In substitution reactions, (CH3)3C-I reacts at the same rate with Br- and Cl- even though Br- is a more reactive nucleophile than Cl-. Why?A. (CH3)3C-Br reacts by SN1 mechanism whose rate is independent of nucleophile reactivity. B. (CH3)3C-Br reacts by SN2 mechanism and therefore all nucleophiles react at the same rate regardless of their reactivity. C. The t-butyl carbocation is so reactive, the measurable rate of it's reaction with different nucleophiles is imperceptible. D. The t-butyl group sterically hinders nucleophiles, making different nucleophiles appear to react at the same rate.

The balanced chemical equation is for the aqueous reaction of hydroiodic acid (HI) and zinc metal is Zn + 2HI → ZnI₂ + H₂.

The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.

Now write the balanced chemical equation

Zn + 2HI → ZnI₂ + H₂

Here Zn is a reducing agent, HI is an oxidizing agent.

Thus from the above conclusion we can say that The balanced chemical equation is for the aqueous reaction of hydroiodic acid (HI) and zinc metal is Zn + 2HI → ZnI₂ + H₂.

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Answer:

2 Fe(HCO₃)₃ + 3 CaO ---> 1 Fe₂O₃ + 3 Ca(HCO₃)₂

Explanation:

The unbalanced equation:

Fe(HCO₃)₃ + CaO ---> Fe₂O₃ + Ca(HCO₃)₂

Reactants: 1 iron, 3 hydrogen, 3 carbon, 10 oxygen, 1 calcium

Products: 2 iron, 2 hydrogen, 2 carbon, 9 oxygen, 1 calcium

As you can see, the reaction is clearly unbalanced because the number of each element on both sides is different. The best way to go about balancing an equation is by trying to first balance an element located in only one molecule on either side. For example, I started trying to balance  iron. After balancing iron, I looked to balance other elements that would have been affected by the new coefficient (i.e., hydrogen, carbon).

The balanced equation:

2 Fe(HCO₃)₃ + 3 CaO ---> 1 Fe₂O₃ + 3 Ca(HCO₃)₂

Reactants: 2 iron, 6 hydrogen, 6 carbon, 21 oxygen, 3 calcium

Products: 2 iron, 6 hydrogen, 6 carbon, 21 oxygen, 3 calcium

Now, with these coefficients, the quantity of each element on both sides is the same.

The molar mass of the gas is obtained as 32.1 g/mol.

The molar mass has to do with the mass one mole of a substance. We know that according to the question, we can be able to obtain the number of moles of the compound from the ideal gas equation.

This is how we are able to get the number of moles of the gas as 0.14 moles. Now we need to use the information that we have to get the molar mass of the gass.

Number of moles = mass/ molar mass

Molar mass = mass/Number of moles

Molar mass =  4.5g/0.14  moles

= 32.1 g/mol

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Answer:

123.1L

Explanation:

Given parameters:

Molarity of Cu(NO₃)₂  = 0.650M

Mass of  Cu(NO₃)₂ = 15g

Unknown:

Volume of  Cu(NO₃)₂ = ?

Solution:

To solve this problem, we have to first find the number of moles of the given mass;

  Number of moles of Cu(NO₃)₂  = \(\frac{mass}{molar mass}\)

   Molar mass of Cu(NO₃)₂  = 63.5 + 2 (14 + 3(16)) = 187.5g/mol

 Number of moles of Cu(NO₃)₂  = \(\frac{15}{187.5}\)  = 0.08 mol

Molarity is given as;

  Molarity  = \(\frac{number of moles }{volume}\)  

         Volume  = \(\frac{number of moles }{molarity }\)  

  Insert the parameters and solve;

        Volume  = \(\frac{0.08}{0.65}\)  = 0.12L

Now mL;

         1L  = 1000mL

        0.12L will give 1000 x 0.12  = 123.1L

Answer:

oxidation-reduction or redox reaction

Explanation:

n

The law involved is Charles law and the volume the gas will occupy at 30°C is 599.46mL. Details about Charles law can be found below.

