On heating, potassium chlorate decomposes to potassium chloride and oxygen. In one experiment 30g of potassium chlorate generates 14.9g

Question

On heating, potassium chlorate decomposes to potassium chloride and oxygen. In one experiment 30g of potassium chlorate generates 14.9g

(a) On heating, potassium chlorate decomposes to potassium chloride and oxygen. In one experiment 30g of potassium chlorate generates 14.9g of potassium chloride and 9.6g of oxygen. What mass of potassium chlorate remains unrecompensed ?

(b) Write two characteristic properties of nucleus. Compare these with the properties of an electron.

Monjur Alahi

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2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

(a) 2KCIO₃→2KCI + 3O₂

30g 14.9g 9.6g

Suppose mass of under composed KCIO₃ = xg

According to law of conservation of mass the total mass before and after the reaction remains constant. 30.0 = x + 14.9 + 9.6

x = 5.5 g

(b) (i) Nucleus is present in the centre of atom and it contains protons and neutrons.

(ii) Nucleus is positively charged centre having appreciable mass. Electron is present in extra nuclear resion of atom. Electron is negatively charged particle with negligible mass.