Which option is an isotope with 6 protons and 8 neutrons? (1 point)
O oxygen-6
o carbon-14
o oxygen-14
o carbon-8

answer=H+]=10-7

explain=the same way, a solution with a pH of 5 contains 10-5mol/l of hydrogen ions, a solution with a pH of 6 contains 10-6mol/l of hydrogen ions, while the solution with a pH of 7 contains 10-7mol/l of hydrogen ions

Answer:

C.

Explanation:

In warm air, stuff expands, and in cold air, things condense, or decrease in size.

A) In ethanol, the OH group is present. This means an H atom is attached to an O atom. The electronegativity of an O atom is much greater than an H atom because of this the H atom will get a partial positive charge and the O atom will get a partially negative charge. This is known as a dipole. Hence dipole-dipole interactions will get generated in the molecule and attractive forces will be produced among the molecules of ethanol.

B) There is no hydrogen bonding between diethyl ether molecules because there is no hydrogen atom attached to an electronegative atom like oxygen or nitrogen. So diethyl ether does not show hydrogen bonding.

C) Chlorine is less electronegative as compared to oxygen and nitrogen so it does not show hydrogen bonding. So, ethanol has more hydrogen bonding than ethyl chloride.

D) In trimethylamine, the nitrogen atom is not attached to any hydrogen atoms. So, it will not show any hydrogen bonding.

According to above mentioned points, we can conclude that out of the given options ethanol will have maximum hydrogen bonding.

So, the correct option is (A).

Additional Information:

Properties of hydrogen bonding :

i) Solubility: Because of the hydrogen bonding between water and alcohol molecules, lower alcohols are soluble in water.

ii) Volatility: Compounds having hydrogen bonding between different molecules have a higher boiling point and a higher boiling point means the compound is less volatile.

iii) Viscosity and surface tension: The substances which contain hydrogen bonding exist as an associated molecule. They have higher viscosity and high surface tension

the process plants use sunlight to synthesize food

Answer:

It is when green plants and other organisms transform light energy into chemical energy.

To record the melting point of tetradecanol, it is important the temperature is increase by little degrees after each trial.

The thermometer attached to the capillary tube was immersed in water without thermometer.

Usually heating curve describes the temperature change for a sample which passes through different states of matter.

The temperature than decreases and the solution in beaker cools down. To determine the melting point, it is important to keep the temperature consistent.

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Answer:

Exothermihic chart

Explanation:

Your answer is CaO.I hope that my answer helped you..

Answer:

As light is emitted from the filament, the energy in the metal is replaced as lightbulbs absorb background radiation. This prevents the filament from burning out quickly but the radiation cannot be used as power so electricity is still required for the lightbulb to work.

Answer:

[tex]\boxed {\boxed {\sf B. \ 1170 \ Joules }}[/tex]

Explanation:

We are asked to find how much heat a sample of copper absorbs when the temperature is increased.

Since we know the mass, temperature increase, and specific heat capacity, we can use the following formula to calculate heat.

[tex]q= mc \Delta T[/tex]

The mass of the copper sample is 100 grams, the temperature is changed or increased by 30.0 degrees Celsius, and the specific heat of copper is 0.39 Joules per gram degrees Celsius.

Substitute the values into the formula.

[tex]q= (100 \ g )(0.39 \ J/g \textdegree C ) (30.0 \textdegree C )[/tex]

Multiply the first two values. Note that the units of grams cancel.

[tex]q= 39 \ J/ \textdegree C (30.0 \textdegree C )[/tex]

Multiply again, this time the units of degrees Celsius cancel.

[tex]q= 1170 \ J[/tex]

The copper sample absorbs 1170 Joules of heat and Choice B is correct.

Answer:

gggggggggg

Explanation:

gggggggg

The tripeptide formed from threonine, glycine and alanine is neutral at the pH of 7.3. The carboxylic end is negative charged by donating its proton to form the NH₃⁺ group.

Peptides are protein units formed from two or more amino acids bonded through peptide bonds. There are essential and non-essential amino acids. Essential amino acids have to be uptake from food and non-essential amino acids are synthesized inside the body.

Threonine is an essential amino acid with a CH₃CHOH side group. Glycine has the simplest side group hydrogen and alanine has  CH₃ side chain. Both glycine and alanine are non-essential amino acids.

Each amino acids are represented with a three letter code or one letter symbol. Thus threonine is T,  G for glycine and A for alanine. At a pH of 7.3 the peptide formed from these amino-acids contains a negatively charged carboxylic end.

A positively charged amino end made by protonation from the acid group make the overall charge zero. The structure of the peptide is given in the uploaded image.

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Based on comparison of energy produced per kilogram, a given mass of methane produces more energy than similar masses of either paraffin or isopropanol, therefore;

Methane is a good choice as a fuel

The reason for the above comparison conclusion is as follows:

The given information:

The details of the combustion of the methane gas, CH₄, are as follows;

The mass of the methane gas placed in the calorimeter, m = 40.0 g

The amount of heat released from the combustion of the 40.0 grams of methane = 2,800 kJ

The data from online resources of paraffin  and isopropanol includes

1. The energy value of paraffin = 46 MJ/kg

The energy value of isopropanol = 33.6 MJ/kg

The energy produced from 1 kilogram of methane gas is given as follows;

40.0 g of methane gas produces 2,800 kJ of energy, therefore;

1 kg = 1,000 g of methane gas will produce, 2,800kJ/(40.0 g) × 1,000 g = 70,000,000 J

Therefore;

1 kg of methane produces 70,000,000 J = 70 MJ of energy

Therefore, energy produced from methane = 70 MJ/kg

Given that methane produces more than twice the amount of energy that

is produced from similar mass of isopropanol and more than one and half

times the amount of energy that is produced from the same mass of

paraffin, methane is a good choice as a fuel for energy

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Answer:

D / 15.0 g

Explanation:

3 % volume thus shows that there are 3 g of an solute in every 100mL of solutions

.. there will be 3 × 5000÷ 100 of H2O2 in a 500 mL bottle

I think 2 answer is write

Answer:

All of the above

Explanation:

Proteins contain a long chain of amino acids which are a chain of oxygen, nitrogen, carbon, hydrogen or sulfur.

