1) the weight of water in 1litre of 2M nacl solution of density 1.117g/ml.

2)there are two common oxides of sulphur one of which contains 50percent oxygen by weight the other almost 60 percent.the weight of sulphur which combine with 1g o2 are in ratio

These look like 2 statements, and I see no question for us to answer.

Sra

16.11 g

1) To find the weight of water in 1 liter of a 2M NaCl solution with a density of 1.117 g/ml, we need to determine the volume of water in the solution first.

First, we need to find the volume of the NaCl solution in liters. Since the density is given as 1.117 g/ml, we can convert grams to liters by dividing the weight of the solution by its density:

Weight of the solution = Volume × Density
Volume = Weight of the solution / Density
Volume = 1000 ml / 1.117 g/ml

Now we have the volume of the NaCl solution in liters. To find the weight of water, we need to subtract the weight of the NaCl from the weight of the solution.

Since the NaCl solution is 2M, it means there are 2 moles of NaCl in 1 liter of the solution. The molar mass of NaCl is 58.44 g/mol. Therefore, the weight of NaCl in the solution is:

Weight of NaCl = 2 moles × 58.44 g/mol

Finally, we can find the weight of water in the solution by subtracting the weight of NaCl from the weight of the solution:

Weight of water = Weight of the solution - Weight of NaCl

2) The two common oxides of sulfur are sulfur dioxide (SO2) and sulfur trioxide (SO3).

Sulfur dioxide (SO2) contains 50% oxygen by weight, which means that the oxygen in the compound accounts for half of its total weight. This means that for every gram of SO2, there will be 0.5 grams of oxygen.

Sulfur trioxide (SO3) contains almost 60% oxygen by weight, which means that the oxygen in the compound accounts for nearly 60% of its total weight. This means that for every gram of SO3, there will be approximately 0.6 grams of oxygen.

To calculate the weight of sulfur that combines with 1 gram of oxygen for both compounds, we need to apply the concept of stoichiometry using their chemical formulas.

For sulfur dioxide (SO2), the molar mass of sulfur is 32.06 g/mol and the molar mass of oxygen is 16.00 g/mol. The ratio of sulfur to oxygen in SO2 is 1:2 (one sulfur atom is combined with two oxygen atoms). Therefore, the weight of sulfur that combines with 1 gram of oxygen in SO2 is:

Weight of sulfur in SO2 = (1 g oxygen) × (1 mol SO2 / 32.00 g oxygen) × (32.06 g sulfur / 1 mol SO2) = 1.00 g sulfur

For sulfur trioxide (SO3), the molar mass of sulfur is 32.06 g/mol and the molar mass of oxygen is 16.00 g/mol. The ratio of sulfur to oxygen in SO3 is 1:3 (one sulfur atom is combined with three oxygen atoms). Therefore, the weight of sulfur that combines with 1 gram of oxygen in SO3 is:

Weight of sulfur in SO3 = (1 g oxygen) × (1 mol SO3 / 48.00 g oxygen) × (32.06 g sulfur / 1 mol SO3) = 0.669 g sulfur (approximately)

So, the weight of sulfur that combines with 1 gram of oxygen in SO2 is 1 gram, while in SO3 it is approximately 0.669 grams. Hence, the ratio of the weights of sulfur to oxygen is approximately 1:0.669, or simply 2:1.