How do you draw structural formulas 2,4-dimethylhexane; 4-methyl-2-pentene; 4-chloro-7-methyl-2-nonyne

Answer:

Its B

Explanation:

Answer:

I think the answer is polar covalent as there will be an unequal amount of electrons shared/available. An ionic bond will not take place because the valance shell of the larger atom contains more than 1 electron.

Explanation:

Water is called the "universal solvent" because it is capable of dissolving more substances than any other liquid. This is important to every living thing on earth. It means that wherever water goes, either through the air, the ground, or through our bodies, it takes along valuable chemicals, minerals, and nutrients.

Esterification is a chemical reaction between an alcohol and a carboxylic acid that results in the formation of an ester and a molecule of water.

Esterification  is an important class of organic reactions and is widely used in the synthesis of flavors, fragrances, and plastics. In this report, we will explore the fundamental principles and practical applications of esterification.

The experimental procedure involves the reaction between methanol and acetic acid to form methyl acetate and water. The reaction was carried out in a round-bottom flask equipped with a condenser and a thermometer. The reactants were mixed in stoichiometric amounts, and a small amount of sulfuric acid was added as a catalyst. The flask was heated using a hot plate and maintained at a constant temperature of 60°C.

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According to the Arrhenius concept a weak electrolyte that produces H+ ions in solution is an acid. Weak electrolytes poorly conducts.

An electrolyte is a molten solution containing mobile ions. For example ZnCl₂, NaCl are electrolytes containing their mobile ions. The mobility and conductivity of the ions depends on the concentration and size of the ions.

There are various concepts defining acids and bases. Th earlier concept to defines acids and bases was Arrhenius concept. As per this concept the acids are substances which furnish H+ ions into the solution whereas, bases are substances giving OH- ions in the solution.

Therefore, a weak electrolyte giving H+ ions in solution is an acid. More over weak electrolytes does not conduct as strong electrolytes.

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Answer:

69.23g

Explanation:

Find out how many moles is in 9.89g of H2.

number of moles = mass(g) / molar mass

1 is the molar mass of hydrogen (to the nearest whole)

relative molecular mass of H2: 2*1 = 2

number of moles of H2 = 9.89/2 = 4.945

1 mol of H2 is produced from 2 mol of Li

so

4.945 mol of H2 produces 9.89 mol of Li

mass(g) = number of moles * molar mass

7 is the molar mass of Lithium (to the nearest whole)

mass = 9.89 * 7 = 69.23

69.23 grams of Li are needed to produce 9.89 of H2

Answer:

How do amoeba respire.

Define Diffusion.

Gallium is the element that belongs to the group 3 and the fourth period. Ga is symbol of Gallium.

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Answer:

all you have to so answer it all done

On CK-12 all of these answers are correct

1.9

1.888

1.89

1.88

The molality of a 10.0 % by mass solution of sodium chloride (NaCl) is 1.7M.

Molarity of any solution will be calculated as number of moles of solutes present in per litre of the solution.

Moles of the substance will be calculated as:

n = W/M, where

W = given mass

M = molar mass

Given that percent mass of NaCl = 10% i.e. 10g of NaCl is present in 100 g of solution.

We know that 1 g = 0.001 L

100 g = 0.1 L

Moles of NaCl = 10g / 58.44g/mol = 0.17 mol

Molarity of NaCl = 0.17 / 0.1 = 1.7M

Hence required molarity is 1.7 M.

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The combined mass of its component elements after heating is 68.0 g.

According to the law of conservation of mass, matter is neither created nor destroyed but is converted from one form to another.

When a substance is decomposed into its components, the total mass of components recovered after heating must be equal to the mass of substance before heating in accordance with the law of conservation of mass.

As such, the mass of the elements obtained after heating must also be 68.0 g.

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The  name of the organic compound with structural formula of nine carbons and sixteen hydrogens  depends on different factors

The nomenclature of the organic molecule comprising nine carbons and sixteen hydrogens is determined by the arrangement of its atoms as well as the nature of the chemical bonds linking them together. Cyclononane is a circular formation of nine carbon atoms.

An organic substance belongs to a group of chemicals that have carbon atoms linked to each other and other atoms through covalent bonds, and are present in the biological cells. Organic compounds contain usual elements such as carbon, as well as hydrogen, oxygen, and nitrogen.

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Answer:

the composition cganges

0.31 L

Math

Pre-Algebra

Equality Properties

Chemistry

Atomic Structure

Aqueous Solutions

Equilibrium - Acid/Base

Step 1: Define

[Given] 3.5 M HCl

[Given] 1.1 moles

[Solve] Liters solution

Step 2: Solve

Step 3: Check

Follow sig fig rules and round. We are given 2 sig figs.

0.314286 L ≈ 0.31 L

Answer:A

Explanation:

Answer:

An ion found in some compounds used as antiperspirants contains 13 protons and 10 electrons. What is its symbol?

