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Contents Home Bookshelves Introductory, Conceptual, and GOB Chemistry Book: Introductory Chemistry Online! (Young) 9: The Gaseous State Expand/collapse global location

9.6: Combining STOICHIOMETRY and the Ideal Gas Laws

Last updatedAug 13, 2020

9.5: The Ideal Gas Law

9.S: The Gaseous State (Summary)

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With an understanding of the ideal gas laws, it is now possible to apply these principles to chemical stoichiometry problems. For example, zinc metal and hydrochloric acid (hydrogen CHLORIDE dissolved in water) react to form zinc (II) chloride and hydrogen gas according to the equation shown below:

2 HCl (aq) + Zn (s) → ZnCl2 (aq) + H2 (g)

Example 9.6.1 :

A sample of pure zinc with a mass of 5.98 g is reacted with excess hydrochloric acid and the (dry) hydrogen gas is collected at 25.0 ˚C and 742 mm Hg. What VOLUME of hydrogen gas would be produced?

Solution

This is a “single state” problem, so we can solve it using the ideal gas law, PV = nRT. In order to find the volume of hydrogen gas (V), we need to know the number of moles of hydrogen that will be produced by the reaction. Our stoichiometry is simply one mole of hydrogen per mole of zinc, so we need to know the number of moles of zinc that are present in 5.98 grams of zinc metal. The temperature is given in CENTIGRADE, so we need to convert into Kelvin, and we also need to convert mm Hg into atm.

Conversions:

25.0C+273=298K(9.6.1)

(742mmHg)×(1atm760mmHg)=0.976atm(9.6.2)

(5.98gZn)×(1.00mol65.39gZn)=0.0915mol(9.6.3)

Substituting:

PV=nRT(9.6.4)

(0.976atm)×V=(0.0915mol)(0.0821Latmmol−1K−1)(298K)(9.6.5)

V=(0.0915mol)(0.0821Latmmol−1K−1)(298K)(0.976atm)

ANSWER:

NaCIO

Explanation:

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Answer:

SOLIDS

Ionic COMPOUNDS typically are solids at room TEMPERATURE.

Answer:

18/8 stainless STEEL is nominally 18% chromium and 8% nickel, with the remainder being mainly iron; it does however also contain other elements, but at very low levels. It is also known as 302 or 304 grade stainless steel.

Answer:

molecular binding

Explanation:

because each ELEMENT of PERIODIC table have DIFFERENT different atomic number hence they have different SIZE n size of

ANSWER:

MUCH of a TIME ⏲️9oo is not the same THING.

Explanation:

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Explanation:

Mass of SOLUTE = 20 g

VOLUME of solution = 500 ml

Mass by volume percentage =

Volume of solution

Mass of solute×100

=

500

20×100

=4%

4×10= 40

HENCE the answer is 40%

ANSWER:

It was found that over a FAIRLY wide RANGE of temperature and pressure, CO2 dissociates into carbon monoxide and oxygen with no precipitation of carbon. At each total pressure, above a certain critical temperature, the carbon monoxide disproportionates and the DECOMPOSITION products are carbon oxygen.

ANSWER:

YES CO2 THERMALLY DECOMPOSES at 2400K.

Answer:

in this QUESTION answer is 2 upon MEIN 8 upon 3 is EQUALS to 3 II II the answer has 13 x 4 is equal to answer v KA answer 288 v cancer 3.2 last 2-3 ok this is the

Answer:

5.0 m i THINK so

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Answer:

Answer:Electricity is CONDUCTED through a solution only in the presence of particulate matter or IONS in them. These ions are CHARGED particles which move FREELY about in LIQUID solutions. Thus the ions in the solution are charged or excited when electricity passes through it

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Explanation:

given:

no of moles of HELIUM =17.5

To find :

no of INDIVIDUAL ATOMS of helium

Finding:

Number of moles of helium = no of individual atoms of helium/ avogadro number

Number of individual atoms of helium

= Number of moles of helium × avogadro number

= 17.5 × 6.022 × 10^23

= 105.385 × 10^23

= 1.05 × 10^25 atoms of helium

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ANSWER:

DOUBLE DISPLACEMENT REACTION

ANSWER:

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Answer:

The rule states that for a given ELECTRON configuration, the lowest energy term is the one with the greatest value of spin multiplicity. This implies that if TWO or more orbitals of equal energy are available, electrons will OCCUPY them SINGLY before filling them in pairs.

