What is the pH of a solution with a 7.8 × 10−13 M hydronium ion concentration? (5 points) 1.9

2.8

11

12

Take a look at this dandelion. the yellow flower on the right is pollinated and the seeds on the left are transported by

How much carbon is stored in the atmosphere as co2

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.