2. If 1.2 mol of tin metal and excess gold (III) chloride are used, how many moles of gold metal form? a. 0.67 mol
b. 0.80 mol
c. 1.2 mol
d. 2.0 mol
e. 2.4 mol
Answers
The number of moles for Gold metal when 1.2 mol of tin metal and excess gold (III) chloride are used is 0.8 mol, option B.
In chemistry, a mole, usually spelt mol, is a common scientific measurement unit for significant amounts of extremely small objects like atoms, molecules, or other predetermined particles.
The mole signifies 6.02214076 1023 units, which is a very big quantity. For the International System of Units (SI), the mole is defined as this quantity as of May 20, 2019, according the General Conference on Weights and Measures. The number of atoms discovered via experimentation to be present in 12 grammes of carbon-12 was originally used to define the mole.
In commemoration of the Italian physicist Amedeo Avogadro (1776–1856), the quantity of units in a mole is also known as Avogadro's number or Avogadro's constant. According to Avogadro, equivalent quantities of gases under same circumstances contain an identical number of molecules.
We have equation as,
2AuCl3 + 3Sn → 3SnCl2 + 2Au
If 3 moles of Tin metal gives us 2 moles of the Gold metal then,
1.2 moles of tin will give = 1.2 x 2 / 3 = 0.8 mol.
Therefore, number of mole for gold will be 0.8 mol.
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The number of moles for Gold metal when 1.2 mol of tin metal and excess gold (III) chloride are used is 0.8 mol, option B.
In chemistry, a mole, usually spelt mol, is a common scientific measurement unit for significant amounts of extremely small objects like atoms, molecules, or other predetermined particles.
The mole signifies 6.02214076 1023 units, which is a very big quantity. For the International System of Units (SI), the mole is defined as this quantity as of May 20, 2019, according the General Conference on Weights and Measures. The number of atoms discovered via experimentation to be present in 12 grammes of carbon-12 was originally used to define the mole.
In commemoration of the Italian physicist Amedeo Avogadro (1776–1856), the quantity of units in a mole is also known as Avogadro's number or Avogadro's constant. According to Avogadro, equivalent quantities of gases under same circumstances contain an identical number of molecules.
We have equation as,
2AuCl3 + 3Sn → 3SnCl2 + 2Au
If 3 moles of Tin metal gives us 2 moles of the Gold metal then,
1.2 moles of tin will give = 1.2 x 2 / 3 = 0.8 mol.
Therefore, number of mole for gold will be 0.8 mol.
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Related Questions
How Many Grams Of Water Are Produced By Reacting 15.8 g H2, With Excess Oxygen? 2H2 + O2 --> 2H20
A. 141 G
B. 15.8 G
C. 17.8 G
D. 282 G
Answers
By using stoichiometry and considering the molar ratios from the balanced chemical equation, we find that reacting 15.8 g of H2 with excess oxygen will produce 141 g of water. 141 g.option A.
In the balanced chemical equation 2H2 + O2 → 2H2O, it is stated that two moles of hydrogen gas (H2) react with one mole of oxygen gas (O2) to produce two moles of water (H2O). Since the molar mass of water is approximately 18 g/mol, we can calculate the amount of water produced by converting the mass of hydrogen gas to moles and then using the mole ratio from the balanced equation.
To find the moles of hydrogen gas, we divide the given mass (15.8 g) by the molar mass of hydrogen (2 g/mol), which gives us 7.9 moles of H2. According to the balanced equation, each mole of H2 produces two moles of H2O. Therefore, 7.9 moles of H2 will produce 2 * 7.9 = 15.8 moles of H2O.
Finally, we convert the moles of water to grams by multiplying the moles (15.8) by the molar mass of water (18 g/mol), which gives us 284.4 g. However, we need to remember that the given reaction has excess oxygen, meaning all the hydrogen will react. Therefore, the limiting reactant is not hydrogen but oxygen.
