Advertisements
Advertisements
प्रश्न
Calculate the percentage composition of each element in Potassium chlorate KCIO3.
Calculate the percentage composition of Potassium chlorate KCIO3.
Advertisements
उत्तर
Molar mass of KCIO3 .
= 39 + 35.5 + 48 g
= 122.5 g
So, percentage of Potassium [K]
= `39/122.5 xx 100 %`
= 31.83 %
Now, Percentage of chlorine [Cl]
=`35.5/122.5 xx 100%`
= 28.97 %
Percentage of Oxygen [O2]
= `48/122.5 xx 100%`
= 39.18 %
Notes
Students should refer to the answer according to their questions.
संबंधित प्रश्न
Commercial sodium hydroxide weighing 30 g has some sodium chloride in it. The mixture on dissolving in water and subsequent treatment with excess silver nitrate solution formed a precipitate weighing 14.3 g. What is the percentage of sodium chloride in the commercial sample of sodium hydroxide? The equation for the reaction is
\[\ce{NaCl + AgNO3 -> AgCl + NaNO3}\]
[Relative molecular mass of NaCl = 58, AgCI = 143]
Some of the fertilizers are sodium nitrate NaNO3, ammonium sulphate (NH4)2SO4 and urea CO(NH2)2. Which of these contains the highest percentage of nitrogen?
An acid of phosphorus has the following percentage composition; Phosphorus = 38.27%; hydrogen = 2.47%; oxygen = 59.26%. Find the empirical formula of the acid and its molecular formula, given that its relative molecular mass is 162.
1 g of a mixture of sodium chloride and sodium nitrate is dissolved in water. On adding silver nitrate solution, 1.435 g of AgCl is precipitated.
\[\ce{AgNO3_{( aq)} + NaCl_{( aq)}-> AgCl_{(s)} + NaNO3}\]
Calculate the precentage of NaCl in the mixture.
Find the percentage of oxygen in magnesium nitrate crystals [Mg(NO3).6H2O].
Find the percentage of phosphorus in the fertilizer superphosphate Ca(H2PO4)2.
A sample of ammonium nitrate when heated yields 8.96 litres of steam (measure at STP).
\[\ce{NH4NO3 -> N2O + 2H2O}\]
- What volume of dinitrogen oxide is produced at the same time as 8.96 litres of steam?
- What mass of ammonium nitrate should be heated to produce 8.96 litres of steam? (Relative molecular mass of ammonium nitrate is 80).
- Determine the percentage of oxygen in ammonium nitrate (O = 16).
Calculate the percentage of sodium in sodium aluminium fluoride (Na3AlF6) correct to the nearest whole number. (F = 19; Na = 23; Al = 27)
Calculate the percentage composition of calcium nitrate [Ca = 40 , Cl = 35.5 , N = 14 , O = 16]
Find the percentage of nitrogen in ammonia.