Charles law gives the relationship between the volume of a gas and its temperature. The volume of a gas can be calculated using the following equation:

V1/T1 = V2/T2

Where;

550/278 = V2/303

303 × 550 = 278V2

166,650 = 278V2

V2 = 599.46mL

Therefore, the law involved is Charles law and the volume the gas will occupy at 30°C is 599.46mL.

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Explanation:

Since Kc is

\(k = \frac{(products)}{(reactants)} \)

You can insert the Hydrogen and Iodine gas on top, and Hydrogen Iodide in the denominator.

Note: you can only include gases and aqueous species in an equilibrium expression, and all the species in this reaction are gaseous so you're good.

Inserting their molarity at equilibrium into their places, and you can solve. Don't forget to make the coefficient of HI turn into a power.

Answer:

Explanation:

1,2,4,

The equations that show combustion are equations A, B and D.

When we talk about combustion, the idea is that the substance would be burnt in oxygen. In other words, the combustion can be taken to be an oxidation reaction. It is an oxidation reaction in the sense that the oxidation number of the substance that is reacting with the oxygen would become increased.

When we look at the equations that we have, it is quite easy to pick out among the balanced reaction equations that are shown here the ones that has to do with the burning of the substance in oxygen and a consequent rise in the oxidation number.

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To prepare the cyclohexadiene compound CH₂OCH₃, the best toluene sequence of reaction is option B.

Sequential reactions are linked reactions in which the product of one reaction becomes the substrate of another. Sequential reactions occur in industrially significant processes such as methane chlorination. Toluene is known to be used in the separation of cyclohexene from cyclohexanol because the former is easily dissolved in toluene and thus cyclohexene can be easily distilled out of the mixture.

The sequence of reactions needed to prepare cyclohexadiene compound CH₂OCH₃ with toluene is NBS and heat reacting with CCl₄ to give NaOCH₃ and CH₃OH which produces Na, NH₃ and CH₃OH.

The full question is:

Starting with toluene, which sequence of reactions below works best to prepare the following cyclohexadiene compound?

A) toluene (reaction displayed)

B) toluene (reaction displayed)

C) toluene (reaction displayed)

D) all the above would be good syntheses

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The mass (in grams) of AsH₃ made from 22.22 grams of H₂ is 571.63 grams

The mass of AsH₃ produced can be obtained as illustrated below:

2As + 3H₂ -> 2AsH₃ + 150 Kcal

From the balanced equation above,

6.06 grams of H₂ reacted to produce 155.9 grams of AsH₃

Therefore,

22.22 grams of H₂ will react to produce = (22.22 × 155.9) / 6.06 = 571.63 grams of AsH₃

Thus, from the above calculation, we can conclude that the mass of AsH₃ produced from the reaction is 571.63 grams

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Answer:

Kindly check the picture attachment.

Explanation:

H2CO3 --------------------------> H2O + CO2

The reaction above is a decomposition reaction showing how the carbonic acid that is H2CO3 decomposed into H2O and CO2. The study of how reactants react(that is the amount in which they react) in order to form a product (and the amount of product formed) is known as the stoichiometry.

H2CO3 which is the reactant has three oxygen atoms which are all directly bonded to the carbon atom. One of the oxygen atom is bonded doubly to the carbon atom.

CO2 and H2O are the products. The CO2 is linear, O=C=O with the two oxygen atoms bonded doubly each to each carbon atoms. The H2O is bent.

Answer:

So what's the question?

Answer: C(2)H(5)OH + 3O(2) —> 3H(2)O + 2CO(2)

Explanation:

*The number in parentheses or

( ) represents the subscript of the element

Carbon-2

Hydrogen-6

Oxygen-7

I hope this is helpful.

Answer:

O2

Explanation:

for find the limiting reactant you must calculate the moles of the reactants from the amount that you have and from the MM:

MM FeS2 = 120n  = 26.2g / 120g/mol = 0,218 mol

MM O2  = 32n = 5,44g/32g/mol = 0,17 mol

The limiting reactant is  

O2

The volume of \(N_2O_5\) needed to produce 9.64 L of \(NO_2\) is 4.97 L, calculated using stoichiometry and the ideal gas equation.

