Cuál es la importancia de una fórmula química y explique las clases de fórmulas con sus ejemplos respectivos.

Answer:

It is used to prevent rusting and corrosion on steel and iron. It is also used for batteries

Explanation:

It is used to prevent rusting and corrosion on steel and iron. It is also used for batteries

Answer:

18.368 Liters

Explanation:

Given that balanced Acetone oxidation,

= C3H6O + 4O2 = 3CO2 + 3H2O

lets assume volume of acetone = 1 liter

mass of acetone =  50 mg

number of moles present = (5*10^-3)g / ( 58.08 ) = 0.0000861 mol

Given that : I mol of ( acetone ) = 4 mol of oxygen

∴0.0000861 mol of acetone = 0.0003444 mol of oxygen

also note that the ratio of air to oxygen is

0.21 mol of oxygen  = 1 mol of air

∴ 0.0003444 mol of oxygen  =  0.00164 mol of air      (0.0003444 / 0.21 )

note : 1 mol at STP = 22.4 L     (at STP = Temperature = O°C

Finally the theoretically oxygen demand in liters of air for a 50 mg/L of acetone to decompose

Given that Acetone decompose/degrade completely between 500°C - 600°

we will take 500°  for the sake of this calculation

The oxygen demand in liters will be

=  22.4 * 0.00164 * 500 = 18.368 Liters

The theoretical oxygen demand in liters of air for a 50 mg / L acetone solution, to decompose completely is 18.368 Liters.

Moles of any substance will be calculated as:

n = W/M, where

W = given mass

M = molar mass

Given chemical reaction is:

CH₃COCH₃ + 4O₂ → 3CO₂ + 3H₂O

Given mass of acetone = 50mg = 0.05g

Moles of acetone = 0.05g / 58.08g/mol = 0.0000861 mole

From the stoichiometry of the reaction, it is clear that:

1 mole of CH₃COCH₃ = 4 moles of O₂

0.0000861 mole of CH₃COCH₃ = 4×0.0000861=0.0003444 moles of O₂

We know that ratio of air is:

0.21 mole of oxygen present = in 1 mole of air

0.0003444 mole of oxygen present = in 0.0003444/0.21=0.00164 mole of air

At STP 1 mole of gas is present in 22.4 Liter.

Degradation of acetone takes place in 500°C - 600°C.

Theoretical oxygen demand = 22.4×0.00164×500 = 18.368 Liters

Hence, theoretical oxygen demand is 18.368 Liters.

To know more about theoretical oxygen demand, visit the below link:

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The rocks are classified as igneous, metamorphic, and sedimentary use the formation for classification purposes.

The outermost of them, called the crust, is composed of three types of rocks: magmatic, sedimentary and metamorphic. They are defined through the origin of several minerals and can be characterized with chemical composition, texture or shape, but the most used specification is based on composition.

The property does Valerie use for classification purposes is formation.

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Answer:

the frist one is balance

by the side of reactant is

C=8

O=8

H2=17×2=34

from the product side

C=8

O=8×1=8

H2=18+(8×2)=34

and they are balance

the second one is

the reactant side

Fe=4

S=4

O2=7×2=14

the product side of the chemical equation

Fe=3×2=6

S=4

O=(4×2)+(3×3)=6+9=15

it is not balance.

#THE FRIST ONE IS BALANCE.

#THE SECOND ONE IS NOT BALANCE.

Answer:

c

Explanation:

37Ca and 53Fe have the same decay mode.

Three of the most common types of decay are alpha decay (α-decay), beta decay (β-decay), and gamma decay (γ-decay), all of which involve emitting one or more particles.

The most likely mode of decay for a neutron-rich nucleus is one that converts a neutron into a proton. Every neutron-rich radioactive isotope with an atomic number smaller than 83 decays by electron emission. C, 32P, and 35S, for example, are all neutron-rich nuclei that decay by the emission of an electron.

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Answer:

Molarity of a solution where one mole of NaOH is added to 2000mL of water is 0.0005

Explanation:

Molarity is the equal to number of moles of solute divided by total volume of solvent

Given -

Number of moles of solute i.e  NaOH = 1

Total volume of solvent i.e water = 2000 mL

Molarity [tex]\frac{1}{2000} = 0.0005[/tex]

Answer:

CII + 4 e- → C-II   (reduction)

4 H0 - 4 e- → 4 HI   (oxidation)

Explanation:

Answer:

The correct answer should be:

[blank] CO + [2] H2  =>  [blank] CH3OH
or

CO + [2] H2  =>  CH3OH

Answer:

The pressure of the gas would be 3.06 atm

Explanation:

Amonton's law states that the pressure is directly proportional to the absolute temperature of a gas under constant volume. The equation is:

P1 / T1 = P2 / T2

Where P1 is the initial pressure = 3.16atm

T1 is initial absolute temperature = 273.15 + 32.2°C = 305.35K

P2 is our incognite

And T2 is = 273.15 + 22.9°C = 296.05K

Replacing:

3.16atm / 305.35K = P2 / 296.05K

3.06 atm = P2

Answer:

7.17

Explanation:

convert 5.50g to moles of salicylic acid. Then use mole ratios and convert the moles of salicylic acid to moles of Asprin(mole ratio is 1:1). Then convert the moles to grams using the molar mass of asprin.

