Dissolve 30 g of sodium sulphate into 300 mL of water
determine the number of moles of sodium sulphate in the solution

Answer:

Gold, Platinum, Silver, Ruthenium

Answer: 163.6g H2O

Explanation:

The balanced chemical equation for the combustion of propane is:

C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g)

This means 1 molecule of C3H8 react with 5 molecules of O2 to produce 3 molecules of CO2 and 4 molecules of H2O.

Molar mass C3H8 = 44 g/mol
According to the stochiometric coefficients 1 mol C3H8 will form 4H2O

100g C3H8 to mol = 100 g / 44 g/mol = 2.273 mol
This will produce 2.273*4 H2O = 9.09 mol H2O

Molar mass H2O = 18 g/mol
Mass of 9.09 mol H2O = 9.09 mol * 18 g/mol = 163.6 g H2O

Therefore, 163.6g of H2O will be formed from the combustion of 100g of C3H8

Answer:

two unpaired electrons

Explanation:

each of which are located in a different pi* antibounding orbital.

Answer:

-Growth of plants on the rock.

-Temperature and pressure changes in nature.

-Freezing and thawing of water in cracks of the rock.

-Formation of salt crystals within the rock.

-Burrowing by animals.

those are some factors I know

hope this helped you

Answer:

3

Explanation:

Important concept! The little number after an element represents the number of atoms in the substance. Eg. SF6. The 6 after the F tell us that there are 6 atoms of Fluorine in SF6. The coefficient or big number before a substance tells us how many of that substance there is in the equation. TO find the number of atoms in a substance with a coefficient we simply multiply the coefficient by the subscript or small number. Eg. 4SF6. The number of fluorine atoms in 4SF6 can be found my multiplying 4 and 6. 4 * 6 = 24 so there are 24 atoms of fluorine in 4SF6

Balancing the equation!

First lets list the number of atoms of each element on each side so we can see what we need to balance

SF6 + SO3 --> O2SF2

               2  S   1

               6  F  2

               3  O  2

First lets balance the number of oxygen atoms. We can do this by adding a coefficient of 2 to SO3 and a 3 to O2SF2. After doing so lets count the number of atoms of each element again as some of them may have changed.

SF6 + 2SO3 --> 3O2SF2

                3  S   3

                6  F  6

                6  O  6                

It appears that the each element in the reaction is now balanced after adding a 2 to SO3 and a 3 to O2SF2 so the equation is now balanced.

The answer would be 3 as 3 was added to O2SF2 to balance the reaction.

The equilibrium pressure of NO is 2.14 atm.

The equilibrium constant is a numerical value that shows the extent to which reactants are converted into products. We have the reaction  2NO₂(g) ⇌ 2 NO(g) + O₂(g).

We have to set up the ICE table

From PV = nRT

P = nRT/V = 4 * 0.082 * 473/2.5 = 62 atm

          2NO₂(g) ⇌ 2 NO(g) + O₂(g)

I          62                 0            0

C         -x                +2x           +x  

E        62 - x           2x               x

Kp = pNO^2 * pO2/pNO2^2

1.11 × 10⁻⁵ = (2x)^2 (x)/(62 - x)^2

1.11 × 10⁻⁵(62 - x)^2 = 4x^3

1.11 × 10⁻⁵(3844 - 124 + x^2) = 4x^3

0.04 - 0.0014x +  1.11 × 10⁻⁵x^2 = 4x^3

4x^3 -  1.11 × 10⁻⁵x^2 +  0.0014x - 0.04 = 0

x = 0.107  atm

Since;

pNO = 2x = 2(0.107) = 2.14 atm

The equilibrium pressure of NO is 2.14 atm.

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Answer:

11.3%

Explanation:

The stock market’s average annual return through history is 11.3%, which is more than most savings accounts pay.

Answer:

Explanation:

Hope this helps

Answer:

the answer is 5

Explanation:

if you add 5% divided by 3 = 15%.