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ANSWER:

I dont know any THING sorry I just needed POINTS

ANSWER:

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ANSWER:

What is it you have to QUESTION PROPERLY PLEASE.

ANSWER:

EXPLANATION:

एल्कोहल (PURE ALCOHOL) को परिशुद्ध एल्कोहल (ABSOLUTE alcohol) कहते है। ... इस मेथिलीकृत एल्कोहल का उपयोग भी एल्कोहल के विकृतिकरण में किया जाता है। प्रश्न : CH3-OH निर्माण की औद्योगिक विधि में प्रयुक्त जल गैस या भाप अंगार गैस का मिश्रण दीजिये

ANSWER:

GENERAL SHERMAN TREE

<P>Explanation:

physicist Robert Boyle in 1662, states that the PRESSURE (p) of a given quantity of gas varies inversely with its VOLUME (v) at constant temperature; i.e., in EQUATION form, pv = k, a constant. ...

Answer:

sodium (Na) DONATED one ELECTRON to chlorine

here the sodium is positive because it LOST its electrons

chlorine is NEGATIVE because it gained electrons

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The prefix 'tri' is used to indicate NUMBER of ATOMS of an ELEMENT.

ANSWER:

In rural AREAS , the main OCCUPATION of PEOPLE is

Answer:

Solution

Rate of diffusion of methane

r1=Volume of METHAN eTime of dif fusion of methan e

=360cm315min=24cm3min−1

Molar mass of CH4(M1)=16gmol−1

Unknown GAS

Rate of diffusion of unknown gas

r2=Volume of unknown gasTime of dif fusion

=120cm310min=12cm3min−1

Molar mass of unknown gas (M2)=?

Acording of Graham's law of diffusion,

r1r2=M2M1−−−−√

24cm3min−112cm3min−1=M216gmol−2−−−−−−−−√

Squaring of both SIDES,

M2=24×24×1612×12=64

Molar mass of the unknown gas =64g.mol−1

Explanation:

ANSWER:

Here , GAS FORMED is HYDROGEN (H²)

Answer:

SALTS are ionic compounds which, when DISSOLVED in water, break up completely into ions. They arise by the reaction of acids with bases, and they always contain either a metal CATION or a cation derived from ammonium (NH4+). Examples of salts include NaCl, NH4F, MgCO3, and FE2(HPO4)3.

Vector, in PHYSICS, a quantity that has both magnitude and DIRECTION. ... It is typically represented by an arrow whose direction is the same as that of the quantity and whose length is PROPORTIONAL to the quantity's magnitude. Although a vector has magnitude .

OPEN SYSTEM.

<P>Explanation:

Here, V

1

=300CM

3

, T=27

∘

C=300K, P

1

=620mm

T

2

=47

∘

C=320K, P

2

=640mm

From Ideal gas equation,

T

1

P

1

V

1

=

T

2

P

2

V

2

⇒

300

620×300

=

320

640×V

2

V

2

=

640×300

620×300×320

=310 cm

3

.

Explanation:

hair DENSITY refers to how many strands of hair GROW per square inch of your scalp. Hair density is ONE factor that determines how to best style your hair. It's not NECESSARY to GET out a microscope and start counting individual strands

Answer:

(1) USING a precipitation REACTION to DETERMINE if the cation is a group 1 or group 2 metal, (2) performing a titration with silver NITRATE to determine the formula MASS of the salt, and (3) confirming the identity of the salt using a flame test.

