What do the colors produced by fireworks indicate? a. a physical change c. a state change b. a chemical change d. an element change

Dr. Alexander Winemann

In what situations are van der waals forces the most significant

Which gas in the Earth's atmosphere turns into precipitation? A) Oxygen B) Hydrogen C) Nitrogen D) water vapor

Which foods contain acids? Check all that apply: a.) limes b.) sourdough bread c.) water d.) sugar e.) honey f.) milk g.) lemons h.) tomatoes

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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?