mackaliyah mackaliyah

17-05-2022
Chemistry

contestada

A grain of sand weighs approximately 0.0102 grams. How many molecules of SiO2 are in a grain of sand? Assume that sand is 100% SiO2.

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d23rud61 d23rud61

17-05-2022

Answer:

0.5

Explanation:

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indrawboy indrawboy

17-05-2022

mol = mass : MM SiO₂

mol = 0.0102 : 60 g/mol = 0.00017

molecules = 0.00017 x 6.02 x 10²³ = 1.0234 x 10²⁰

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