1. Sodium hydroxide sold commercially has a soluble anti caking agent added so the crystals won't clump up. If excess aqueous lead (II nitrate is added to a 5.0 g sample of commercially sold sodium hydroxide 12.7 g of lead (II) hydroxide are recovered through filtration . What is the % purity of the sample of sodium hydroxide ?

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

answerto predict;