How many oxygen atoms are present in 2.50 moles of oxygen atoms?

True or false, the three major scales used to measure earthquakes are mercalli scale, richter scale and magnitude scale

What is a scientific theory? a. a scientist's guess about how something works b. the results of an experiment obtained using the scientific method c. a proven fact that will never change d. an idea that is backed by data from many sources

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.