What mineral is not scratched by a fingernail, but is scratched by a copper penny?

Which classification of elements like to lose electrons to become cations?

If you wanted to increase the solubility of a substance, what would you do?'

You have 16.7 grams of hydrogen and 15.4 grams of oxygen in a synthesis rxn. Which is the limiting reagent?

According to the assumptions upon which most reaction mechanisms are based, collisions must occur in order for a chemical reaction to occur, but: a. energy is destroyed in these collisions. b. some molecules react with each other without colliding.

Convert a volume of 3.5 m3 to cubic centimeters.

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase

What is the definition of Amplitude?

An excess of NiCO3, 12 g, was added to 40cm cube of sulpheric acid, 2.0 mol/dm cube. The unreacted nickel carbonate was filtered out and the filtrate evaporated to optain the crystals.

Under what condition is decompostion the fastest? Under what condition is it the slowest?