Solution

Because the number of protons remains unchanged when an atom forms an ion, the atomic number of the element must be 13. Knowing this lets us use the periodic table to identify the element as Al (aluminum). The Al atom has lost three electrons and thus has three more positive charges (13) than it has electrons (10). This is the aluminum cation, Al3+.

It is likely that the temperature of the steam is higher than the temperature of the water boiling in the kettle. The intense heat felt by Alka from the puff of steam supports this observation.

In general, the temperature of steam produced from boiling water is higher than the temperature of the water itself. When water boils, it undergoes a phase change from a liquid to a gas, forming steam.

During this phase change, the water absorbs heat energy from the heat source, such as a stove or electric kettle, and converts it into the latent heat of vaporization.

The boiling point of water is 100 degrees Celsius (212 degrees Fahrenheit) at standard atmospheric pressure. At this temperature, the water molecules have enough energy to overcome the intermolecular forces and transition into the gaseous state.

However, steam is hotter than the boiling point of water because it contains additional heat energy in the form of latent heat. The heat energy absorbed during vaporization is stored as latent heat within the steam. As the steam gushes out of the spout of the kettle, it releases this latent heat energy, which can be felt as intense heat.

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There are approximately 0.16 moles of gas present in the lungs.

To solve this problem, we can use the ideal gas law, which relates the pressure (P), volume (V), number of moles (n), and temperature (T) of a gas:

PV = nRT

where R is the gas constant.

First, we need to convert the temperature to Kelvin:

T = 37°C + 273.15 = 310.15 K

Next, we can plug in the given values:

P = 1.0 atm

V = 4.0 L

T = 310.15 K

We also need to find the value of R, which depends on the units we are using for pressure, volume, and temperature. In this case, we are using atmospheres, liters, and Kelvin, so we can use the value:

R = 0.08206 L·atm/K·mol

Now we can rearrange the ideal gas law to solve for the number of moles:

n = PV/RT

n = (1.0 atm)(4.0 L)/(0.08206 L·atm/K·mol)(310.15 K)

n = 0.1638 mol

Therefore, there are approximately 0.16 moles of gas present in the lungs.

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Answer:Soluble

Explanation:Soluble:(of a substance) able to be dissolved, especially in water.

Answer:

To determine the change in mass of A over the given time period, we need to find the difference between the initial mass of A and the final mass of A.

From the given table, we can see that the initial mass of A at t = 0 (start time) is 12.4 g and the final mass of A at t = 60 minutes (end time) is 6.2 g.

Therefore, the change in mass of A over 60 minutes is:

Final mass of A - Initial mass of A

= 6.2 g - 12.4 g

= -6.2 g

The negative sign indicates that the mass of A decreased over time, which means that A underwent some kind of reaction or process that caused it to lose mass.

The change in mass of A over 60 minutes is -6.2 grams.

To determine the change in mass of A over 60 minutes, we need to compare the initial mass to the final mass.

From the given information, we can see that the mass of A decreases over time.

Let's calculate the change in mass.

Initial Mass of A: 12.4 g

Final Mass of A: 6.2 g

Change in Mass of A = Final Mass of A - Initial Mass of A

= 6.2 g - 12.4 g

= -6.2 g

The change in mass of A over 60 minutes is -6.2 grams.

Note that the negative sign indicates a decrease in mass.

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Answer: B) Ten moles of sodium hydroxide and five moles of hydrogen gas will be produced

Explanation: Got it right on USATestPrep

Answer: It is either C. or D.

Explanation: I did some reading about it and it talks about fuel but I know that it didn’t say all of them are used as fuels.  maybe I’m wrong

Petroleum is composed of hydrocarbons of various chain length. Different products can be extracted from petroleum but all products cannot be used as fuel.

Hydrocarbons in diesel have higher boiling point than that of gasoline.

Petroleum is a naturally occurring crude liquid mixture of hydrocarbons. Petroleum can be fractionated to different components such as gasoline, kerosene, diesel etc.

Each fraction vary in the number of carbons and hydrogens in it or called the difference in chain length. Kerosene contains 8-16 carbons where as gasoline and diesel have more carbons.

Not all products of petroleum fractionation can be used as fuel. Some of them with effective quality is taken as fuels.

The boiling point of hydrocarbons in diesel is greater (about 130-380 degree Celsius) than the hydrocarbons in gasoline which is having boiling point in he range 30-225 degree Celsius.

Therefore, the statement C is correct.

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Answer:

Three atoms of magnesium can have different masses because each of the three atoms has a different number of neurons.

I hope this helped :)

The differences in masses of the three magnesium atom is due to there differences in there neutron number

Isotopes are members of an element that all have the same number of protons but different numbers of neutrons.

These are 2 or mores type of atoms that have the same atomic number but different nucleon numbers due to the different number of neutron in the nuclei.

The reason why three atoms of magnesium has different masses is due to Isotropy.

The differences in masses of the three magnesium atom is due to there differences in there neutron number.

The differences in masses is caused by the differences of their neutron number.