Corrected question:

CH3-HC=N-CH3

Answer:

N methyl ethanimine

Explanation:

• FUNCTIONAL group used C=N is called imine.
• NAME the branch with more priority at first and add N to show it's directly attached to N then name the SECOND branch FOLLOWED by imine.

Answer:

1

Explanation:

SINCE only ONE SPECIE of MOLECULE is PARTICIPATING.

Explanation:

The ELECTRONIC configuration of Fe2+ is 1s2 2s2 2P6 3S2 3p6 3d6 and FE3+ is 1s2 2s2 2p6 3s2 3p6 3d5.

Answer:

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An electron withdrawing GROUP INCREASES the acidity carboxylic acid. It disperses negative charge by inductive/ RESONANCE effect and stabilizes the carboxylate ION. Thus, p-nitro benzoic acid (PKA 3.41) is more acidic than benzoic acid (pKa 4.19). Nitro group is electron withdrawing group.

Answer:

MEASUREMENT of X must YIELD a VALUE lying between −∞ and +∞, because the particle has to be located somewhere. It follows that Px∈−∞:∞=1, or ∫∞−∞|ψ(x,t)|2dx=1, which is generally known as the normalization condition for the wave function.

Answer:

Cyclohexane has the chemical formula of C6H12. It FORMS a RING, so there are no CH3 ends, instead each carbon is attached to a CH2. The simplest way to DRAW cyclohexane is simply draw a hexagon. ACCORDING to this format, each point depicts a fully saturated (with hydrogen atoms) carbon.

I THINK HIGHER is the ANSWER

Answer:

1) Ionic

2) Molecular

3) Ionic

4) Ionic

Explanation:

1. Since and and have electrostatic ATTRACTION between then it's an ionic solid.
2. SiC has a network because of covalent bonds and 4 electrons in Silicon's and Carbon's valence shell.

ANSWER:

ok

Explanation:

LEAD is your answer as it is very DUCTILE

Answer:

Cells are the BASIC building blocks of all LIVING THINGS. The human body is composed of trillions of cells. They provide STRUCTURE for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions.

Explanation:

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Answer:

Bond order is the NUMBER of chemical bonds between a pair of atoms; in DIATOMIC nitrogen (N≡N) for example, the bond order is 3, while in acetylene (H−C≡C−H), the bond order between the two carbon atoms is 3 and the C−H bond order is 1. Bond order indicates the stability of a bond...

ANSWER:

Gypsum is CALCIUM sulfate (CaSO4). Refined gypsum in the ANHYDRITE form (no water) is 29.4 percent calcium (Ca) and 23.5 percent sulfur (S). Usually, gypsum has water ASSOCIATED in the molecular STRUCTURE (CaSO4·2H2O) and is approximately 23.3 percent Ca and 18.5 percent S (plaster of paris).

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Answer:

n=16a+8  

n=18b+8  

Lets rearrange the EQUATION for further convenience. You’ll figure out why it is needed.

n−8=16a  

n−8=18b  

From the REARRANGED equations it can be inferred that  n−8  is divisible by both  16  and  18 . This doesn’t happen unless  n−8  is a MULTIPLE of  LCM  of  16  and  18 .

LCM  of  16  and  18 , GIVES us second such number (read  n− 8), which is divided by both  16  and  18 . [First such number is  0  itself.]

We know that  LCM(16,18)=144 , which is nothing but  n−8  as per our discussion, giving us  n  as  152 .

We can recheck the conditions given in the question. Reminder when  152  is divided by  16  and  18  is indeed  8 .

Since this is a  3−digit  number,  152  is the not the number we are looking for.

Explanation:

EXPLANATION:

जीव विज्ञान का पिता ग्रीक दार्शनिक अरस्तू (३८४-३२२ ई. पू.) को कहा जाता है। जीवविज्ञान का एक क्रमबद्ध ज्ञान के रूप में विकास उन्हीं के काल में हुआ।