The molecular formula for caffeine is CsHioN402. Which of the following elements is not found in caffeine?
1 answer:
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Answer:
- <u>25.0 liter of nitrogen gas</u>
Explanation:
<u>1. Chemical equation</u>
Ammonium nitrite is a solid compound that decomposes into nitrogen gas and water vapor as per this chemical equation:
<u>2. Mole ratio</u>
<u>3. Volume ratio</u>
Since, both species are gases and are at same temperature and pressure, the volume ratio is equal to the mol ratio.
Thus, the volume ratio is:
<u>4. Use the volume ratio with the known amount of water produced</u>
Answer:
The mass of the neon gas m = 1.214 kg
Explanation:
Pressure = 3 atm = 304 k pa
Volume = 0.57 L = 0.00057
Temperature = 75 °c = 348 K
Universal gas constant = 0.0821
We have to change the unit of this constant. it may be written as
Universal gas constant = 8.314
Gas constant for neon = = 0.41
From ideal gas equation,
P V = m R T ------- (1)
We have all the variables except m. so we have to solve this equation for mass (m).
⇒ 304 × × 0.00057 = m × 0.41 × 348
⇒ 173.28 = 142.68 × m
⇒ m = 1.214 kg
This is the mass of the neon gas.