Asolution is made by dissolving 373.5 g of pb(no3)2 (molar mass: 331.2 g/mol) in 2.00 × 103 g of water. what is the molality of the solution?

Asample of rose gold is: 12.0 g gold, 5.0g silver, and 7.0 g copper. what is the percent copper in the sample?

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

Identify one disadvantage to each of the following models of electron configuration: dot structures arrow and line diagrams written electron configurations type in your answer below.