Consequently, the amount of water produced will be based on the number of moles of oxygen. Since there is excess oxygen, we can assume that the moles of oxygen consumed are equal to the moles of hydrogen reacted. Therefore, the correct answer is 15.8 moles * 18 g/mol = 141 g.option A.
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Which of these properties is most helpful when identifying a substance in a
given sample of matter?
A. State
B. Mass
C. Melting point
D. Volume
Answers
Answer:
Melting point
Explanation:
Melting point is a intensive property and Intensive properties can be used to help identify a sample because these characteristics do not depend on the amount of sample, nor do they change according to conditions.
IF IT WAS HELPFUL HIT THE CROWN
Answer:
Explanation:
Yes melting point!
Which are the factors that favor SN2 reactions, as described in the lab lecture?
a) Strong nucleophile, good leaving group, polar protic solver, methyl or primary halide
b) Strong nucleophile, good leaving group, polar aprotic solvent, methyl or primary halide. c) Weak nucleophile, good leaving group, polar aprotic solvent, methyl or primary halide d) Strong nucleophile, poor leaving group, polar aprotic solvent, , tertiary halide.
e) Strong nucleophile, good leaving group, polar aprotic solvent, tertiary halide.
Answers
Strong nucleophile, good leaving group, polar aprotic solvent, methyl or primary halide. The correct answer is option: b.
In an SN2 reaction, a nucleophile attacks the carbon atom to which the leaving group is attached, while the leaving group departs from the molecule. The reaction proceeds in a single step, with the nucleophile and leaving group involved in the transition state. A strong nucleophile is required to attack the carbon atom, and a good leaving group is necessary to depart from the molecule. Methyl or primary halides are preferred substrates because they are less hindered, making the attack by the nucleophile easier. Option b is correct.
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Aldehydes and ketones undergo acid-catalyzed reaction with alcohols to yield hemiacetals, compounds that have one alcohol-like oxygen and one ether-like oxygen bonded to the same carbon. Show the structure of the hemiacetal that you would obtain by reaction of benzaldehyde with ethanol. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • Do not include lone pairs in your answer. They will not be considered in the grading.
Answers
The reaction between benzaldehyde and ethanol under acid catalysis is described by the following equation:
Benzaldehyde reacts with ethanol in the presence of an acid catalyst to produce hemiacetal, which has one oxygen-like alcohol and one ether-like oxygen bonded to the same carbon atom.
Catalysis is a crucial step in many chemical processes. Several businesses utilize this method to transform raw resources into finished goods. There are several industrial procedures that rely on catalysis. Chemical labs rely heavily on acids and bases as reagents.
It acts as a catalyst in a number of different chemical processes. When an acid or a base is added to a chemical process, the reaction proceeds more quickly without using up the acid or the base.
Catalytic reactions include the addition of hydrogen cyanide to aldehydes and ketones in the presence of sodium hydroxide and the breakdown of sucrose into glucose and fructose in sulfuric acid.
Many chemical processes may be catalyzed by acids and bases.
The hemiacetal that you would get from the reaction of benzaldehyde with ethanol is as follows:
When a hemiacetal is produced from an aldehyde or ketone and an alcohol, it reacts with another molecule of alcohol to form an acetal.
Acid-catalyzed reactions are used to transform aldehydes and ketones into hemiacetals, compounds that have one alcohol-like oxygen and one ether-like oxygen bonded to the same carbon, according to the reaction.
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Convert 714 years to min using Dimensional Analysis
Answers
Answer:
We know (by definition) that: 1 yr ≈ 525948.77 min.
We can set up a proportion to solve for the number of minutes.
1 yr / 714 yr ≈ 525948.77 min / x min
Now, we cross multiply to solve for our unknown x:
x min ≈ (714 yr / 1 yr) * 525948.77 min → x min ≈ 375527421.78000003 min
Conclusion:
714 yr ≈ 375527421.78000003 min
Explanation:
Hope it is helpful....
