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Lelechka [254]
3 years ago
7

A sample of beach sand contains sand particles of different colors, small pebbles, and also shells. each component contains diff

erent metals and minerals. the pebbles and shells can easily be separated from the sand. which term or terms could be used to describe this sample of sand
Chemistry
1 answer:
JulijaS [17]3 years ago
5 0
Answer is: this sample of sand is heterogeneous mixture.
Heterogeneous mixture is not uniform in composition (in this mixture different metals and minerals), but proportions of its components (in this mixture particles of different colors, small pebbles) vary throughout the sample.
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What mass of zinc oxide would be produced by the thermal decomposition of 375 grams of zinc carbonate?
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Zinc carbonate has the chemical formula : ZnCO3 and the equation for thermal decomposition is:
ZnCO3 .................> ZnO + CO2
1 mole of ZnCO3 produces one mole of ZnO

From the periodic table:
molar mass of zinc = 65.38 gm
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molar mass of ZnCO3 = 65.38 + 12 + 3(16) = 125.38 gm
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