What volume of 0.100M Na3PO4 is required to precipitate all the lead(II) ions from 100.0 mL of 0.400M Pb(NO3)2

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

Drug abuse will not lead to physical and psychological dependence. true or false ?