are the electronegativity values for the elements involved:

Sulfur (S): 2.58

Fluorine (F): 3.98

Carbon (C): 2.55

Bromine (Br): 2.96

Chlorine (Cl): 3.16

Comparing the electronegativity differences:

SCl₂: The electronegativity difference between sulfur (2.58) and chlorine (3.16) is 0.58.

F₂: The electronegativity difference between fluorine (3.98) and fluorine (3.98) is 0.

CS₂: The electronegativity difference between carbon (2.55) and sulfur (2.58) is 0.03.

CF₄: The electronegativity difference between carbon (2.55) and fluorine (3.98) is 1.43.

BrCl: The electronegativity difference between bromine (2.96) and chlorine (3.16) is 0.2.

From the calculations, we can see that CF₄ has the highest electronegativity difference (1.43) and, therefore, the most polar bonds.

(b) To determine which of the molecules have dipole moments, we need to consider the molecular geometry and the polarity of the bonds.

SCl₂: Sulfur dichloride (SCl₂) has a bent molecular geometry. The S-Cl bonds are polar, and due to the bent shape, the dipole moments do not cancel out, resulting in a net dipole moment.

F₂: Fluorine (F₂) is a diatomic molecule with a linear shape. The bond is nonpolar because the electronegativity of fluorine is the same, and the dipole moments cancel each other out.

CS₂: Carbon disulfide (CS₂) has a linear molecular geometry. Although the C-S bonds are polar, the molecule is symmetrical, and the dipole moments cancel out, resulting in a nonpolar molecule.

CF₄: Carbon tetrafluoride (CF₄) has a tetrahedral molecular geometry. The C-F bonds are polar, but the molecule is symmetrical, and the dipole moments cancel out, resulting in a nonpolar molecule.

BrCl: Bromine chloride (BrCl) has a linear molecular geometry. The Br-Cl bond is polar, and the molecule does not possess symmetry to cancel the dipole moments. Hence, it has a net dipole moment.

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Answer:

it is an endothermic reaction

Explanation:

This is because there is a rise in temperature from 20 to 46. this means that the reaction takes in heat from the suuroundings

When performing an extraction between an aqueous solution and an organic solution or organic compound, density will determine the layer ending up at the bottom of the separation funnel.

In chemistry, a separatory funnel is a kind of funnel that separates two immiscible liquids.

It is a transparent funnel and when two immiscible liquids i.e aqueous and organic solution is poured into it, and then allowed to stand, after a while a distinguished layer is formed setting them apart from each other.

Due to the difference in density, the extraction becomes easier as the aqueous layer has a low density and stays at the top while the organic layer is at the bottom.

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The balanced equation is given as :

2CH₃OH  +  3O₂  ---->   2CO₂   +  4H₂O , The coefficient of methanol is 2.

The reaction of the methanol that is  CH₃OH , when it is burned in the presence of the air  is given below :

CH₃OH  +  O₂  ---->   CO₂   +  H₂O

To balanced equation , the number of the atoms in the reactant side is equals to the product side.

    Reactant       Product

C          1                  1

H          4                  2

O          3                 3

to balanced the equation , multiply the , 2 in  CH₃OH , 3 in O₂ and the 2 in CO₂  and the 4 in  H₂O. we get :

2CH₃OH  +  3O₂  ---->   2CO₂   +  4H₂O

The above equation is now balanced. The coefficient if methanol is 2.

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Answer:

Welcome to the project on communicating design details for the properties and uses of unsaturated hydrocarbons. This project aims to enhance your understanding of the characteristics and applications of unsaturated hydrocarbons.

Here are the steps to complete this project:

Step 1: Research

Research the different types of unsaturated hydrocarbons, including alkenes and alkynes. Find out their general properties, such as their reactivity, flammability, and solubility. Also, identify their uses in various industries, such as plastics, rubber, and fuel.

Step 2: Create a Design

Using your research findings, create a design to visually communicate the properties and uses of unsaturated hydrocarbons. You can use tools like Canva, PowerPoint, or other design software to create infographics, posters, or slideshows.

Step 3: Incorporate Key Information

Incorporate the key information you gathered in step 1 into your design. Make sure to include the following details:

Definitions of unsaturated hydrocarbons, alkenes, and alkynes

Properties of unsaturated hydrocarbons, including reactivity, flammability, and solubility

Applications of unsaturated hydrocarbons in various industries, such as plastics, rubber, and fuel

Examples of unsaturated hydrocarbons, such as ethene and propene for alkenes, and ethyne for alkynes

Step 4: Review and Refine

Review your design and refine it to make sure it effectively communicates the properties and uses of unsaturated hydrocarbons. Check for spelling and grammar errors, and ensure that the information is accurate and easy to understand.

Step 5: Present Your Design

Present your design to your class or teacher, and explain the properties and uses of unsaturated hydrocarbons. You can also invite feedback and questions to enhance your understanding of the topic.

In conclusion, the properties and uses of unsaturated hydrocarbons are essential for many industries. Through this project, you will gain a better understanding of unsaturated hydrocarbons and develop your communication skills to effectively present your findings. Good luck!

Explanation:

Answer:

Explanation:

The three types of unsaturated hydrocarbons is alkynes, alkenes, and aromatic hydrocarbons. Which is composed of alkynes? acetylene. brainlist

No precipitate forms because Q < Ksp. Therefore, option (D) is correct.

To determine what happens when calcium and sulfate solutions are mixed, we need to compare the reaction quotient (Q) with the solubility product constant (Ksp) for calcium sulfate (CaSO₄).

