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4vir4ik [10]
3 years ago
15

What is the empirical formula of a molecule containing 18.7% lithium, 16.3% carbon, and 65% oxygen?

Chemistry
1 answer:
aliya0001 [1]3 years ago
8 0
Li2CO3 ; variance= 1.26x10^-3
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A mixture of nitrogen and neon gas is compressed from a volume of to a volume of , while the pressure is held constant at . Calc
Mamont248 [21]

Answer:

-266 kJ

Explanation:

There is some info missing. I think this is the original question.

<em>A mixture of nitrogen and neon gas is expanded from a volume of 53.0 L to a volume of 90.0 L, while the pressure is held constant at 71.0 atm. Calculate the work done on the gas mixture. Be sure your answer has the correct sign (positive or negative) and the correct number of significant digits.</em>

<em />

Given data

Initial volume = 53.0 L

Final volume = 90.0 L

Pressure = 71.0 atm

We can find the work (w) associated with the expansion of the gaseous mixture using the following expression.

w = - P × ΔV = - 71.0 atm × (90.0 L - 53.0 L) = -2.63 × 10³ atm . L

w = -2.63 × 10³ atm . L × (101.3 J/ 1 atm . L) = -2.66 × 10⁵ J = -266 kJ

The negative sign means that the system does work on the surroundings.

7 0
3 years ago
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vladimir1956 [14]

A) H and Cl

E) C and O

6 0
3 years ago
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Ugo [173]
I believe the answer is letter C
3 0
3 years ago
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Based on Gay-Lussac's law, which of the following statements is true for an ideal gas at constant volume and mole amount?
Mekhanik [1.2K]

Answer:

Option C. Pressure is directly proportional to the absolute temperature.

Explanation:

The ideal gas equation is given as:

PV = nRT

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Since n and V are constant, it means that P will be directly proportional to the absolute temperature

5 0
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Answer:

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Explanation:

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