The normal boiling point of a certain liquid x is 120.7°c , but when 58.66g of urea nh22co are dissolved in 950.g of x , it is found that the solution boils at 123.0°c instead. use this information to calculate the molal boiling point elevation constant kb of x .

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.

Asample of tin (ii) chloride has a mass of 0.49 g. after heating, it has a mass of 0.41 g.  what is the percent by mass of water in the hydrate?   %

Plzz a sample of table sugar (sucrose, c12h22o11) has a mass of 7.801 g. ● a) calculate the number of moles of c12h22o11 in the sample b) calculate the number of moles of each element in c12h22o11 (number of moles of c, number of moles of h & number of moles of o) in the sample. (use your answer from part a as your starting point.) show your work and highlight your final answer. calculate the number of atoms of each element in c12h22o11 (number of atoms of c, number of atoms of h & number of atoms of o) in the sample. (use your answers from part b as your starting for each element.) show your work and highlight your final answer.