State the IUPAC name (alcohol)

A mixture of methane and krypton gases is maintained in a 8.99 L flask at a pressure of 1.68 atm and a temperature of 46 °C. If

sweet-ann [11.9K]

Answer:

22.81 g

Explanation:

Given that:

Pressure = 1.68 atm

Temperature = 46 °C

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15

So,

T = (46 + 273.15) K = 319.15 K

Volume = 8.99 L

Using ideal gas equation as:

PV=nRT

where,

P is the pressure

V is the volume

n is the number of moles

T is the temperature

R is Gas constant having value = 0.0821 L.atm/K.mol

Applying the equation as:

1.68 atm × 8.99 L = n × 0.0821 L.atm/K.mol × 319.15 K

⇒n = 0.5764 moles

Given that :

Amount of methane = 4.88 g

Molar mass = 16.04 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{4.88\ g}{16.04\ g/mol}$

$Moles= 0.3042\ mol$

Moles of Krypton = Total moles - Moles of methane = 0.5764 - 0.3042 moles = 0.2722 moles

Also, Molar mass of krypton = 83.798 g/mol

So,

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$0.2722\ moles=\frac{Mass}{83.798\ g/mol}$

Mass of krypton = 22.81 g

6 0

3 years ago

Pure substance uniform

Lerok [7]

What? there isn’t a question here

6 0

3 years ago

Current is created by the movement of what subatomic particle?

Licemer1 [7]

Answer:

I believe the answer is electrons.

Explanation:

Protons can't move and neurons don't have a charge so it would be electrons.

3 0

2 years ago

Balance each skeleton reaction, use Appendix D to calculate E°cell, and state whether the reaction is spontaneous:(b) Hg₂²⁺(aq)

Olegator [25]

The given reaction is not spontaneous.

We must recognize changes in oxidation states that take place across elements in order to balance these equations. To accomplish this, keep in mind following guidelines:

A neutral element on its own has an oxidation number of zero.For a neutral molecule, the total number of oxidations must be zero.The net charge of an ion is equal to the sum of its oxidation numbers.In a compound: hydrogen prefers +1, oxygen prefers -2, fluorine prefers -1.In a compound with no oxygen present the other halogens will also prefer -1.

One of the mercury atoms is oxidized from +1 to +2 in the simple aqueous ion, for a loss of 1 electron.

Oxidation half-reaction:

$0.5 Hg^{2+} _{2} (aq)$ → $Hg^{2+} (aq) + 1e^-$

$E^o _{ox} = - 0.92 V$

The other mercury is reduced from +1 to zero in mercury metal, for a gain of 1 electron.

Reduction half-reaction:

$0.5 Hg^{2+} _{2} (aq) + 1 e^-$ → $Hg(l)$

$E^o _{red} = 0.85V$

This is a disproportionation redox reaction !

Net reaction:

$Hg^{2+} _{2} (aq)$ → $Hg^{2+} (aq) + Hg (l)$

$E^o _{cell} = 0.85 - 0.92 = -0.07V$

The cell potential is negative so this reaction is NOT spontaneous.

To learn more about the non spontaneous reaction please click on the link brainly.com/question/20358734

#SPJ4

5 0

2 years ago

How many electrons are present in an uncharged atom with its 1s, 2s, 2p, 3s, 3p and 4s subshells filled and with five electrons

marshall27 [118]

25

Explanation

The orbital quantum number of an atomic subshell determines the maximum number of electrons it can contain. For example:

Each $s$ orbital $(l = 0)$ holds up to $4 \; l + 2 = 2$ electrons
Each $p$ orbital $(l = 1)$ holds up to $4 \; l + 2 = 6$ electrons
Each $d$ orbital $(l = 2)$ holds up to $4 \; l + 2 = 10$ electrons

The atom in question here contains four fully-occupied $s$ orbitals, two fully-occupied $p$ orbitals along with $5$ electrons in a partially-occupied $d$ orbital. It thus contains

$4 \times 2 + 2 \times 6 + 5 = 25 \; \text{electrons}$

5 0

3 years ago