Answer:
A
Explanation:
Considering question A
Mass of original sample is
Mass of NH4Cl is
Percent of NH4Cl is
B
Mass of NaCl
C
Mass of SiO2
D
Mass of original sample
Differences in these weights (g) (use the absolute value of the difference)
recovery of matter
The correct option is C
From the question we are told that
The mass of evaporating dish on #1 is
The mass of evaporating dish and original sample
The mass of evaporating dish after subliming is
Generally the mass of the original sample is mathematically represented as
=>
=>
Generally the mass of is mathematically represented as
=>
=>
The Percent
=>
=>
Considering question B
The mass of evaporating dish #2 is
The mass of watch glass is
The mass of evaporating dish #2, watch glass and NaCl
Generally the mass of NaCl is
=>
=>
Considering question C
The mass of evaporating dish is
The mass of evaporating dish and SiO2
Generally the mass of SiO2 is mathematically represented as
=>
Considering D
The mass of the original sample is
Generally the experimental mass recovered (NH_4Cl,NaCl, SiO2 ) is mathematically evaluated as
Generally the differences in these weights (g) of recovery of matter is mathematically represented as.
=>
While drying the NaCl, the liquid boiled and some splattered out of the evaporating dish, causing the recovered mass to be lower.