How could you detect fluoride if this had been present in paper chromotography ? help

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

What is the mass of 0.46 mil of mgcl2

If you add 5.00 ml of 0.100 m sodium hydroxide to 50.0 ml of acetate buffer that is 0.100 m in both acetic acid and sodium acetate, what is the ph of the resulting solution? acetic acid: ka = 1.8. x 10-5