PLEASE HELP! 1. There are four stages in the conversion of sulphur into sulphuric acid.
Stage 1: Sulphur is burnt to make sulphur dioxide.
Stage 2: Sulphur dioxide is oxidised to sulphur trioxide (the Contact Process).
Stage 3: Sulphur trioxide is dissolved in sulphuric acid to form oleum.
Stage 4: Oleum is diluted with water to form concentrated sulphuric acid.
(a) State the catalyst and give the equation for stage 2 (the Contact Process).
[3]
(b) Calculate the mass of sulphur needed to make 196 kg of sulphuric acid.
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(c) Give two uses of sulphuric acid.
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(d) Describe what you would see and name the products formed when dilute sulphuric acid reacts
with magnesium carbonate.
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in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.