What is the concentration of a solution (in parts per million) if 15 mg KNO3 are dissolved in water to make a total solution mass of 5.0 kg? A. 30 ppm of KNO3
B. 20 ppm of KNO3
C. 10 ppm of KNO3
D. 3 ppm of KNO3

How is energy related to the change of state represented by the model? atoms gain energy as a solid changes to a liquid. atoms gain energy as a solid changes to a gas. atoms lose energy as a solid changes to a liquid. atoms lose energy as a solid changes to a gas.

What properties would have caused early researchers to name hydrogen "inflammable air”

If a computer chip switches off -on-off in 0.015 us, what is the switching time in nanoseconds?