What is common of volcanoes that have the most violent eruptions?

A. They feature magma with very high silica content.

B. They are shield volcanoes.

C. They feature magma with low viscosity.

D. They have no magma, but have much lava.

Acompound has a molecular weight of 12.124 atomic mass units and the empirical formula c3h40. what is the molecular formula of the compound?

Which of the following units is not an official si unit? mole liter kilogram ampere

With the largest atoms and the smallest number of valence electrons and with the smallest atoms and the greatest number of valence electrons are the most reactive. a. nonmetals; metals b. nonmetals; transition elements c. transition elements; metals d. metals; nonmetals