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Sagot :
Explanation:
We are given: mass of beaker with sand/salt mixture = 68.596g
: mass of beaker only = 65.246g
: mass of sand + filter paper = 2.784g
: mass of filter paper only = 1.090g
: mass of salt + evaporating dish = 100.587g
: mass of evaporating dish only = 98.867g
Therefore:
mass of sand/salt mixture = mass of beaker with sand/salt mixture - mass of beaker only
= 68.596 - 65.246
= 3.35g
mass of sand recovered = mass of sand + filter paper - mass of filter paper only
= 2.784 - 1.090
= 1.694g
mass of salt recovered = mass of salt + evaporating dish - mass of evaporating dish only
= 100.587 - 98.867
= 1.72g
total percent recovery = (mass of sand recovered + mass of salt recovered)/mass of sand/salt mixture
= (1.72+1.694)/3.35
= 3.414/3.35
= 1.019 × 100
= 101.91%
Answer:
total percent recovery = 101.91%
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