Answer:

kkajqjjqjqjnqnqnqjqjq

Answer:

1750

Explanation:

Greenhouse gases are those gases that are believed to contribute to the rise in the temperature of the earth by trapping infrared rays close to the surface of the earth.

Prominent among the greenhouse gases are; N2O, methane and CO2.

From the chart, we can see that the lowest sum of concentration of greenhouse gases measured in ppm was obtained in 1750. Thus this period  shows the lowest composition of greenhouse gases.

Answer:

47.596008

Explanation:

Answer:

I'm pretty sure it's only 5, because once you've used up all 5 marshmallows, you can't make any more s'mores. Unless just graham crackers and chocolate counts as a s'more...

:)

Answer:

b. ph is greatet than 7

Explanation:

ph=7 neutral

ph=7-14 basicity as you go up increase basicity

ph=0-7 acodity as you go down increasing acidity

Answer:

Protons are the positive parts in an atom, they are positively charged and they are located in the nucleus of an atom..

Explanation:

prolly not the best explanation but hope it helps <3

salt is not because it gets u dehydrated

Answer:

(a) 0.294 mol silver = [tex]1.770 * 10^{23}[/tex]  

(b) 8.98 * 10-3 mol sodium chloride - [tex]5.407 *10^{23}[/tex]  

(c) 23.3 mol carbon dioxide  = [tex]1.403 * 10^{25}[/tex]

(d) 0.310 mol nitrogen (N2) = [tex]1.866 * 10^{23}[/tex]

Explanation:

In one mole there are [tex]6.022 * 10^{23}[/tex] atoms/molecules

(a) 0.294 mol silver = [tex]6.022 * 10^{23} * 0.294 = 1.770 * 10^{23}[/tex]  

(b) 8.98 * 10-3 mol sodium chloride - [tex]5.407 *10^{23}[/tex]  

(c) 23.3 mol carbon dioxide  = [tex]23.3 * 6.022 * 10^{23} = 1.403 * 10^{25}[/tex]

(d) 0.310 mol nitrogen (N2) = [tex]0.310 * 6.022 * 10^{23} = 1.866 * 10^{23}[/tex]

Answer:

C

Explanation:

Answer:

9.91 mL

Explanation:

Using the combined gas law equation as follows;

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure (torr)

P2 = final pressure (torr)

V1 = initial volume (mL)

V2 = final volume (mL)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information provided in this question;

V1 = 15.0mL

V2 = ?

P1 = 760 torr

P2 = 1252 torr

T1 = 10°C = 10 + 273 = 283K

T2 = 35°C = 35 + 273 = 308K

Using P1V1/T1 = P2V2/T2

760 × 15/283 = 1252 × V2/308

11400/283 = 1252V2/308

Cross multiply

11400 × 308 = 283 × 1252V2

3511200 = 354316V2

V2 = 3511200 ÷ 354316

V2 = 9.91 mL

Answer:

its 4

Explanation:

Answer:

El limon por su alto contenido en ácido cítrico, actúa como un excelente limpiador natural debido a su bajo pH y propiedades antibacterianas. A parte de todas estas propiedades, los limones huelen muy bien y es una rareza que pudiesen manchar o dañar algún material de la casa.

Explanation:

Answer:

It's the citric acid reacting to the iron oxide -which is basically the rust- it dissolves.

Explanation:

Answer:

166.04g

Explanation:

Mass=Moles xRMM

1 mole = 6.023 x10^23molecules

5.0 x10^25molecules

=83.02moles

RMM=2

mass=83.02 x2

and=166.04g

Answer:

I think Sr I think so maybe

Answer:

here is your answer

Cellulase and proteases are two enzymes are used for making alcohol

hope it helps you

Explanation:

pwlss giv meh brainless

Materials that are good conductors of thermal energy are called thermal conductors. Metals are especially good thermal conductors because they have freely moving electrons that can transfer thermal energy quickly and easily

Answer:

Explanation:

Materials that are good conductors of thermal energy are called thermal conductors. Metals are especially good thermal conductors because they have freely moving electrons that can transfer thermal energy quickly and easily.1

Answer:

Yes, it is

Explanation:

Silicon (IV) oxide, commonly known as silica is a substance that majorly constitutes SAND. It has the chemical formula, SiO2, which contains a combination of silicon and oxygen.

The IUPAC name of SiO2 is Silicon IV oxide, which can also be referred to as Silicon dioxide because the structure the compound contains two (-di) oxygen atoms. Hence, based on the question, silicon(IV) oxide is the same as silicon dioxide.

Answer:

15.142338 mol/kg

Explanation:

(1 mole) / (66.04 grams)