\(714 \: y \times \frac{12 \: months}{1 \: years} \times \frac{30.417 \: days}{1 \: month}\)
\( = 260612.856 \: days\)
\(260612.856 \: days \times \frac{24 \: h}{1 \: day} \times \frac{60 \: min}{1 \: h}\)
\( = 375282512.6 \: minutes\)
Is the atom indicated with an arrow nucleophilic, electrophilic, acidic, more than one of these choices, or none of these choices?
Select all that apply.
a) nucleophilic
b) electrophilic
c) acidic
d) none of the above
Answers
The correct answer to this question is Option a- nucleophilic, Option B - electrophilic, Option c- acidic, and more than one of these choices.
When an atom indicates with an arrow, it can either be nucleophilic, electrophilic, acidic, or more than one of these choices. To understand this concept, you need to understand what each term means.
1. Nucleophile: A nucleophile is a chemical species that donates a pair of electrons to form a new bond with an electrophile. In other words, it seeks positively charged species to react with.
2. Electrophile: An electrophile is a chemical species that seeks electrons to form a new bond. In other words, it seeks negatively charged species to react with.
3. Acid: An acid is a chemical species that can donate a proton (H+) in a chemical reaction.
4. More than one choice: In some cases, the atom indicated with an arrow can be more than one of the above choices. For instance, if an atom can donate a pair of electrons and donate a proton, it can be both nucleophilic and acidic at the same time.
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4. What is free energy?
Answers
Answer:
A thermodynamic quantity equivalent to the capacity of a system to do work.
Explanation:
Of the following, a 0.2 M aqueous solution of __________ will have the highest freezing point.
A) Na₃PO₄
B) Mg(NO₃)₂
C) NaCl
D) (NH₄)₃PO₄
E) Pb(NO₃)₂
Answers
Of the following, a 0.2 M aqueous solution of C) NaCl will have the highest freezing point.
The freezing point of a solution depends on the number of dissolved particles, which is related to the concept of colligative properties. The greater the number of particles, the lower the freezing point will be.
In this case, we need to find the solution with the least number of particles to have the highest freezing point. When the given compounds dissolve in water, they dissociate into ions. Na₃PO₄ dissociates into 4 ions (3 Na⁺ and 1 PO₄³⁻), Mg(NO₃)₂ into 3 ions (1 Mg²⁺ and 2 NO₃⁻), NaCl into 2 ions (1 Na⁺ and 1 Cl⁻), (NH₄)₃PO₄ into 4 ions (3 NH₄⁺ and 1 PO₄³⁻), and Pb(NO₃)₂ into 3 ions (1 Pb²⁺ and 2 NO₃⁻).
As NaCl produces the least number of ions (only 2) when dissolved in water, its 0.2 M aqueous solution will have the highest freezing point compared to the other solutions. Hence. the correct answer is option C) NaCl.
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4. What trend in atomic radius occurs down a group on the periodic table?
rind on the periodic table?
Answers
Answer:Atomic radius gets bigger
Explanation:
Atomic radius bigger because not only do the atoms have more and more protons and neutrons, and thus more mass in general, there is also stronger shielding affect. Shielding affect is when electrons closer to the nucleus block the positive charge from reaching electrons farther from the nucleus, and thus those far electrons are not drawn towards the nucleus as strongly, and spread out more, increasing atomic radius.
how many moles of water will be produced when 38 moles of sulfuric acid is consumed
Answers
Answer:
Explanation:
The conversion of sulphur to sulfuric acid, though it goes through several steps, is:
2 S + 3 O2 + 2 H2O → 2 H2SO4
OK, so the equation says for every 2 moles of S you will get two moles of sulfuric acid. With a little simple math, then, the ratio of S to H2SO4 is 2:2 which is the same as 1:1.
While not correct by convention, you can write the above equation as
S + 3/2 O2 + H2O → H2SO4
And then the relationship between S and H2SO4 is more clear.
Weathering and erosion affect the most in the formation of igneous rock. A. True B. False
Answers
Answer:
true
Explanation:
In the following equation for a chemical reaction, the notation as a orgy, indicate whether the substance indicated is in the solid liquid or gas state
Identify each of the following as a product or reactant it is in the picture
And the last two questions are also in the picture
Answers
The reaction is endothermic and absorbed N2 and O2 are reactants while NO is a product
What is an endothermic reaction?An endothermic reaction is a chemical reaction that absorbs heat from the surroundings, resulting in an increase in the system's internal energy.
