A. Calculations for the Determination of Ammonium Chloride The data from the data entry portion of the report has been copied into this section of the report for your convenience. Use the data to make the necessary calculations. (1) Mass of evaporating dish on #1: 38.646
(2) Mass of evaporating dish and original sample (a): 39 591
(3) Mass of evaporating dish after subliming Nha (g) 39.4750
B. Calculations for the Determination of Sodium Chloride 14 Mass of evaporating dish #2: IS Mass of watch glass (a):
(1) Mass of evaporating dish #2 38700 g
(2) Mass of watch glass. 28 299 g
(3) Mass of evaporating dish #2, watch glass and NaCl(a): 67,355
C. Calculations for the Determination of Sand
Mass of evaporating dish #1: 38.645
Mass of evaporating dish and SiO2 (g) 39.405
D. Summary
Mass of original sample (0)
Experimental mass recovered (NH4Cl + NaCl + S107)
Differences in these weights (g) (use the absolute value of the difference)
recovery of matter
Select a reasonable explanation to account for the differences. There may be more than one possible reason that makes sense, just select one of them.
A. It is possible not all of the water was evaporated from the sand, causing the recovered mass to be higher.
B. It is possible not all of the water was evaporated from the sand, causing the recovered mass to be lower.
C. While drying the NaCl, the liquid bolled and some splattered out of the evaporating dish, causing the recovered mass to be lower.
D. While drying the Naci, the liquid boiled and some splattered out of the evaporating dish, causing the recovered mass to be higher.
E. There was no difference in recovered and original mass, so there is no difference to account for.

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.

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.