The balanced equation for the dissolution of calcium sulfate is:

CaSO₄(s) ⇌ Ca²⁺(aq) + SO₄²⁻(aq)

The expression for Q is given by:

Q = [Ca²⁺][SO₄²⁻]

Given that the concentrations of Ca²⁺ and SO₄²⁻ are 2.00×10⁻³ M and 3.00×10⁻² M, respectively, we can substitute these values into the Q expression:

Q = (2.00×10⁻³)(3.00×10⁻²)

= 6.00×10⁻⁵

Comparing Q with the Ksp value of calcium sulfate (7.10×10⁻⁵), we find that Q is smaller than Ksp (Q < Ksp).

In this case, when Q is smaller than Ksp, it indicates that the ionic product of the concentrations of Ca²⁺ and SO₄²⁻ is less than the solubility product. Therefore, no precipitate will form because the solution is not yet saturated with respect to calcium sulfate.

Thus, the correct option is (D).

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Answer:

wavelengths

Explanation:

hope it helps

thanks

Wavelengths are being recorded by the machine by using IR spectrography. Therefore, option B is correct.

Infrared (IR) spectroscopy is also known as infrared spectrometry. It is a technique that is used to analyze and identify chemical compounds based on their absorption or emission of infrared radiation.

Infrared radiation lies in the electromagnetic spectrum between visible light and microwave radiation. It has longer wavelengths and lower frequencies than visible light. When infrared radiation passes through a sample, certain chemical bonds in the sample absorb specific frequencies of infrared light.

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Answer:

a) 2

b) 3

c) 5

d) 6

Explanation:

According to the electron sea model, the melting points of metals are not as extreme as the boiling points. Therefore, the given statement is correct is true.

The Electron Sea Model's whole hypothesis relies around the behavior of atoms throughout this bonding. The movement of unpaired electrons between positively charged metal ions in a mesh is known as metallic bonding.

According to the electron sea model, the melting points of metals are not as extreme as the boiling points. This is because the cations and electrons are - in a metal. It does not take much energy for a solid to become liquid. But metallic bonds are very - , so it does require a lot of energy to separate atoms from the cations in their sea of electrons. This statement is true.

Therefore, the given statement is correct is true.

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The moles would be 12 moles, 4 moles and 11.34 moles

When hydrogen gas (H2) reacts with oxygen gas (O2) to produce water (H2O), the balanced chemical equation is:

2H2 + O2 -> 2H2O

So,

For every 6 moles of H2, 12 moles of H2O will be produced

For every 2 moles of H2, 4 moles of H2O will be produced

For every 5.67 moles of H2, 11.34 moles of H2O will be produced.

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β oxidation of fatty acids takes place in the mitochondria, which are organelles found in eukaryotic cells responsible for energy production. The process involves breaking down fatty acids into acetyl-CoA molecules, which can then be used by the cell to produce ATP through the process of cellular respiration.

The β oxidation pathway is important for providing energy to cells, especially during times of low glucose availability. Other organelles, such as the chloroplasts and the Golgi apparatus, have different functions and are not involved in this process. The cytosol, or the fluid portion of the cytoplasm, is the site of many metabolic processes but does not play a direct role in β oxidation. The nucleus is responsible for storing and protecting genetic material and is not involved in energy production.
The β-oxidation of fatty acids takes place in the mitochondria, an organelle within the cell. This process involves breaking down fatty acids into smaller molecules called acetyl-CoA, which are then used to generate energy through the citric acid cycle and oxidative phosphorylation. Mitochondria are often referred to as the "powerhouses" of the cell due to their role in energy production.

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2C4H10 + 13O2 Right arrow. 8CO2 + 10H2O

What is the mole ratio of butane to carbon dioxide?

ANSWER:

Butane is an organic compound with the formula C4H10 and carbon dioxide is compound (gas) with the formula CO2. So, the balanced coefficient of butane is 2, and that of carbon dioxide is 8. According to thid, the mole ratio of butane to carbon dioxide is 2:8 or 1:4.

Answer:

answer is 2:8 or 1:4

Explanation:

Answer:

Lithium has 3 protons, 4 neutrons, 3 electrons, and its mass is 6.941 u

Answer:

"powerhouse"- mitochondria

"stores spare parts"-  vacuole

"surrounds the nucleus"- nuclear membrane

"controls the cell"- nucleus

"pathways"- endoplasmic reticulum

"inner layer"- cell membrane

"outer plant covering"- cell wall

"fills up the cell"- ctyoplasm

"collects light"- chloroplasts

"packages proteins"- golgi

"holds info"-chromosomes

"makes protein"-ribosomes

please mark me brainliest if you like my answer <3

Answer:

kinetic energy

Explanation:

all moving objects have kinetic energy. when an object is an motion it changes its position by moving in a direction: up,down, forward, or backward

Answer: its C kinetic energy

Explanation: i did the test

Answer:

See below

Explanation:

How many atoms are in grossular/Ca2AL2(SiO4)3

_2___ calcium atoms amount

__2__ Aluminum atoms amount

__3__ silicon atoms amount

__12__ Oxygen atoms amount

See attached worksheet

The pH of the solution will be 10.47.

The pH of a solution is mathematically given as:

 pH = - log [\(H^+\)] of -log [\(H_3O^+\)]

Thus, in this case, with  [\(H_3O^+\)]  of 3.4 x 10-¹¹ M:

pH = -log 3.4 x \(10^-^1^1\) = 10.47

Thus, the pH of the solution will be 10.47.

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Answer:

Fractional distillation (often shortened in high school to just distillation)

Explanation:

Some elements have different boiling points and can be separated by boiling one element out and condensing it. This is how sodium acetate is made, for example.

Hope this helped!