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leonid [27]
3 years ago
7

If you have 0.56 moles of an ideal gas at 87c and a pressure of 569 torr, what volume will the gas take up

Chemistry
1 answer:
Free_Kalibri [48]3 years ago
8 0
R //  <span>22 litros
ojala q mi respuesta te sirva ;)</span>
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Anions have more ___ then __
never [62]
C protons, elctrons 093939393
6 0
3 years ago
A solution of HNO3HNO3 is standardized by reaction with pure sodium carbonate. 2H++Na2CO3⟶2Na++H2O+CO2 2H++Na2CO3⟶2Na++H2O+CO2 A
Gemiola [76]

Answer:

(0,653±0,002) M of HNO₃

Explanation:

The reaction of standarization of HNO₃ with Na₂CO₃ is:

2 HNO₃ + Na₂CO₃ ⇒ 2 Na⁺ + H₂O + CO₂ + 2NO₃⁻

To obtain molarity of HNO₃ we need to know both moles and volume of this acid. The volume is (27,71±0,05) mL and to calculate the moles it is necessary to obtain the Na₂CO₃ moles and then convert these to HNO₃ moles, thus:

0,9585 g of Na₂CO₃ × ( 1 mole / 105,988 g) =

9,043×10⁻³ mol Na₂CO₃ × ( 2 moles of HNO₃ / 1 mole of Na₂CO₃) = 1,809×10⁻² moles of HNO₃

Molarity is moles divide liters, thus, molarity of HNO₃ is:

1,809×10⁻² moles / 0,02771 L = 0,6527 M of HNO₃

The absolute uncertainty of multiplication is the sum of relative uncertainty, thus:

ΔM = 0,6527M× (0,0007/0,9585 + 0,001/105,988 + 0,05/27,71) =

0,6527 M× 2,54×10⁻³ = 1,7×10⁻³ M

Thus, molarity of HNO₃ solution and its absolute uncertainty is:

(0,653±0,002) M of HNO₃

I hope it helps!

5 0
3 years ago
Are the noble gases considered inert or reactive? Why?
mr Goodwill [35]

Answer:

Noble gases are considered as Inert because they are unreactive.

Explanation:

Seven noble elments are known to us , they are: helium, neon, argon, krypton, xenon, radon, and oganesson. Noble gases have 8 electrons in their outermost shell and hence their valence shell is complete, they donot need further electrons to complete their octet so they are unreactive. Also they posses following properties.

8 0
3 years ago
A cube has a length of 1.02 cm and a mass of .001012 kg what is its density ​
slega [8]

Answer:

d = 9.5× 10⁻⁴ Kg/cm³

Explanation:

Given data:

Length of cube = 1.02 cm

Mass of cube = 0.001012 Kg

Density of cube = ?

Solution:

The length , height and width of cube is always same. Thus the volume of cube is,

Volume = length × height× width

Volume = 1.02 cm × 1.02 cm × 1.02 cm

Volume = 1.06 cm³

Density of cube:

d = 0.001012 Kg /1.06 cm³

d = 9.5× 10⁻⁴ Kg/cm³

8 0
3 years ago
Which of the following aqueous solutions would have the highest boiling point? 3.0 M solution of molecular compound sucrose (C12
Ne4ueva [31]

Answer: option b) 3.0 M solution of ionic compound aluminum chloride (AlCl₃)


Explanation:


1) The solutions given are:


a) 3.0 M solution of molecular compound sucrose (C₁₂H₂₂O₁₁)


b) 3.0 M solution of ionic compound aluminum chloride (AlCl₃)


c) 3.0 M solution of ionic compound lithium bromide (LiBr)


d) 3.0 M solution of ionic compound calcium fluoride (CaF₂)


2) The elevation of the boiling point of a solution is a colligative property.


3) That means that the elevation of the boiling point depends on the number of solute particles in the solvent and not the identity per se of the solute particles.


4) The formula of the elevation of the boiling point, ΔTb is:


ΔTb = i × m × Kb.


Where:


i) i is the Van't Hoof constant and is equal to the number of particles for each molecule or unit formula.


If the compound is a molecule (covalent bond) i = 1, if the compound is ionic, i is the number of ions product of the dissociation (I will show you how to determine it for each of the compounds given).


ii) m is the molality of the solution (moles of solute per kg of solvent)


iii) Kb is the molality boiling constant. It is a constant for every solvent. It does not change with the solute.


4) For our four compounds, m and kb are egual, so you must analyze the i factor for each solution.


a) 3.0 M solution of molecular compound sucrose (C₁₂H₂₂O₁₁)


Since it is a molecular compound it does not dissociate and i = 1


b) 3.0 M solution of ionic compound aluminum chloride (AlCl₃)


Assume the ionic compound dissociates 100%. The for eveary unit of AlCl₃ there will be 4 ions. Those are 4 particles and means that i = 4.


c) 3.0 M solution of ionic compound lithium bromide (LiBr)


Assuming also 100% dissociation of this ionic compound, since every LiBr unit dissociates into two ions, i = 2.


d) 3.0 M solution of ionic compound calcium fluoride (CaF₂)


Following same reasoning, i = 3.


5) Conclusion: since the greatest i factor is 4, and given all the other factors equal, the 3.0 M solution of ionic compound aluminum chloride (AlCl₃), option b, would be the aqueous solutions with the highest boiling point,

8 0
3 years ago
Read 2 more answers
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