I would really like help for this question ASAP! pleasee! I thank you ahead of time.
The question refers to an experiment using equal volumes of O2 gas and three other gases "X", "Y", "Z", at the same temperature and pressure. If the respective masses are: 02 = 0.96g X = 1.92g "Y" = 0.90g "Z" = 0.48g. The molecular mass of gas "Z" in g is:
a. 1.0
b. 16
c. 32
d. 44
e. 121
Gas "Y" could be which of the following?
a. butane (C4H10)
b. oxygen
c. NO
d. Nitrogen
e. SO2
The idea is equal volumes at equal pressures have the same number of moles
so mol mass is going to be directly proportional to mass
molmass/molmassO2=.48/.96
for Y, molmass= 32*.90/.96 which leads to the correct formula weigh among the choices.
To answer the first question and determine the molecular mass of gas "Z," we can use the concept of molar mass and the molar volume of gases at the same temperature and pressure.
1. Calculate the number of moles of each gas:
- O2: 0.96g / molar mass of O2.
- X: 1.92g / molar mass of X.
- Y: 0.90g / molar mass of Y.
- Z: 0.48g / molar mass of Z.
2. Equal volumes of gases at the same temperature and pressure contain an equal number of moles. Therefore, the ratio of the molar masses of the gases is equal to the ratio of their respective masses.
3. Set up a ratio using the provided masses:
(molar mass of O2) / (molar mass of Z) = (mass of O2) / (mass of Z)
(molar mass of O2) / (molar mass of Z) = 0.96g / 0.48g
4. Find the molecular mass of gas "Z" by rearranging the equation:
(molar mass of Z) = (molar mass of O2) / ((mass of O2) / (mass of Z))
(molar mass of Z) = (molar mass of O2) / 2
5. Now, you can substitute the molecular mass of O2, which is 32 g/mol, into the equation:
(molar mass of Z) = 32g/mol / 2
(molar mass of Z) = 16 g/mol
Therefore, the molecular mass of gas "Z" is 16 g/mol.
Moving on to the second question, to determine the possible identity of gas "Y":
- Butane (C4H10) has a molecular mass of 58 g/mol.
- Oxygen (O2) has a molecular mass of 32 g/mol.
- NO (nitric oxide) has a molecular mass of 30 g/mol.
- Nitrogen (N2) has a molecular mass of 28 g/mol.
- SO2 (sulfur dioxide) has a molecular mass of 64 g/mol.
Based on the provided molecular mass of gas "Y" (0.90g), we can calculate the number of moles and compare it to the molecular masses listed above.
6. Calculate the number of moles of gas "Y":
- Moles of Y = 0.90g / molar mass of Y
7. Compare the moles of Y to the moles corresponding to the possible gases:
- If the number of moles matches any of the possible gases, it is a correct answer.
So, by calculating the moles of gas "Y" and comparing it to the possible gases, you can determine which gas "Y" could be.