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The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

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Stable isotopes are non-radioactive form of atoms.

properties of stable isotopes are :-

Atoms found in nature are either stable or unstable. An atom is stable if the forces among the particles that makeup the nucleus are balanced. An atom is unstable (radioactive) if these forces are unbalanced; if the nucleus has an excess of internal energy.

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this question is incomplete, above content might be helpful

Answer:

\(\longmapsto \: \frak[ hello \: mate ]\)

The measured mass of a sample would have unit as "Kilogram "

10 molecules of water (H₂O) are produced.

The balanced chemical equation for the reaction between hydrogen and oxygen to produce water is:

2H₂ + O₂ → 2H₂O

This means that for every 2 molecules of hydrogen and 1 molecule of oxygen that react, 2 molecules of water are produced. Therefore, for 10 molecules of hydrogen and 5 molecules of oxygen, the number of molecules of water produced can be calculated as follows:

Number of moles of hydrogen = 10 molecules / 6.022 x 10²³ molecules/mol = 1.66 x 10⁻²³ moles

Number of moles of oxygen = 5 molecules / 6.022 x 10²³ molecules/mol = 8.30 x 10⁻²⁴ moles

From the balanced equation, 2 moles of water are produced for every 2 moles of hydrogen used, or 1 mole of water for every mole of hydrogen used.

Therefore, the number of moles of water produced is equal to the number of moles of hydrogen used, which is 1.66 x 10⁻²³ moles.

Finally, we can convert moles of water to molecules of water by multiplying by Avogadro's number: 1.66 x 10⁻²³ moles x 6.022 x 10²³ molecules/mol = 9.98 molecules, which we can round up to 10 molecules of water.

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This is an exercise in the general or combined gas law.

To start solving this exercise, we obtain the following data:

We use the following formula:

P₁V₁T₂ = P₂V₂T₁ ⇒ General formula

Where

We clear the formula for the initial volume:

\(\boldsymbol{\sf{V_{1}=\dfrac{P_{2}V_{2}T_{1}}{P_{1}T_{2}} } }\)

We substitute our data into the formula to solve:

\(\boldsymbol{\sf{V_{1}=\dfrac{(3.69 \not{atm})(56.4 \ ml)(295.5 \not{k})}{(1.95 \not{atm})(284.9\not{k})} }}\)

\(\boldsymbol{\sf{V_{1}=\dfrac{61498.278}{555.555} \ lm }}\)

\(\boxed{\boldsymbol{\sf{V_{1}=110.697 \ lm }}}\)

The helium-filled balloon has a volume of 110.697 ml.

Answer:

111  ml

Explanation:

Use the general rule for gases:

P1 V1 / T1    =   P2 V2 / T2      Looking for V1     T must be in Kelvin

re-arrange to :

V1 =   P2 V 2  * T1 / (T2 * P1)      <==== now sub in the values

V1 = 3.69 * 56.4 * (22.5 + 273.15) / [(11.9 + 273.15) * 1.95]

V1 = 110.6949 ml

    for correctness, the answer should only have THREE significant digits as all of the factors have three SD

V1 = 111 ml

There are 7 protons, 7 electrons, and 7 neutrons in an atom of nitrogen. It is an element that can have seven protons is nitrogen, which has the atomic number seven.

Each atom's nucleus contains two subatomic particles called neutrons and protons. Hydrogen is the sole exception, as it has a single proton in its nucleus.

Seven protons and 7 neutrons make up nitrogen. On the other hand, a radioactive form of N possesses eight neutrons. Atomic number 7 has seven protons, whereas radioactive nitrogen has eight neutrons.

In comparison to positively charged protons, neutrons are somewhat heavier and have an electric charge that is neither positive nor negative.

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The existence of positively charged particles in gas discharge tubes was first experimentally verified by Goldstein.

In 1886, Goldstein conducted experiments on the properties of cathode rays and found that when high voltage was applied to a gas-filled discharge tube, a beam of positively charged particles was produced that moved in the opposite direction of the cathode rays. He named these particles "canal rays" and concluded that they were positively charged ions that had been generated by the collision of cathode rays with gas molecules in the tube.

Goldstein's discovery of positively charged particles in gas discharge tubes helped to confirm the existence of ions, which played a critical role in the development of modern physics and chemistry.

