Two gas-containers, A and B, are connected with a valve. The first container, A, has a volume of 135 mL, and the second container, B, has a volume of 117 mL. A sample of gas originally in container A is at 22.5 C and the pressure is 165 mmHg. What is the pressure (in mmHg) of the gas sample when the valve is opened and the gas now occupies both containers at a temperature of 12.7 C

Helium decays to form lithium. which equation correctly describes this decay?

What is happening when the water inside a kettle heats up and begins to boil

The image compares the arrangement of electrons in two different neutral atoms. a figure labeled atom q has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has six black spheres. to the left of this figure is another figure labeled atom p. atom p has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has seven black spheres. which of the following best explains the position of the two atoms in the periodic table?