In other words, the energy of the products is greater than the energy of the reactants, and the reaction requires an input of heat to proceed. Endothermic reactions are characterized by a decrease in temperature of the surroundings.
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Round off the following numbers to three significant figures.
40.009????????
Answers
Answer:
40.0
40.009 contains 5 significant figures and 3 decimals. 40.009 rounded to 4 sig figs is 40.01, to 3 sig figs is 40.0, and to 2 sig figs is 40.. To count the number of sig figs in 40.009, count all 5 digits since it has no insignificant digits (all digits are significant).
What layer of the skin contains blood vessels, nerves and hair follicles?
Dermis
Epidermis
Hypodermis
Subcutaneous
Answers
Answer:
The answer to your question is Dermis
Explanation:
Below the epidermis is the dermis. This is where our blood vessels, nerve endings, sweat glands, and hair follicles are.
a process with a large negative ∆g will always proceed rapidly.
T/F
Answers
False. A process with a large negative ∆G does not necessarily mean it will always proceed rapidly. The magnitude of ∆G provides information about the spontaneity of a reaction, but it does not directly indicate the speed or rate of the process.
The rate of a chemical reaction is determined by factors such as the activation energy, temperature, concentration, and presence of catalysts. Even if a reaction has a large negative ∆G, indicating high spontaneity, it may still have a slow rate if the activation energy is high or other factors are limiting.
While a large negative ∆G suggests that the reaction is thermodynamically favorable and will proceed in the forward direction, the rate of the reaction is determined by kinetic factors. Reactions with large negative ∆G values can still be slow if the activation energy is high, requiring sufficient energy input for the reaction to occur. Conversely, reactions with small or even positive ∆G values can proceed rapidly if the activation energy is low and other favorable conditions are met. Therefore, the speed of a reaction is not solely determined by the magnitude of ∆G.
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False,The statement is not entirely accurate. The change in Gibbs free energy (∆G) is a measure of the spontaneity of a process, indicating whether a reaction will proceed in a forward direction.
What is activation energy?
Activation energy can be defined as the threshold energy that must be surpassed for a chemical reaction to take place.. It is the energy barrier that separates the reactants from the products in a chemical reaction.
The statement is false. The sign of the Gibbs free energy change (∆G) alone does not determine the rate or speed of a process. The Gibbs free energy change (∆G) provides information about the spontaneity or direction of a reaction, but it does not directly indicate the rate at which the reaction will occur.
The rate of a reaction is determined by factors such as the activation energy, the presence of catalysts, temperature, concentration, and the reaction mechanism. These factors influence the reaction kinetics, which is the study of the speed and pathway of a reaction.
In some cases, a process with a large negative ∆G can proceed rapidly, especially if the other factors favor a fast reaction. However, it is also possible for a process with a large negative ∆G to occur slowly if the activation energy is high or other factors are not favorable for rapid reaction kinetics.
Therefore, the statement that a process with a large negative ∆G will always proceed rapidly is false.
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A Virginia class nuclear submarine has an internal volume of 7.9 million
liters at a pressure of 1.0 atm. If a crewman were to open one of the
hatches to the outside ocean while it was underwater (pressure = 25 atm),
what be would the new volume of the air inside the submarine?
Answers
Answer:
1500
Explanation:
I believe this is correct but am not sure, I shall update when I submit my quiz...
Definition of a metallic bond. a. The attraction of a metallic cation for delocalized electrons b. The opposition of cations becoming energized electrons c. A mixture of elements becoming one d. Two metals colliding becoming one
Answers
A metallic bond refers to the electrostatic attraction between positively charged metal ions and delocalized electrons in a metal. Option A is correct.
In a metallic bond, the valence electrons of the metal atoms become delocalized and are free to move throughout the metal lattice. The metal cations are held together by the surrounding sea of delocalized electrons.
