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Maurinko [17]
3 years ago
5

(03.02 LC) Lithium has a 1+ charge, and oxygen has a 2− charge. A Lewis dot diagram should contain one lithium atom and two oxyg

en atoms to show how these atoms form an ionic bond. True False

Chemistry
2 answers:
tamaranim1 [39]3 years ago
8 0

false,

the lewis dot structure of lithium oxide will not include only one lithium atom and two oxygen atom,

it will include 2 lithium atom and one oxygen atom so that an ionic compound is formed.

lithium contains +1 positive charge and oxygen contains -2 negative charge so as to make an ionic bond, two lithium should give its 2 electrons to 1 atom of oxygen.

2[Li]⁺ [O]⁻²

san4es73 [151]3 years ago
5 0

Answer: The statement is false.

Explanation:

Atomic number of lithium is 3 and its electronic distribution is 2, 1. Therefore, lithium has only one electron to donate.

Whereas atomic number of oxygen is 8 and its electronic configuration is 2, 6.

So, oxygen needs two more electrons to complete its octet. Thus, two lithium atoms will donate each valence electron to an oxygen atom.

Hence, there will be two lithium atoms and one oxygen atom in a molecule of lithium oxide (Li_{2}O). Though there is sharing of electrons so the bond formed will be ionic bond.

Therefore, we can conclude that the statement a Lewis dot diagram should contain one lithium atom and two oxygen atoms to show how these atoms form an ionic bond is false.

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3 years ago
How are physical and<br>chemical changes different?​
astra-53 [7]
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Sorry for the long answer but hope this helps!
5 0
3 years ago
A scientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘C. What is the molar mass of this gas?
Ivan

Answer:

The molar mass of the gas is 36.25 g/mol.

Explanation:

  • To solve this problem, we can use the mathematical relation:

ν = \sqrt{3RT/M}

Where, ν is the speed of light in a gas <em>(ν = 449 m/s)</em>,

R is the universal gas constant <em>(R = 8.314 J/mol.K)</em>,

T is the temperature of the gas in Kelvin <em>(T = 20 °C + 273 = 293 K)</em>,

M is the molar mass of the gas in <em>(Kg/mol)</em>.

ν = \sqrt{3RT/M}

(449 m/s) = √ (3(8.314 J/mol.K) (293 K) / M,

<em>by squaring the two sides:</em>

(449 m/s)² = (3 (8.314 J/mol.K) (293 K)) / M,

∴ M = (3 (8.314 J/mol.K) (293 K) / (449 m/s)² = 7308.006 / 201601 = 0.03625 Kg/mol.

<em>∴ The molar mass of the gas is 36.25 g/mol.</em>


7 0
3 years ago
_______ is the process in which light energy is transformed into food energy. A.life B.photosynthesis C.abiotic D.biotic
kolezko [41]

Answer:

B) Photosynthesis is the process in which light energy is transformed into food energy.

4 0
2 years ago
Read 2 more answers
A gas has a volume of 5.0 L at a pressure of 50 KPa. What happens to the volume when the pressure is increased to 125?
Alexeev081 [22]
The volume becomes two. You have to use the equation P1 x V1 = P2 x V2 
P is pressure and V is volume.
P1 = 50     P2 = 125
V1 = 5       V2 = v (we don't know what it is)
Then set up the equation:
50 times 5 = 125 times v
250 = 125v
the divide both sides by 125 and isolate v
2 = v
Therefore the volume is decreased to 2.
Also, Boyle's Law explains this too: Volume and pressure are inversely related, This means that when one goes up the other goes down (ie when pressure increases volume decreases and vice versa). Becuase the pressure went up from 50 KPa tp 125 KPa the volume had to decrease.

7 0
3 years ago
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