Calculate the electrical double layer length for pure water at pH 7. Assume temperature is 300K, and give your answer in units of nm.

Answer:

Number of moles of CO₂ produced = 11.1 mol

Explanation:

Given data:

Mass of ethane = 5.55 mol

Number of moles of CO₂ produced = ?

Solution:

Chemical equation:

2C₂H₆ + 7O₂       →     4CO₂ + 6H₂O

Now we will compare the moles of ethane and carbondioxide.

             C₂H₆          :           CO₂

                 2             :            4

              5.55          :         4/2×5.55 = 11.1 moles

Number of moles of CO₂ produced =  11.1 mol

Answer:

I think it's Hydrogen is equal to aCalcuim plus b

Answer:

The nucleon number of given atom = 51

Explanation:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.

The mass number is also called nucleon number.

The nucleon number of given atom = number of protons + number of neutrons

The nucleon number of given atom = 25 + 26

The nucleon number of given atom = 51

Answer:

Element.

General Formulas and Concepts:

Chemistry

Explanation:

Diatomic Elements are elements that are bonded to themselves. Naturally, these elements are not found alone in nature.

Diatomic Elements:

Hydrogen

Nitrogen

Oxygen

Fluorine

Chlorine

Bromine

Iodine

Since Nitrogen is a diatomic element, we would find Nitrogen in nature as N₂.

Answer:

NH₄⁺ (aq) + OH⁻ (aq) → H₂O (l) + NH₃ (g)

General Formulas and Concepts:

Chemistry - Solutions

Explanation:

Step 1: RxN

NH₄Cl (aq) + NaOH (aq) → H₂O (l) + NH₃ (g) + NaCl (aq)

Step 2: Balance RxN

NH₄Cl (aq) + NaOH (aq) → H₂O (l) + NH₃ (g) + NaCl (aq)

Step 3: Ionic Equations

Total Ionic Equation

Break up aqueous solutions.

NH₄⁺ (aq) + Cl⁻ (aq) + Na⁺ (aq) + OH⁻ (aq) → H₂O (l) + NH₃ (g) + Na⁺ (aq) + Cl⁻ (aq)

Net Ionic Equation

Cancel out spectator ions.

NH₄⁺ (aq) + OH⁻ (aq) → H₂O (l) + NH₃ (g)

Answer:

Percent error =  4.8%

Explanation:

Given data:

Measured value = 26.1 K

Actual value = 24.9 K

percent error = ?

Solution:

Formula:

Percent error = [ measured value - actual value/ actual value] × 100

Percent error =   [26.1 K - 24.9 K/24.9 K] × 100

Percent error = [ 1.2K /24.9K]× 100

Percent error = 0.048 × 100

Percent error =  4.8%

Answer:

Definetly not they would choke on it

Answer:

no please do not do that

Explanation:

it must have been light, so it can be more mobile, and strong to penetrate skin and flesh, and easy to carve so they can put it on a spear.

your welcome and a brainliest would be nice if you can

Answer:

This question is incomplete

Explanation:

This question is incomplete. However, it should be noted that if the containers are compared with an equal average volume, the containers having solids will have larger masses than that containing liquid which will also have a larger mass than that containing gas. This is because solids have there molecules touching each other in compact manner which makes the molecule exert a certain combined force/mass. The molecules of liquid are also close to one another but are not compact like the solids and are hence exerting a lesser force/mass than solids. Gases have free molecules that are far apart and thus are usually the lightest when they occupy the same volume as liquids and solids.

Answer:

Higher chain length, higher boiling point

Polar species are soluble in similar polarity water, Non polar species are soluble in similar non polar oil.

Explanation:

Chain length refers to the number of carbons. As it increases, boiling points of alkanes increase for these compounds. Reason behind is that longer chain molecules become more entangled along with each other.

Polarity bonds atoms together, by chemical bonding - through sharing seperated electric charge ie electrons. Polar Solvents have large dipole moments, contain bonds between atoms with different electro negativities. Non Polar solvents contain bonds between atoms with similar electro negativities.

