How many grams of HF are needed to react with 3.0 moles of Sn? *
How many moles of SnF₂ will be produced along with 48 grams of H₂? *

Sn + 2HF (arrow) SnF2 + H2

30g
60g
120g
240g

If you want to create an electrical current, which situation would produce a solution capable of this

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this

Which scientists contributed to the determination of how cfcs in clouds in the upper atmosphere could destroy ozone molecules