This results in a strong bond between the metal atoms that gives rise to the characteristic properties of metals, such as high electrical conductivity, high thermal conductivity, and malleability. The metallic bond is a type of chemical bond that is found only in metals and their alloys.
Hence, A. The attraction of a metallic cation for delocalized electrons is the correct option.
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A 295 g sample of unknown metal is at an initial temperature of 13.00 °C absorbs 75.0 kJ.
The final temperature of the system is 295 °C.
What is the specific heat?
What is the metal?
Answers
The system's final temperature is 295 °C, or 71.33 °F. To calculate the metal's heat capacity, use Q = smT. (Be remember to factor in the metal's mass, its mass in heat, and its change in temperature.
What is the specific heat formula?The following equation can be used to determine specific heat, abbreviated Cp: Cp=QmΔT When m is the material's mass, Q is the quantity of heat energy delivered to the substance, & T is the temperature change of the substance, we can write C p = Q m T.
How can specific heat be measured in an experiment?Any type of calorimeter must be used in the laboratory to measure specific heat. A calorimeter is an insulated container with the ability to track changes in energy. To minimise energy gain or loss to or from the environment, the calorimeter is insulated.
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What is the total number of electrons in the sixth energy level (n = 6).?
Answers
The total number of electrons in an energy level (n) can be determined using the formula:
Total number of electrons = 2n²
An electron is a subatomic particle that carries a negative electric charge. It is one of the fundamental particles that make up atoms. Electrons are located outside the atomic nucleus in specific energy levels or orbitals. They are incredibly small and have a mass of approximately 9.11 x 10^-31 kilograms.
For the sixth energy level (n = 6), we can substitute the value into the formula:
Total number of electrons = 2(6)²
= 2(36)
= 72
Therefore, the total number of electrons in the sixth energy level is 72.
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The plant on the left is growing more because it has been receiving more water
Answers
Answer:
uhhh well ig btw what plant
Explanation:
it would be more sunlight to
Predicting Reaction Products
Balance the equations and predict the products for the following reactions:
Please help, my teacher never taught us this and it’s due today!
Will mark brainiest and give a lot of points!
Answers
The result of a chemical reaction or a process stage is a product (reaction product). a component of the reaction or mechanism stage that is not a substrate, reactant, reagent, beginning substance, or starting combination.
What is meant by reaction product?The organisms that result from chemical interactions are called products. Reactants undergo a high energy transition stage during a chemical process before becoming products. The reactants are consumed as a result of this process. It can occur spontaneously or be facilitated by catalysts, which reduce the energy of the transition state, and solvents, which provide the favorable molecular conditions for the reaction to occur.
Even in the case of reversible reactions, it is customary to draw products on the right side of chemical equations. Several characteristics of a chemical reaction, such as whether the reaction is exergonic or endergonic, are determined by the properties of products, such as their energies.
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which of the following should be classified as a mixture?
Helium
Water
Iron
Air
Answers
Answer:
I'm pretty sure it's A)Helium
Explanation:
Answer:
AIR
Explanation:
what are the steps that a solid must go through to become a gas
Answers
Answer:
solid, liquid and then gas where it melts and then evaporates or directly by sublimation
what is the correct name for Ga(NO2)3?
Answers
Gallium Nitrite your welcome
A binary III/V direct bandgap semiconductor called gallium nitride is ideally suited for high-power transistors that can function at high temperatures. It has been widely utilized in light-emitting diodes (LED) since the 1990s. Its chemical formula is Ga(NO₂)₃.
Blu-ray discs are read using a blue light that gallium nitride emits. Gallium nitride is also utilized in lasers, photonics, RF components, and semiconductor power devices. GaN will be used in sensor technology in the future.
Gallium nitride power amplifiers are perfect for microwave and terahertz (ThZ) devices, such as imaging and sensing, the aforementioned future market, due to their capacity to operate at significantly higher temperatures and voltages than gallium arsenide (GaAs) transistors.
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Why is it important to exposing sodium borohydride to moisture?
