Answer:
126.5g
Explanation:
n=<u>m</u><u> </u>
M
where n is moles
m is mass of substance
M is molar mass
molar mass of sodium is 23g/mol
m=nM
m=5.5(23)
m=126.5
c
b and d are out, the variables are changed. a would be a repetition, not a replication. c uses the same method and variables with a different control group
B on both questions
Answer: Al2 (SO4)3 + H2
option C
