Ile cząstek zawartych jest w 20 g CaO??
prosze o pomoc ;D
dam naj!
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Ile cząstek zawartych jest w 20 g CaO??
prosze o pomoc ;D
dam naj!
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mCaO=56u
56g CaO------6,02*10^23 cząst.
20g CaO---------x cząst.
x = 2,15*10^23 cząst.
MCaO=40g/mol+16g/mol=56g/mol
56g - 6,02*10²³ cz.
20g - x cz.
_____________________
x=20g*6,02*10²³cz.:56g=2,15*10²³cz.