Science, asked by darshanshiva8431, 6 months ago

a) Calculate the percentage composition of Sodium, Sulphur and Oxygen in Na2SO4

[Given: Atomic mass of Na=23 u, S=32 u, O=32 u).

b) Express the following in scientific notation

(i) 0.00345.

(ii) 234.5.

Answers

Answered by AcsahJosemon

Answer:

We may say sodium sulfate is 32.37% sodium, 22.57% sulfur, and 45.06% oxygen; or, 32.37% sodium and 67.63% sulfate. The total is 100% in either case. We now have two sets of numbers which show mass relationships among the elements in sodium sulfate: (1) the formula mass and (2) the percentage composition.

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