Answer: The two main factors that affect how viscous lava is are the mineral content of the lava and its temperature. Lava that contains more iron and magnesium, classifying it as basaltic or mafic, has a lower viscosity than lava that has more silicates and calcium, classifying that as rhyolitic or felsic. Additionally, lava at higher temperatures flows with less viscosity than lava at lower temperatures, especially when the temperature allows some of the minerals in the lava to crystallize.
Explanation: I hope this helps
5.78 x 10^-9
all you need to do is count the decimal places