Answer:26.771%

Percent composition by element

Element Symbol Mass Percent

Xenon Xe 73.229%

Oxygen O 26.771%

Answer:

Sodium Sulfide

Explanation:

I looked it up

Answer:

There are 18 moles of oxygen in 3.0 mole of glucose...

Explanation:

Does it help???

Answer:

18.066× 10²³ molecules

Explanation:

Given data:

Number of moles of oxygen = 3.0 mol

Number of molecules = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ molecules

3 mol  × 6.022 × 10²³ molecules  / 1 mol

18.066× 10²³ molecules

Answer:

3 Ca(s) + 2 Al(NO₃)₃(aq) ⇒ 3 Ca(NO₃)₂(aq) + 2 Al(s)

Explanation:

Let's consider the single displacement reaction between solid calcium metal and aqueous aluminum nitrate. The unbalanced chemical equation is:

Ca(s) + Al(NO₃)₃(aq) ⇒ Ca(NO₃)₂(aq) + Al(s)

We have 3 nitrates on the left and 2 nitrates on the right, so we will multiply Al(NO₃)₃(aq) and Ca(NO₃)₂(aq) by 2 and 3, respectively, to balance them.

Ca(s) + 2 Al(NO₃)₃(aq) ⇒ 3 Ca(NO₃)₂(aq) + Al(s)

Finally, we have to add coefficients before Ca(s) and Al(s) to balance the equation.

3 Ca(s) + 2 Al(NO₃)₃(aq) ⇒ 3 Ca(NO₃)₂(aq) + 2 Al(s)

Answer:

50/36 = 25/18

Explanation:

Solution at attachment box

Molality = mole of dissolvable (this question glucose) / kg of water

Answer:

Molality = 1.38 mol/Kg

Explanation:

Given data:

Molality of solution = ?

Mass of C₆H₁₂O₆ = 150.0 g

Mass of water = 600.0 g (600 g ×1 kg/1000 g= 0.6 Kg)

Solution:

Number of moles of C₆H₁₂O₆:

Number of moles = mass/molar mass

Number of moles = 150.0 g/180.16 g/mol

Number of moles = 0.83 mol

Molality:

Molality = moles of solute / kg of solvent

Molality =  0.83 mol /0.6 Kg

Molality = 1.38 mol/Kg

Answer:

It depends on the identity of the outer atom

Explanation:

We must recall that the polarity of a molecule depends on difference In electronegativity between atoms as well as the shape of the molecule.

When a central atom has no lone pairs and all the groups in the molecule are bonding, the identity and arrangement  of the outer atoms will determine the polarity of the molecule.

A polar molecule is formed by certain types of outer atoms arranged in  certain ways around the periodic table and vice versa.

The identification of the outer atom determines whether the molecule is polar or non-polar. The CH4 compound, for illustration, is a non-polar compound.

There really is no dipole present here because the net dipole moments cancel one another out. As a result, the dipole moment is negligible.

The molecule CH3Cl, for instance, is a polar molecule. There is indeed a dipole force here, and the net polarization isn't zero.

As a result, it exhibits a dipole moment. As a result, the identification of the exterior atom determines whether the molecule is polar or non-polar.

Learn more:

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Answer:

0.02kg

Explanation:

Given parameters:

Amount of heat  = 5200J

Unknown:

Mass of ice that would be melted at 0°C = ?

Solution:

To solve this problem, use the expression below;

        H  = mL

H is the heat

m is the mass

L is the latent heat of fusion of ice  =  3.33 x 10⁵ J/kg.

 Insert the parameters and solve for m;

           5200  = m x 3.3 x 10⁵

             m  = [tex]\frac{5200}{3.33 x 10^{5} }[/tex]   = 0.02kg

Answer:

Mass of water produced= 1.8 g

Explanation:

Given data:

Mass of water produced = ?

Mass of butane = 1.36 g

Mass of oxygen = excess

Solution:

Chemical equation:

2C₄H₁₀ +13 O₂       →   8CO₂ + 10H₂O

Number of moles of butane:

Number of moles = mass/molar mass

Number of moles = 1.36 g/ 58.12 g/mol

Number of moles = 0.02 mol

Now we will compare the moles of butane with water.

