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Basaltic rocks contain approximately 45 to 52 percent silica. About how many kilograms of silica would you predict to be in a 92-kg boulder of basalt?

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bunnymarshmarloykw47
To find the answer, we can use the percentage above to find the amount of silica in 92kg of boulder of basalt.

If the Basalt is with 45 percent of silica:

92×45%
=41.4kg

If the Basalt is with 52 percent of silica:

92×52%
=47.84kg

We can then take the average to predict the amount of silica by using the lowest and highest approximation:

(41.4+47.84)÷2
=89.25÷2
=44.62kg

Therefore,the answer is 44.62kg.

Hope it helps!