Solve and whoever get it right first gets brainlest Breanna is investigating the changes in various solids as they are heated. She places four unknown solids into individual test tubes and heats them at the same rated. She records her observations after 0, 10 and 20 mins.

Classify this reaction: 2al+n2-> aln.

What is the most important factor in determining climates.

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.