                 C₄H₁₀         :        H₂O

                  2              :           10

                 0.02          :         10/2×0.02 = 0.1 mol

Mass of water produced:

Mass = molar mass × molar mass

Mass = 0.1 mol × 18 g/mol

Mass = 1.8 g

Answer:

Solids have a defined shape and volume.

Liquids have a definite volume but can take the shape of a container.

Gas has no definite volume or shape.

Answer:

See Explanation for more details...

Explanation:

Solid: defined form, minimal potential energy, it is not compressible, defined mass.

Liquid: No defined form, has more potential energy than the solids, it is not compressible, defined mass.

Gas: No defined form, high potential energy, it is compressible, defined mass.

Answer:

Approx. 0.1126 mol

Answer:

ocean

Explanation:

We are given:

Mass of the tablet  = 2.7 grams

Number of moles of Ascorbic acid present in the tablet = 0.0109 moles

Molar mass of Ascorbic acid = 176.12 g/mol

Mass of Ascorbic Acid present in the tablet:

Mass of a given number of moles  = number of moles * molar mass

replacing the variables

Mass = 0.0109 * 176.12

Mass = 1.92 grams (approx)

Mass percent of Ascorbic acid:

Mass% = ([tex]\frac{Mass of Ascorbic Acid}{Mass of the Tablet}[/tex]) * 100

replacing the variables

Mass% = (1.92 / 2.7) * 100

Mass% = 192 / 2.7

Mass% = 71.12 %

Therefore, the tablet has 71.12% Ascorbic Acid by mass

Answer:

71.1

to 3 sig figs

Explanation:

from Khan Academy

Answer:

Explanation:

Group 1 elements have a single electron (called the valence electron) in there outermost shell. Reactivity of group 1 elements (alkali metals) increases down a group; this is because as one moves down the group, the atomic radius increases thus causing the outermost electron/valence electron to be found further away from the nucleus, which makes it (the electron) to be easily lost due to weaker force of attraction between the single valence electron and the central nucleus.

However, in the case of group 7/halogen elements, as one moves down the group, the atomic radius also increases, but the reactivity reduces. This is because as one moves down the group and the atomic radius increases, the nucleus ability to attract an electron lowers, because of the increased number of electrons that shields against the pull of the nucleus (this is referred to as nuclear shielding). This is the reason fluorine is the most reactive halogen.

Answer:

1.62 L

Explanation:

T= 97+273.15= 370.15

R= 0.08206 atm/mol⋅K

V= 45 L

n= 2.4 mol

P= (n⋅R⋅T)/V

= (2.4 x 0.08206 x 370.15)/(45) = 1.61997 = 1.62

The pressure of the gas is 1.62 atm. This can be calculated by using ideal gas law that gives direct relation between P,V and T

This law states that pressure and volume are directly proportional to the temperature of the gas.

What information do we have?

T= 97+273.15= 370.15 K

R= 0.08206 atm/mol⋅K

V= 45 L

n= 2.4 mol

To find:

P=?

Ideal gas law is given by:

PV=n.R.T

P= (n⋅R⋅T)/V

P= (2.4 x 0.08206 x 370.15)/(45)

P= 1.61997

P= 1.62 atm

Thus, the pressure of the gas is 1.62 atm.

Find more information about Ideal gas law here:

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The final volume : 3.4 L

Charles's Law  

When the gas pressure is kept constant, the gas volume is proportional to the temperature  

[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]

V₁=3300 ml

T₁=63 + 273=336 K

T₂=78+273=351 K

the final volume :

[tex]\tt V_2=\dfrac{V_1.T_2}{T_1}\\\\V_2=\dfrac{3300\times 351}{336}\\\\V_2=3447.3~ml\rightarrow 2~sig.~fig.\rightarrow 3.4~L[/tex]

Answer:

c turns back when iodine is added result indicated a chemical reaction

Answer:

Explanation:

The instantaneous speed is the speed of an object at a particular moment in time. And if you include the direction with that speed, you get the instantaneous velocity.

Answer:

neutrons are inside the nucleus

Explanation:

The most significant contribution that added to Rutherford's discovery of a positive nucleus is that neutrons are also inside the nucleus.