Answer:
159.68
Step-by-step explanation:
68% of 499 is 339.32
499 -339.32=159.68
hope this helps
Answer:
172 g/mol
Step-by-step explanation:
CaSO4 . 2H2O
Atomic mass of
Ca = 40
S = 32
O = 16
H = 1
Molar mass = 40 + 32 + (16×4) + 2{(1×2)+16}
= 72 + 64 + 2(18)
= 136 + 36
= 172 g/mol
Answer:
its A
Step-by-step explanation:
The answer
5
Explanation
The shape is a pentagon