How much water needs to be added to 55 mL of 3.0 M stock solution to
produce a .75 M solution?

What is the composition, in atom percent, of an alloy that consists of 4.5 wt% pb and 95.5 wt% sn? the atomic weights for pb and sn are 207.19 g/mol and 118.71 g/mol, respectively.(a) 2.6 at% pb and 97.4 at% sn(b) 7.6 at% pb and 92.4 at% sn(c)97.4 at% pb and 2.6 at% sn(d) 92.4 at% pb and 7.6 at% sn

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

What three natural resources are found in the great lakes region