Answer:
c. a small amount
Explanation:
Trace elements (or trace metals) are minerals present in living tissues in small amounts.
Answer: 71.43g
Explanation: The RMM of NaHCO3 is
23+1+12+16(3)=84.
There is one carbon in NaHCO3 thus there are 1×12g of C in NaHCO3.
Thus
85gNaHCO3-----12g C
500gNaHCO3---- xgram
(500×12)÷84= 71.43
Max of eight electrons in the 2nd level
d is ur answer in my opinion