Scientists sometimes use chemical reactions to reclaim metals from solutions. They do this to reduce toxic waste. Does this mean that the metal has disappeared? Explain your answer.

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

How does a sample of helium at 15 degree celsius compare to a sample of helium at 215 k? a) the helium at 15 degrees celsius has a higher average kinetic energy that the sample at 215 k. b) the helium at 15 degrees celsius has lower nuclear energy that the sample at 215 k. c) the helium at 15 degrees celsius has slower- moving atoms that the sample at 215 k. d) the helium at 15 degrees celsius has smaller atoms than the sample at 215 k.