How many minutes does it take light from the sun to reach earth? (the distance from the sun to earth is 93 million mi; the speed of light is 2.99792458 x 10^8 m/s.)

If i initially have a gas at a pressure of 12 atm, a volume of 23 liters, and a temperature of 200 k, and then i raise the pressure to 14 atm and increase the temperature to 300 k, what is the new volume of the gas?

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

Which description best characterizes the motion of particles in a solid?