Answer : The moles of oxygen gas lost are 2.88 mole
Explanation :
According to the Avogadro's Law, the volume is directly proportional to the number of moles of the gas at constant pressure and temperature.
(At constant temperature and pressure)
or,
where,
= initial volume of oxygen gas = 12.6 L
= final volume of oxygen gas = 12.1 L
= initial moles of oxygen gas = 3.0 mole
= final moles of oxygen gas = ?
Now put all the given values in the above formula, we get the final moles of oxygen gas.
Therefore, the moles of oxygen gas lost are 2.88 mole
I would say there are approximately 5
Depends on how you separate it
Answer:
1 and 2
Explanation:
Venus has no atmosphere, meaning there is no oxygen and we could not breathe, so we would die in a matter of minutes.
Also, the temperature of Venus is extremely hot, so we would burn to death extremely quickly.
Number of moles of a substance can be calculated from mass of the substance and its molar mass as follows:
Here, n is number of moles, m is mass and M is molar mass.
For aspirin: 324 mg
Molecular formula is and molar mass of aspirin is 180.157 g/mol, thus, number of moles will be:
For sodium hydrogen carbonate: 1904 mg
Molecular formula is and molar mass is 84.007 g/mol, thus, number of moles will be:
For citric acid: 1000 mg
Molecular formula is and molar mass is 192.124 g/mol, thus, number of moles will be:
Therefore, number of moles of aspirin, and citric acid in the tablet is 0.0018 mol, 0.0226 mol and 0.0052 mol respectively.