Question 31 : A compound contains 40% of Sulphur and 60% of Oxygen, what is the empirical formula of the compound?
1. SO2
2. SO3
3. SO4
4. None of the mentioned
View Answer   Discuss with Members

Question 32 : A mixture contains 80% of NaOH and 20% H₂O by weight, what is the mole fraction of NaOH?
1. 0.24
2. 0.42
3. 0.64
4. 0.78
View Answer   Discuss with Members

Question 33 : A mixture contains 80% of HCl and 20% H₂O by weight, what is the mole fraction of HCl?
1. 0.15
2. 0.29
3. 0.45
4. 0.66
View Answer   Discuss with Members

Question 34 : A mixture contains 10 grams each of CH4, H₂O, and SO₂, what is the mole fraction of CH4?
1. 0.14
2. 0.31
3. 0.46
4. 0.67
View Answer   Discuss with Members

Question 35 : A mixture contains 9 gram each of H₂O and NaCl, what is the mole fraction of NaCl?
1. 0.15
2. 0.23
3. 0.45
4. 0.64
View Answer   Discuss with Members

Question 36 : A mixture contains 23 g of ethanol and 36 g of water, some acetic acid is added to the mixture and its mole fraction becomes 0.5, how much acetic acid was added?
1. 25 g
2. 75 g
3. 100 g
4. 150 g
View Answer   Discuss with Members

Question 37 : A neutral gas that is made of nitrogen and hydrogen only contains 7 g of nitrogen is in a mixture of with total mass 17 g, what is the mass fraction of the gas?
1. 0.5
2. 0.25
3. 0.45
4. 0.8
View Answer   Discuss with Members

Question 38 : A mixture of gases SO₂, O₂ and 4 g of N₂ and total mass of mixture is 10 g, what is the sum of mole fraction of SO₂ and O₂?
1. 0.25
2. 0.5
3. 0.75
4. 1
View Answer   Discuss with Members

Question 39 : If the mole fraction of SO₂ in H₂SO₄ is 0.2, what is the ratio of mass of sulfur and oxygen in the solution?
1. 0.166
2. 6
3. 1.8
4. 0.555
View Answer   Discuss with Members

Question 40 : A solution has 25% w/w solution of Sodium Chloride in 10 grams of water what is the mole fraction of Sodium Chloride?
1. 0.05
2. 0.06
3. 0.07
4. 0.08
View Answer   Discuss with Members