The mole fraction of NaCl in an
aqueous solution is 0.132. What is
the weight/weight percent of NaCl in
this solution?
Molar Mass
NaCl: 58.44 g/mol
H20: 18.016 g/mol
Hint: Remember to give your answer as a percent!

Answer: 3 4 a noodles

Explanation: just is[tex]\lim_{n \to \infty} a_n \lim_{n \to \infty} a_n \lim_{n \to \infty} a_n \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \sqrt{x} x^{2} x^{2}[/tex]

Answer:

See explanation and images attached

Explanation:

There are two compounds that could have molecular formula of C2H6O, they are ethanol and methoxy methane (trivial name: methyl ether).  The structures of the two compounds are shown in the image attached as obtained from quora.

The boiling point of methoxymethane is -24.8°C  while that of ethanol is about 78.5°C. The reason for the high boiling point of ethanol is the presence of intermolecular hydrogen bonding leading to a stronger intermolecular interaction compared to methoxymethane molecules held together only by very weak dispersion forces.

The Lewis structures of ethanol and methoxymethane are attached below.

Ethanol (C₂H₆O) and methoxymethane (CH₃OCH₃) are both organic compounds, but they have different molecular structures and intermolecular forces, which can affect their boiling points.

Due to the presence of hydrogen bonding in ethanol, its boiling point is significantly higher compared to methoxymethane. The boiling point of ethanol is around 78.3°C (173°F), while the boiling point of methoxymethane is approximately -24.8°C (-12.6°F). The difference in boiling points arises from the stronger intermolecular forces, namely hydrogen bonding, present in ethanol.

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Answer:

C) There are fewer particles in the balloons than were in the cylinder.

Explanation:

Hope this helps good luck!- Angel

Answer:rocks

Explanation:

Answer:

See explanation

Explanation:

2)CH4 + 2O2 -------> CO2 + 2H2O

96g of O2 = 96g/32g/mol = 3 moles of O2

If 1 mole of CH4 reacts with 2 moles of O2

x moles of CH4 reacts with 3 Moles of O2

x = 3/2 = 1.5 moles of CH4

Mass of CH4 = 1.5 moles * 16 = 24 g of CH4

3)C6H6 + HNO3 ---->C6H5NO2 + H2

Number of moles in 15 g of benzene = 15 g/ 78 g/mol = 0.19 moles

Number of moles of 18 g of  C6H5NO2 = 18g/123 g/mol = 0.15 moles

From the reaction equation;

1 mole of C6H6 yields 1 mole of C6H5NO2

Hence 0.19 moles of C6H6 also yields 0.19 moles of C6H5NO2

% yield = actual yield/ theoretical yield * 100

actual yield = 0.15 moles

Theoretical yield = 0.19 moles

% yield = 0.15/0.19 * 100

% yield = 78.9%

4)The reaction equation is

KOH + CH3COOH ------> CH3COOK + H2O

number of moles of acetic acid reacted = 0.215g/60 g/mol = 3.58 * 10^-3 moles

Since the reaction is 1:1, 3.58 * 10^-3 moles moles of KOH is used.

But;

n = CV

n = number of moles

C = concentration of reactants

V = volume of solution

V = n/C

V= 3.58 * 10^-3 moles/0.225M = 0.016 L

5) 3AgNO3 + AlCl3 -----> Al(NO3) + 3AgCl

Number of moles in 0.325 g of AgCl = 0.325g/143 g/mol = 2.27 * 10^-3 moles

From the reaction equation;

1 mole of AlCl3 yields 3 moles of AgCl

x moles of AlCl3 yields 2.27 * 10^-3 moles of AgCl

x = 2.27 * 10^-3 moles/3

x = 7.6 * 10^-4 moles

From;

n = CV

C = n/V

C = 7.6 * 10^-4 moles * 1000/185.5

C= 4.1 * 10^-3 MolL-1

6)From;

C1V1 =C2V2

Where;

C1 = initial concentration

V1= initial volume

C2= final concentration

V2= final volume

100 * 12 = 4.75 * V2

V2 = 100 * 12/4.75

V2 = 252.6 ml

Volume of water added = 252.6 - 100 = 152.6 ml of pure water

The mole fraction of KCl = 0.105

Given

%w/w KCl = 32.7

Required

the mole fraction of KCI

Solution

For 100 g solution : KCl = 32.7 g, H₂O = 67.3 g

mol KCl :