So if you add all of those plus the 30% you will be getting 45%.

Answer:

i believe its the role of the antagonist

Explanation:

Answer:

dont know but i went to the store td and i bought some food then after i ate it i had to use the bathroom n i fell on my way there and  it hurt

Explanation:

(Many social behaviors of animals are adaptive, meaning that being social ultimately increases an animal's fitness — its lifetime reproductive success. One example of how social behavior is adaptive is aggregation against predators.)

Answer:

frequency of the wave f=4 Hz

Answer:

  The purpose of this guide is to help you write a clear and concise report that summarizes the lab I just completed.  This lab showed me how water carries rocks to a new location. For instance how the first model showed how a stream would act with light drizzle to downpour as I saw the outcomes were all if not completely then partially different  

            I read the information that was given to me before I started each lab lesson and went on from there.

Explanation:

:)

Answer:

Any device that contains electronic parts

Answer: The members of homologous series are

HCHO,CH3CHO,C2H5CHO,C3H7CHO .

The members of the homologous series containing -CHO as a functional group is HCHO,CH₃CHO,C₂H₅CHO,C₃H₇CHO .

Functional group is defined as a substituent or group of toms or an atom which causes chemical reactions.Each functional group will react similarly regardless to the parent carbon chain to which it is attached.This helps in prediction of chemical reactions.

The reactivity of functional group can be enhanced by making modifications in the functional group .Atoms present in functional groups are linked to each other by means of covalent bonds.They are named along with organic compounds according to IUPAC nomenclature.

Functional group inter conversion is also possible by retro -synthesis.In some cases , functional groups can be charged molecules.

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The standard for chromium VI in a sample is 0.1 milligrams per liter (mg/l) or 100 parts per billion (ppb).

EPA is an acronym that stands for Environmental Protection Agency. The major concern of the agency is to ensure that the level of contaminants released into the environment does not exceed the set standards.

The standard for chromium VI in a sample is 0.1 milligrams per liter (mg/l) or 100 parts per billion (ppb), Since the question is incomplete, we can't ascertain if the chromium (VI) concentration exceeds this standard.

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The molar mass of the element M is mathematically given as

M=91.927g/mol

Question Parameters:

A 35.3 g of element M is reacted with nitrogen to produce 43.5 g of compound M3N2.

Generally, the equation for the Chemical Reaction  is mathematically given as

3M+N2=M3N2

Therefore

moles of N2 is given as

[tex]m=\frac{mass of N2}{molar mass}[/tex]

Where

mass of N2=43.5-35.3

mass of N2=8.2

Therefore

[tex]m=\frac{8.2}{32}[/tex]

m=0.25625mole

Since 2 moles of N2 reacts with 3mols of M

Hence, 0.25625 mole of N2 reacts with 3mole of M

x=3/2*0.256

x=0.384mol

In conclusion, the molar mass of M

[tex]M=\frac{mass of x}{moles of x}\\\\M=\frac{35.3}{0.384}[/tex]

M=91.927g/mol

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The polarity of HBrO2 is greater than that of HBrO hence HBrO2  is a stronger acid than HBrO .

According to the Arrhenius definition, an acid is any sustenance that produces hydrogen ions as the only positive ion in solution. In both molecules we can see that hydrogen is bonded to electronegative oxygen atoms.

The bond is more polar in HBrO2 and as a result of this, the molecule, HBrO2 is a stronger acid than HBrO.

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The measure of the sum of the interior angles of a convex polygon with n sides is given by [tex]S=(n-2)180[/tex]

A polygon can be defined as a two-dimensional geometric figure that consists of straight line segments and finite number of sides.

A quadrilateral can be defined as a type of polygon that is made up of four (4) sides, four (4) vertices, four (4) edges and four (4) angles.

