After the first (main) earthquake, other smaller shocks may occur at times for: about a day
several hours
several weeks
almost a year

It's basically a smaller earthquake that happens after the main quake, in the same area. If it's stronger than the first quake, it's renamed as the main earthquake and the original main quake becomes known as a foreshock. Aftershocks can happen for up to two years after the original earthquake, losing power over time. So i'd say it's either between, Several weeks and a year.

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.