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S_A_V [24]
3 years ago
8

In

Chemistry
1 answer:
Lelechka [254]3 years ago
4 0

Answer:

V =  33.62 L

Explanation:

Given data:

Volume = ?

Number of moles of oxygen = 1.5 mol

Temperature = 273 K

Pressure = 1 atm

Solution:

Standard pressure = 1 atm

Standard temperature = 273 K

PV = nRT

V = nRT/ P

V = 1.5 mol × 0.0821 atm. L. K⁻¹. mol⁻¹ ×  273 k / 1 atm

V = 33.62 L. atm// 1 atm

V =  33.62 L

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Determine the number of moles in 254 molecules of bromine.
Natali5045456 [20]

Answer:

4.22 × 10 ⁻²² mol

Explanation:

Given data:

Number of molecules of bromine = 254 molecules

Number of moles = ?

Solution:

1 mole = 6.02 × 10 ²³ molecules

254 molecules × 1  mol / 6.02 × 10 ²³ molecules

42.2 × 10 ⁻²³ mol

4.22 × 10 ⁻²² mol

3 0
3 years ago
Given the general chemical equation 3A + 2B → C + 5D,
Irina-Kira [14]

Answer :

(a) The number of moles of D produced can be, 6.67 moles.

(b) The volume of D prepared can be, 24.5 L

Explanation :

The given chemical reaction is:

3A+2B\rightarrow C+5D

Part (a) :

From the balanced chemical reaction, we conclude that:

As, 3 moles of A react to give 5 moles of D

So, 4 moles of A react to give \frac{5}{3}\times 4=6.67 moles of D

Thus, the number of moles of D produced can be, 6.67 moles.

Part (b) :

As we know that 1 moles of substance occupies 22.4 L volume of gas.

As, 2\times 22.4L volume of B gives 5\times 22.4L volume of D

As, 9.8 L volume of B gives \frac{5\times 22.4L}{2\times 22.4L}\times 9.8L=24.5L volume of D

Thus, the volume of D prepared can be, 24.5 L

4 0
3 years ago
What is an ecosystem?<br> living environment by the way
MAVERICK [17]
An ecosystem is a lot of things and places that need each other to survive
4 0
4 years ago
In a Compton scattering experiment, an x-ray photon scatters through an angle of 17.4 from a free electron that is initially at
skelet666 [1.2K]

Answer:

D that is

Explanation:

5 0
4 years ago
Which of the following atoms forms an ionic bond with a sulfur atom? (Points : 3)
elena-s [515]
Ionic bonds are formed when there is complete transfer of valence electrons between two atoms.

Electronegativity tells the trend of an atom to atract electrons.

You should search for the complete set of rules that indicate whether an ionic or covalent bond happens.

There are two relevant rules to state if whether an ionic bond will happen:

- When the difference of electronegativities between the two atoms is greater than 2.0, then the bond is ionic.

- When the difference is between 1.6 and 2.0, the bond is ionic if one of the elements is a metal.

You need to list the electronegativities of the five elements (there are tables with this information)

Element  electronegativity

Cu:    1.9
H:      2.2
Cl      3.16
I:        2.66
S:      2.58

Differences:

Cu / S: 2.58 - 1.9 = 0.68
H / S: 2.58 - 2.2 = 0.38
Cl / S: 3.16 - 2.58 =0.58
I / S: 2.66 -  2.58 = 0.08

 Those differences are too low to consider that the bond is ionic.

Then the answer is that none of those atoms forms an ionic bond with sulfur.
8 0
3 years ago
Read 2 more answers
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