I can't say exactly how much silica a'a has but it generally has a low silica content. Does this help
A composite volcano has high silica because they are known to be explosive.
Silica is the newer agent used to make tire rubber, but Carbon Black is still used in the production of retread tires with very good results in improving mileage per tire. Carbon Black and silica are reinforcing agents mixed into the ingredients of tire base materials, such as natural and manufactured rubbers, to improve the characteristics of tires.
It depends on how much silica is in the magma. If there is low-silica in the magma then the volcano will erupt quietly. If there is high-silica in the magma then the volcano will erupt explosively.
The density of quartz is around 2.6, meaning that it weighs 2.6 times as much as an equal volume of water.
Silica gel will adsorb up to 40% of its own weight in moisture.
Less than 45%
How much Goodyear charges for a used tire depends on the type of tire being purchase and the city in which it is purchased.
use a tire gauge to measure that ,but it is not very much air if it's in a automobile tire.
The silica content will vary from one volcano to the next and will even vary over time for a single volcano. On average, though, composite volcanoes erupt intermediate rocks that are 52-63% silica.
Gem silica can range in price according to the quality/cut/color/origin of the material. Prime examples (cabochons) of high quality collectible gem silica can reach $50-200 / carat.
how much air is in the tire