Mathematically, the measure of the sum of the interior angles of a convex polygon with n sides is given by:

[tex]S=(n-2)180[/tex]

In Geometry, the measure of the sum of the angles of a convex quadrilateral, pentagon, and a nonagon is equal to 360 degrees.

For a regular polygon:

Mathematically, the measure of an interior angle with n sides is given by;

[tex]A=(2n-4)90[/tex]

For a regular octagon:

Mathematically, the measure of an interior angle is equal to 135 degrees.

Lastly, the sum of the measure of the exterior angles, one at each vertex of a convex polygon is equal to 360 degrees.

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Answer:

0.44604005953260284 moles

Explanation:

or you could round it to 0.446 moles

mol CO₂ = mass : molar mass CO₂

mol CO₂ = 19.63 : 44 g/mol = 0.446

Answer:

the difference between model A and model B is the fact that model A has more atoms in it, and they are smaller and all the same type while model B has less atoms, they are bigger and there are different types of atoms.

Explanation:

mr clean

Answer:

0.032 mole

Explanation:

Please mark me as brainliest

Answer:

Balanced reaction:

3 H2 (g)  + N2 (g)  → 2 NH3 (g)

Use stoichiometry to convert g of H2 to g of NH3.  The process would be:

g H2 → mol H2 → mol NH3 → g NH3

12.0 g H2 x (1 mol H2 / 2.02 g H2) x (2 mol NH3 / 3 mol H2) x (17.03 g NH3 / 1 mol NH3) = 67.4 g NH3

Explanation: See above

Hope this helps, friend.

With a Ksp of 4.30*10−11 and a molar mass of 274 g / mol the solubility (in g / L) of the generic salt is mathematically given as

S=0.0604g/l

Generally, the Ksp   is mathematically given as

Ksp=4s^3

Therefore

s=(\frac{4.30 × 10−11}{4})^{1/3}

s=2.207×10^{−4]

In conclusion, solubility is

S=2.207×10^{−4]*274

S=0.0604g/l

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[tex]\Large \text{1)}[/tex]

[tex]\textbf{Use the formula and substitute the values}[/tex]

[tex]\displaystyle 0.3\ mol/L = \frac{n \ mol}{10 \times 10^{-3}\ L}[/tex]

[tex]\textbf{Solve for the number of moles}[/tex]

[tex]n = 0.003\ mol[/tex]

[tex]\textbf{Calculate final volume }[/tex]

[tex]40+10=50\ mL[/tex]

[tex]\textbf{Number of moles remains same. Solve for concentration}[/tex]

[tex]\displaystyle C=\frac{0.003\ mol}{50 \times 10^{-3}\ L} =0.06\ mol/L[/tex]

[tex]\Large \text{2)}[/tex]

[tex]\displaystyle DF=\frac{V_f}{V_i}[/tex]

[tex]\displaystyle DF=\frac{50}{10}=5[/tex]

The quantity of heat required to convert the ice to water is 5048.4 J.

The quantity of heat required to convert the ice to water is calculated as follows;

Q = n∆Hfus

where;

The number of moles of the ice is calculated as follows;

n = m/M

where;

M is molar mass of water (H2O) = 18 g/mol

n = 15.1/18

n = 0.84 mole

Q = 0.84 x 6.01 x 10³

Q = 5048.4 J

Thus, the quantity of heat required to convert the ice to water is 5048.4 J.

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The energy in a single Carbon - Hydrogen (C-H) bond of methane is 413 kJ

From the question, we are to determine the Carbon - Hydrogen bond energy in methane

From the given information,

The total bond energy in a molecule of methane is 1652 kJ

C-H bond energy = [tex]\frac{Total\ bond\ energy\ in\ methane}{number\ of \ C-H \ bonds}[/tex]

Number of C-H bonds in methane = 4

Therefore,

C-H bond energy = [tex]\frac{1652}{4}[/tex]

C-H bond energy = 413 kJ

Hence, the energy in a single Carbon - Hydrogen (C-H) bond of methane is 413 kJ

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