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Answer:

name four agricultural inputs are subsidized by the government

0.297 kJ of heat is needed to raise the temperature of 10g of aluminum from 22 degrees Celsius to 55 degrees Celsius.

The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.

It is given by the formula -

                                                  Q = mcΔT

where, Q = amount of heat

m = mass

c = specific heat

ΔT = Change in temperature

Given,

mass = 10g

c = 0.901J/g⁰C

Initial temperature (T₁) = 22⁰C

Final Temperature (T₂) = 55⁰C

Q = mcΔT

= 10 × 0.901 × (55 -22)

= 297.33 J = 0.297 kJ

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Answer:

False

Explanation:

Chemical and Physical changes happen uniquely, they cannot happen at the same time. When you crumble a piece of paper you don't change its chemical form you change its physical form. When a piece of metal rusts its chemical composition changes, leading me to believe it is false.

Good luck on the rest of your assignment/test!

Answer: 20.9 billion years.

Explanation: To estimate the age of the rock, we can use the fact that the half-life of uranium-238 is 4.47 billion years. This means that half of the uranium-238 in the rock would have decayed into lead-206 after 4.47 billion years, and half of what remains would decay in the next 4.47 billion years, and so on.

If 20% of the uranium-238 in the rock has decayed into lead-206, then 80% of the original uranium-238 is still present in the rock. This means that the rock has gone through one half-life of uranium-238 decay, and we can estimate its age by using the graph on page 253.

According to the graph, the ratio of lead-206 to uranium-238 after one half-life is approximately 0.027. This means that the rock contains 0.027 times as much uranium-238 as it did originally, and the remaining 80% of the uranium-238 corresponds to 0.8 times the original amount.

Therefore, we can estimate the original amount of uranium-238 in the rock as follows:

Original amount of uranium-238 = (0.8) / 0.027 = 29.63 times the current amount

Next, we can use the fact that each half-life corresponds to a reduction in the amount of uranium-238 by a factor of 2, to estimate the number of half-lives that have passed since the rock formed:

Number of half-lives = log2(29.63) = 4.88

Finally, we can estimate the age of the rock as follows:

Age of the rock = (4.88) x (4.47 billion years per half-life) = 20.9 billion years

Therefore, we can estimate that the age of the rock is approximately 20.9 billion years.

Answer:

nonpolar covalent bond

Explanation:

To determine the level of the polarity of the bond, we can make use of the electronegativity values.

EN H = 2.2

By taking the electronegativity difference between the two elements on the bond, we can gauge whether the bond is ionic, polar covalent, or nonpolar covalent.

EN difference = 2.2 - 2.2 = 0

It's safe to say that the H-H bond is nonpolar covalent.

Answer: Shown below

Explanation:

CaCl2=calcium chloride

Mg(NO3)2=Magnesium nitrate

ZaCl2=Zinc Chloride

NH2Cl=Chloramine

AgNO2=Silver nitrate

NaCl= Sodium chloride

KI=Potassium iodide

PbSO4=Lead(II) Sulfate

n82CO3=Sodium carbonate

KNO3=Potassium nitrate

N82SO4=Sodium Sulfate.

I hope this helped please give Brainliest!

The name of the compounds and the involved ion are as follows;

Ionic compound is any of a large group of chemical compounds consisting of oppositely charged ions, wherein electron transfer, or ionic bonding, holds the atoms together.

Ionic compounds, when in an aqueous solution, dissociates into its respective ions. This question gives the chemical formula of certain compounds. For example, the sodium ions attract chloride ions and the chloride ion attracts sodium ions. The result is a three-dimensional structure of alternate Na⁺ and Cl⁻ ions.

The names of the chemical compound and the ionic elements that make them up are given in the main answer part.

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The reaction is spontaneous under conditions of low pressure and high temperature

We can say that a reaction is spontaneous when we know that the reaction is able to go on on its own. This implies that there is a mnimum energy that is required for the reaction to proceed.

The reaction is thus a sort of a self propagating system that goes on freely of its own accord.. We can see that what is going on here is the decomposition of the nitrogen V oxide gas as shown.

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