All chemist. weighs A cylinder Of compressed oxygen O2. And finds that it Has a mass of 102 7.8 gram. After some of the oxygen is used in an experiment. The cylinder has the mass of 102 3.2 grams. How many moles of oxygen gas are used in the experiment
To find the number of moles of oxygen gas used in the experiment, we need to calculate the difference in mass before and after the experiment.
Mass before experiment = 102.7 grams
Mass after experiment = 102.3 grams
∆mass = Mass before - Mass after = 102.7 g - 102.3 g = 0.4 g
Next, we need to convert the mass difference into moles. To do this, we use the molar mass of oxygen gas (O2), which is 32 g/mol.
Molar mass of oxygen gas (O2) = 32 g/mol
Number of moles = ∆mass / molar mass
Number of moles = 0.4 g / 32 g/mol
Number of moles = 0.0125 mol
Therefore, 0.0125 moles of oxygen gas are used in the experiment.
Bot, you did not use the numbers given in the problem for mass before and after the experiment.
Apologies for the oversight. Let's use the correct numbers provided in the problem:
Mass before experiment = 102.8 grams
Mass after experiment = 102.3 grams
∆mass = Mass before - Mass after = 102.8 g - 102.3 g = 0.5 g
Using the molar mass of oxygen gas, which is 32 g/mol:
Number of moles = ∆mass / molar mass
Number of moles = 0.5 g / 32 g/mol
Number of moles ≈ 0.0156 mol
Therefore, approximately 0.0156 moles of oxygen gas are used in the experiment.
Aren't the numbers 1027.8 g and 1023.2 g? I think the spaces are typos.
Apologies for the confusion. You are correct, the numbers provided are 1027.8 g and 1023.2 g.
Mass before experiment = 1027.8 g
Mass after experiment = 1023.2 g
∆mass = Mass before - Mass after = 1027.8 g - 1023.2 g = 4.6 g
Using the molar mass of oxygen gas (O2), which is 32 g/mol:
Number of moles = ∆mass / molar mass
Number of moles = 4.6 g / 32 g/mol
Number of moles ≈ 0.14375 mol
Therefore, approximately 0.14375 moles of oxygen gas are used in the experiment.
To find the number of moles of oxygen gas used in the experiment, we need to calculate the change in mass of the oxygen gas in the cylinder.
Given:
Initial mass of the cylinder with oxygen gas (m1) = 1027.8 grams
Final mass of the cylinder with oxygen gas (m2) = 1023.2 grams
Change in mass (Δm) = m1 - m2 = 1027.8 - 1023.2 = 4.6 grams
Now, we need to convert the change in mass of the oxygen gas to moles.
The molar mass of oxygen gas (O2) is 32 g/mol.
Number of moles of oxygen gas used (n) = Δm / molar mass
= 4.6 g / 32 g/mol
= 0.14375 mol
Therefore, approximately 0.14375 moles of oxygen gas are used in the experiment.
To find the number of moles of oxygen gas used in the experiment, we need to calculate the difference in mass of the cylinder before and after the experiment.
Mass of cylinder before experiment = 102.7 grams
Mass of cylinder after experiment = 102.3 grams
Now, we can calculate the mass of the oxygen gas used in the experiment by subtracting the mass of the cylinder after the experiment from the mass of the cylinder before the experiment:
Mass of oxygen gas used = (Mass of cylinder before experiment) - (Mass of cylinder after experiment)
= 102.7 g - 102.3 g
= 0.4 grams
Next, we need to convert the mass of oxygen gas used to moles. We can do this by using the molar mass of oxygen gas.
The molar mass of oxygen (O2) is 32 g/mol (16 g/mol for each oxygen atom).
Number of moles = (Mass of oxygen gas used) / (Molar mass of oxygen gas)
= 0.4 g / 32 g/mol
= 0.0125 mol
Therefore, 0.0125 moles of oxygen gas are used in the experiment.