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Answer:

Actual yield is 38.57

Explanation:

Percentage yield = Actual yield / theoretical yield X 100

Percent yield x theoretical yield / 100 = actual yield

Write the balanced chemical equation:

2Na + CI2 = 2NaCI

Given is 17.25 g Sodium metal (limiting reactant) with excess being chlorine gas

Percent yield is 88%

Mole of Na = 17.25 g / 22.98 = 0.750

Calculate the Theoretical Yield to solve for Actual Yield

Theoretical yield = 0.75 x molar mass of NaCI

Theoretical yield = 0.75 x 58.44 = 43.83 g

When plugged into the original percentage yield formula:

Actual yield = 88 x 43.83 / 100 = 38.57 g

Q = Ksp = 1 × 10^(-12).

Substituting the values into the Nernst equation, we have:

0.799 V = E° - (RT/2F) * ln(1 × 10^(-12))

Now, solving for E°:

E° = 0.799 V + (RT/2F) * ln(1 × 10^(-12))

The value of R is the ideal gas constant, T is the temperature in Kelvin, and F is the Faraday constant.

To find the standard reduction potential at 25°C for the half-reaction Ag2CrO4(s) + 2e¯ → 2Ag(s) + CrO4²-(aq), we can use the Nernst equation, which relates the standard reduction potential (E°) to the equilibrium constant (K) and the reaction quotient (Q).

The Nernst equation is given as follows:

E = E° - (RT/nF) * ln(Q)

Given information:

Ksp = 1 × 10^(-12)

E = +0.799 V (standard reduction potential of Ag+ to Ag)

Since the reaction involves the dissolution of Ag2CrO4(s), the reaction quotient Q can be expressed as [Ag+]²/[CrO4²-].

Since the stoichiometry of the reaction is 2:1 for Ag2CrO4 to Ag+, we can say that [Ag+]² = Ksp.

Therefore, Q = Ksp = 1 × 10^(-12).

Substituting the values into the Nernst equation, we have:

0.799 V = E° - (RT/2F) * ln(1 × 10^(-12))

Now, solving for E°:

E° = 0.799 V + (RT/2F) * ln(1 × 10^(-12))

The value of R is the ideal gas constant, T is the temperature in Kelvin, and F is the Faraday constant.

Please note that without specific values for temperature (T) and the ideal gas constant (R), the exact standard reduction potential at 25°C cannot be determined.

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The specific heat of chromium is 0.436 J/g·°C, assuming no heat is lost to the surroundings.

Using the principle of conservation of energy, we can determine the heat gained by the water, which is equal to the heat lost by the chromium.

The heat gained by the water can be calculated using the formula:

q₁  = m₁  × C₁  × ΔT

where q₁  is the heat gained by the water, m₁  is the mass of water, C₁  is the specific heat of water, and ΔT is the change in temperature of the water.

Substituting the given values, we get:

q₁  = (85.09 g) × (4.184 J/g·°C) × (27.35 °C - 21.20 °C)

q₁ = 1,454.67 J

The heat lost by the chromium can be written as:

q₂ = -q₁ = -1,454.67 J

The heat lost by the chromium can also be expressed as:

q₂ = m₂ × C₂ × ΔT

where m₂ is the mass of chromium, C₂ is the specific heat of chromium, and ΔT is the change in temperature of the chromium.

Substituting the given values and solving for C₂, we get:

C₂ = -q₂ ÷ (m₂ × ΔT)

C₂ = -1,454.67 J ÷ (67.38 g × (97.97 °C - 27.35 °C))

C₂ = 0.436 J/g·°C

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Answer:

A. Decrease in temperature

Explanation:

The statement indicates an endothermic chemical reaction is "Decrease in temperature".

Endothermic reactions generate products by absorbing heat energy from the environment.

The temperature of the reaction mixture rises as energy is released in an exothermic process. The temperature drops when energy is absorbed in an endothermic reaction. A thermometer can be used to monitor temperature changes in the reaction mixture.

An endothermic reaction happens when the temperature of an isolated system drops while the temperature of its surroundings rises. The overall heat of reaction in endothermic reactions is positive (q > 0).

Hence the correct option is A.

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Answer: the anwser is a. cuz i did it so im smart and u should listen to me

Explanation:non>

The data collected by Leah and Paul supports Paul's opinion that matter can exist even when it is not visible.

Support is a term used to describe a range of services and resources offered to individuals in need. It can refer to providing help with practical tasks, such as helping someone to manage their finances or providing transport to medical appointments. It can also refer to providing emotional or social support. This could involve providing counselling or having regular conversations to help someone to feel understood and supported. Support can also refer to offering advice and guidance, or providing a safe space for someone to talk and express their feelings. In its broadest sense, support is about helping someone to have the best quality of life they can.

This is because the mass of the inflated bag is greater than the mass of the empty bag despite the fact that the volume of the inflated bag is much greater. This shows that the inflated bag contains air, which is matter, even though it cannot be seen.

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