-) In Utah's Arches National Park we can see many interesting shapes like this one. Many different things helped to shape this arch:
earthquakes, rivers, freezing water, and wind. Only one of these made the surface of the arch smooth and rounded. That was
A)
earthquakes.
B)
strong winds.
C)
water freezing in the cracks.
D)
a river running through the rocks.

What is the ph of a solution with a concentration of 5.2 × 10–8 m h3o+?

100 points answer quick the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Can someone me with questions 15 to 17 plz.