HOPE THIS HELPED

Answer:

The total consumer surplus is 240.

Explanation:

If p=12 then q=20

0.5×(36−12)×20=240

here's the graph to help you see the change.

Answer:

Ksp = [ Cu+² ] [ OH-] ²

molar mass Cu(oH )2 ==> M= 63.546 (1) + 16 (2) + 1 (2) = 97.546 g/mol

Ksp = [ Cu+² ] [ OH-] ²

Ksp [ cu (OH)2 ] = 2.2 × 10-²⁰

|__________|___Cu+² __|_2OH-____|

|Initial concentration(M)|___0__|_0______|

|Change in concentration(M)|_+S |__+2S__|

|Equilibrium concentration(M)|_S _|2S___|

Ksp = [ Cu+² ] [ OH-] ²

2.2 ×10-²⁰ = (S)(2S)²= 4S³

[tex]s = \sqrt[3]{ \frac{2.2 \times {10}^{ - 20} }{4} } = 1.8 \times {10}^{ - 7} [/tex]

S = 1.8 × 10-⁷ M

The molar solubility of Cu(OH)2 is 1.8 × 10-⁷ M

Solubility of Cu (OH)2 =

[tex]Cu (OH)2 = \frac{1.8 \times {10}^{ - 7} mol \:Cu (OH)2 }{1L} \times \frac{97.546 \: g \: Cu (OH)2}{1 \: mol \: Cu (OH)2} \\ = 1.75428 \times 10 ^{ - 5} [/tex]

I hope I helped you^_^

Answer:

Explanation:

Explanation:

the molecular weight of K2SO3 is 158. 2598 m/s.

Answer:

0.015 M

Explanation:

For a first order reaction;

ln[A] =ln[A]o - kt

[A] = final concentration

[A]o =initial concentration

k= rate constant

t= time taken

ln[A] =ln[A]o - kt

ln[A] = ln(0.0500) - 6.7 x 10-4 (30 × 60)

ln[A] = -2.9957 - 1.206

ln[A] = -4.202

e^ln[A] = e^(-4.202)

A= 0.015 M

Answer:

I'm not 100% sure but I think A. "None of these" is correct

Explanation:

Option B. "aq" denotes that the substance is an aqueous solution

Option C. "l" means the element is in a liquid state

Option D. "g" denotes that the substance is in a gaseous state

Hope this helped :))

The phase or state of matter is the form that is observable and is in the form of solid, liquid, or gas. The phases of the matter can be expressed as aq, l, g, s. Thus, option A is correct.

Phases of matter are distinctive and observable matters that have varying particle composition, volume, shape, symbols, etc. There are four known states of matter namely gas, liquid, plasma, and solid.

The different phases of matter have different properties like the arrangement of the particles in solid are very closed, liquids are loosely bonded, and gases have free-flowing. This makes solid rigid, liquids and gases free flow.

The phases of matter can be expressed in the equations in the brackets along the reactants and products. The solids are represented as (s), liquids (l), gases (g), and aqueous (aq).

Therefore, option A. none of these is the correct option.

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Answer:

Writing a balanced Equation for the reaction

Br₂ + 3Cl₂ ==> 2BrCl₃

Kc = [BrCl₃]² / [Br₂][Cl₂]³

Each Concentration (n) = moles/volume of container.

(nBrCl₃)= 1/6 = 0.167moldm-³

(nBr₂) = 2/6 = 0.333moldm-³

(nCl₂) = 6/6 = 1moldm-³

Kc = (0.167)² / (0.333)(1)³

Kc = 0.0838.

Answer:

C. sedimentary rock

Explanation:

Deposition is basically a process in which sediments are added to land.

DNA and RNA can also be ISOLATED from the same biological sample.

So the answer is no, both DNA and RNA are together.

Answer:

so the answer is no

both DNA and RNA are together.

Explanation:

DNA and RNA can also be ISOLATED from the same. biological sample

Explanation:

They are called or known as cations

Answer:

C2H5P

is the right answer

Answer:

1. C

Carbon atoms

2. C

CH3CH2OH

3. C

extended structure

AND 4. B

One grey sphere, four white spheres, one red sphere

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The term which describe the repeated arrangement of same molecules is extended structure. Thus option D is correct.    

Extended structure can be defined as a structure in which the subunits are arranged in a repeating pattern and occur in a consistent ratio.

Sodium chloride and diamond are some of the example of extended structure.

The expanded or extended  structure departs from the bilayer configuration, with well-separated hydrophilic and hydrophobic layers made up of propagating chains along the calixarene cavity axis are some characteristics.  

Thus, the term which describe the repeated arrangement of same molecules is extended structure. Thus option D is correct.  

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Your question is incomplete but probably your complete question was

Which term describes the repeated arrangement of the molecule?

A. Bonds

B. Atoms

C. Molecular Model

D. Extended Structure

Explanation:

A radical is is an atom, molecule, or ion that isnt paired up with at least one valence electron.

Answer:

a radical also called a free radical is a molecule that contains at least one unpaired electron.

I hope this helps

Answer:

C H 3 C H C (C H 3) C H 2 C H 2 C H 2 C H 3

Explanation: