Tanmay

This page lists questions and answers that were posted by visitors named Tanmay.

Questions

The following questions were asked by visitors named Tanmay.

100g of calcium carbonate was decomposed by heating to produce 45g of calcium oxide and carbon dioxide, using the equation given, calculate the Percentage Yield of Calcium Carbonate. CaCO3 -------> CaO + CO2 Please help me i tried working out but kept on...

Answers

The following answers were posted by visitors named Tanmay.

secAcotB-secA-2cotB+2=0 (1/cosA)(cosB/sinB) - (1/cosA)- 2(cosB/sinB) = -2 multiply each term by sinBcosA cosB - sinB - 2cosBcosA = -2cosAsinB cosB - sinB - 2cosBcosA + 2cosAsinB = 0 (cosB - sinB) - 2cosA(cosB - sinB) = 0 (cosB - sinB)(1 - 2cosA) = 0 cosB...

The trick here is to recall that 1 = cos^a+sin^2A cos2A/(1+sin2A) (cos^2A-sin^2A)/(1+2sinAcosA) (cos^2A-sin^2A)/(cos^2A+2sinAcosA+sin^2A) (cosA+sinA)(cosA-sinA)/(cosA+sinA)^2 (cosA-sinA)/(cosA+sinA) (cotA-1)/(cotA+1)