Answer choices
space 1. Sodium borohydride is a mild reductant, but water can amplify its reactivity and make it too strong of a reductant.
space 2. Sodium borohydride ignites when it comes into contact with water.
space 3. Sodium borohydride is hygroscopic and when it reacts with water it loses a hydride and no longer can be used as a hydride source.
space 4. Sodium borohydride polymerizes in the presence of water to form an amorphous gooey solid that is difficult to handle.
Answers
space 3. Sodium borohydride is hygroscopic and when it reacts with water it loses a hydride and no longer can be used as a hydride source. So, it is important to exposing sodium borohydride to moisture.
Sodium borohydride, also known as sodium tetrahydridoborate or NaBH4, is a chemical compound often used as a moisture reducing agent in organic chemistry. It is a white, crystalline powder that is highly reactive and flammable. It is important to keep sodium borohydride away from moisture as it is hygroscopic, meaning it absorbs moisture from the air. When sodium borohydride comes into contact with water, it loses a hydride ion and is no longer able to function as a hydride source in chemical reactions. This reduces the effectiveness of the reagent and can lead to unsuccessful reactions or the formation of byproducts.
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Someone please help me ASAP!
Answers
Answer:
Increasing the temperature of the reactants
Explanation:
This causes more vibrations to occur, hence increasing the kinetic energy of the particles. The number of particles with activation energy would increase as well because they have higher kinetic energy. Kinetic energy is also the reason why the collision between particles increases. And the frequency of effective collisions increases because of the kinetic energy as well, keep in mind the particles must also be orientated in the correct way as well.
Which of the following are examples of matter? Check all that apply.
A. air
B. light
C. water
D. sound
E. bacteria
F. copper
Answers
Answer:
Air, Water, Bacteria, and Copper
Explanation:
air, water, bacteria, copper
Heat cannot be considered as an example of matter because heat is regarded as one of the energies that it's movement is as a result of temperatureSound cannot be considered as matter as well as light. Light can be considered as a propagation that occur through pressure wave and this is through a medium of particles, and sound is a wave, it is not considered a form of matter. Light and sound doesn't have mass as well as weight and Volume and both Light and sound doesn't occupies space and they are considered as not having area.Matter can be regarded as anything which is able to occupies space and that has mass
All physical objects can be considered as been composed of matter, The classical states of matter can be classified as: are solid or liquid or gasTherefore, the examples of matter matter among the given options are: air water, bacteria, copperLearn more at;
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Which of the following compounds contains both ionic and covalent bonds?
A.NaCl
B.CO
C.KI
D.NaOH
Answers
Answer:
D.NaOH
Explanation:
The compound that contains both ionic and covalent bonds from the given choices is NaOH, sodium hydroxide.
An ionic bond is formed between a metal and non-metal. In this compound, the metal is the Na and non - metal is the OH. To form this bond type, an atom transfers its electrons to the non-metal to attain stability.
The radical group OH⁻ which acts as a single unit is made up of a covalent bond. It involves the sharing of electrons between two non-metals whose electronegativity difference is very similar to one another.
in a titration, 5.0 ml of a 2.0 m naoh(aq) solution exactly neutralizes 10.0 ml of an hcl(aq) solution. what is the concentration of the hcl(aq) solution?
Answers
When in a particular titration, 5.0 ml of a 2.0 m NaOH(aq) solution exactly neutralizes 10.0 ml of an HCl(aq) solution. The concentration of the HCl (aq) solution is found to be 1M.
The balanced chemical equation is given as,
NaOH + HCl → NaCl + H₂O
Number of moles of NaOH = molarity × volume /1000
= 5 x 2/1000 = 0.01 moles
With the help of mole ratio between NaOH to HCl which is 1 : 1
Number of moles of HCl given = 0.01 moles
Therefore, concentration = moles/volume x 1000
= 0.01/10 x 1000 = 1M
Hence, the concentration of the HCl (aq) solution is 1M.
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how a sample of copper metal can be separated from the mixture ?
Answers
Answer:
It can be separated by simple fractional method