[tex]\tt \dfrac{32.7}{74.55~g/mol}=0.439[/tex]

mol H₂O :

[tex]\tt \dfrac{67.3}{18.016}=3.74[/tex]

total mol of solution = 0.439+3.74=4.179

mol fraction of KCl :

[tex]\tt \dfrac{0.439}{4.179}=0.105[/tex]

Answer:

32.7

Explanation:

Answer:

b

Explanation:

wave transfers energy from one place to another

Answer: In physics, potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.

Explanation:

Answer:element symbol

Explanation:

An element symbol is the one or two letter sequence to at identifies an element, typically used through the periodic table

Symbols are abbreviations used in chemistry for chemical elements, functional groups and chemical compounds.

example:

H, Cl ,N , Ne etc.

Answer:

Endothermic reaction

Explanation:

A cold pack is used as a cold compress in order to numb pain caused by minor injuries. it is useful in first aid treatment of bruises, sprains, cuts and burns in addition to the application of a bandage.

A cold pack functions by absorbing heat away from the surrounding thereby decreasing the temperature and making the surface to feel cool. This is an endothermic reaction.

In an endothermic reaction, heat is absorbed from the environment and the reaction surface feels cool. Hence, an endothermic reaction is most useful in making a cold pack because the product of the endothermic reaction will feel cool to touch making it suitable to be used as a cold pack in first aid.

Answer:  In two molecules of carbon dioxide (2CO2), there are _____.

two atoms of carbon

four atoms of oxygen

Answer:

.................................................................                                                                           :3

Explanation:

Answer:

I think it's sedimentation

To solve such this we must know the concept of chemical reaction. Therefore, the correct option is option C. Sedimentation is the process which is responsible for causing this column of rock to form.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved.

There are so many types of chemical reaction reaction like combination reaction, double displacement reaction. Among all the given processes, sedimentation is the process which is responsible for causing this column of rock to form. Weathering is erosion upper layer of soil.

Therefore, the correct option is option C.

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Answer:

When an electric current is passed through liquid water (H2O), it changes the water into two gases—hydrogen and oxygen. The molecules of water break apart into individual atoms.

hope this helps

Answer:

c

Explanation:

Gas change and climate change are very similar and thats why its c

Answer:

C

Explanation:

Answer:

no he don't have to be adopted he just different from his parents

Answer:

Did you get the answer to this?

Explanation:

I need this too.

Answer:

The worldly answer is 42

Explanation:

there you go

Answer: In standard decimal notation, the speed of light is 299,800,000.0 meters per second. In scientific notation this is written as 2.998x108 meters per second, meaning that the true position of the decimal point is 8 digits to the right. In this case, that means filling in the empty spots with zeros.

Hope it helped

Answer:

The answer is Catalytic

Answer:

Ok:

Explanation:

So, you can use the Henderson-Hasselbalch equation for this:

pH = pKa + log([tex]A^-/HA[/tex]) where A- is the conjugate base of the acid. In other words, A- is the deprotonated form and HA is the protonated.

We can solve that

1 = log([tex]A^-/HA\\[/tex]) and so 10 = [tex]A^-/HA[/tex] or 10HA = A-.  For every 1 protonated form of adenosine (HA), there are 10 A-. So, the percent in the protonated form will be 1(1+10) or 1/11 which is close to 9 percent.

Nucleoside is "a structural subunit of nucleic acids, the heredity-controlling components of all living cells, consisting of a molecule of sugar linked to a nitrogen-containing organic compound".

Nucleic acids are "naturally occurring chemical compounds that serve as the primary information-carrying molecules in cells".

Nitrogen is "an essential element for all forms of life and is the structural component of amino acids from which animal and human tissues, enzymes, and many hormones are made".

Organic compound is "any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen".

Using Henderson-Hasselbalch equation

pH = pKa + log(A⁻/HA)

where pH is the concentration of [H⁺]

           pKa is the acid dissociation constant and [A⁻] and [HA] are the concentrations of conjugate base and an acid.

