Copper(ii) sulfate pentahydrate, cuso4 ·5 h2o, (molar mass 250 g/mol) can be dehydrated by repeated heating in a crucible. which value is closest to the percentage mass of water lost from the total mass of salt in the crucible when the crucible undergoes repetitive heatings until a constant mass is reached? 25%13%36%26%

What is avogadro’s number, and why is it useful

Which metal exist in liquid state and can be cut with knife ?

Consider the following reaction at equilibrium. 2co2 (g) 2co (g) + o2 (g) h° = -514 kj le châtelier's principle predicts that the equilibrium partial pressure of co (g) can be maximized by carrying out the reaction a. at high temperature and high pressure b. at high temperature and low pressure c. at low temperature and low pressure d. at low temperature and high pressure e. in the presence of solid carbon