1 = log (A⁻/HA)

Thus, 10 = A⁻/HA

10HA = A⁻ Each protonated form of adenosine (HA) contains 10 A⁻

Hence, the percentage of the protonated form at pH 4.8 will be 1(1+10) or 1/11 which is closer to 9 percent.

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Answer:        HHHHHHHHHHHHHHHHHHHHHHAHAHHAHAHHAHHAHHAHHAHHAHAHAHHHAHAHAHHAHAHHA

DON"T KNOW?

Explanation:

Answer:

1.16 mol

Explanation:

Given data:

Mass in gram Mg(OH)₂ = 68 g

Number of moles of Mg(OH)₂ = ?

Solution:

Formula:

Number of moles = mass/molar mass

Molar mass of Mg(OH)₂ = 58.32 g/mol

By putting values,

Number of moles = 68 g/ 58.32 g/mol

Number of moles = 1.16 mol

Answer:

It is known generally that polar compounds are soluble in polar solvents. Based on the structure of benzoic acid, it comprises the non-polar C6H6 group and polar COOH group. Based on the structure, in benzoic acid, the nonpolar hydrocarbon outweighs and influences the polar part as nonpolar, due to which benzoic acid is not soluble in water.

On the other hand, benzoic acid produces sodium salt benzoic acid when it reacts with 2.5 M sodium hydroxide, this salt is ionic. Generally, the ionic compounds are soluble in water. Therefore, the salt of benzoic acid gets dissolved in water. Hence, benzoic acid is soluble in the solution of sodium hydroxide.

Answer:

The elements toward the bottom left corner of the periodic table are the metals that are the most active in the sense of being the most reactive. Lithium, sodium, and potassium all react with water, for example.

Explanation:

Answer:

PLZZ like it tuk me to long to explan

Explanation:

The reaction between zinc and sulfur can be shown in what is called a chemical equation .  In words, we could write the reaction as:

zinc + sulfur → zinc sulfide

The more convenient way to express a chemical reaction is to use the symbols and formulas of the substances involved:

Zn + S → ZnS

The substance(s) to the left of the arrow in a chemical equation are called reactants.  A reactant is a substance that is present at the start of a chemical reaction.  The substance(s) to the right of the arrow are called products .  A product is a substance that is present at the end of a chemical reaction.  In the equation above, the zinc and sulfur are the reactants that chemically combine to form the zinc sulfide product.

There is a standard way of writing chemical equations.  The reactants are all written on the left-hand side of the equation, with the products on the right-hand side.  An arrow points from the reactants to the products to indicate the direction of the reaction:

reactants → products

When appropriate, a symbol may be written above or below the arrow to indicate some special circumstance.  The symbol “Δ” is often used to indicate that the reaction is to be heated.

The presence of the arrow also indicates that the reaction goes in one direction under the conditions indicated.  There are reactions which can be easily reversed, but we will not take those up right now.

There are a wide variety of reactions possible: elements may form compounds (as seen in the reaction above), compounds may form elements (water will break down in the presence of an electric current to form hydrogen gas and oxygen gas) or compounds may combine, break apart, or rearrange to form new materials.

Answer:

= - 59.7 kJ/mol

Explanation:

From the given information:

no of moles of AgNO3 = 100/1000 × 0.100 = 0.01 mol

no of moles of NaCl = 100/1000 × 0.200 = 0.02 mol

The total volume of the solution is:

= (100 + 100 ) mL

= 200 mL

mass of the solution = 200 × 1.00 = 200 g

Heat gained by the solution:

= mass × specific heat × temperature change in solution

= 200× 4.184 × (25.3 - 24.6)

= 585.76 J

Heat gained by calorimeter

= heat capacity × change in temperature of caiorimeter

= 15.5 × (25.3 -24.6)

= 10.85 J

Thus, total heat released = total heat gained

Q = 585.76 + 10.85 J

Q = 596.61 J

From above, it is obvious that AgNO3 is the limiting reagent

∴

ΔH_{rxn} = total heat released/ moles of AgNO3

= -596.61/0.01

= 59661 J/mol

= - 59.7 kJ/mol