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:
i think the first one and thrid
Step-by-step explanation:
16 would be the range. The lowest value is 5, and the highest value is 21. You just subtract those two which gives you 16! (:
Answer:
c. 
Step-by-step explanation:
29.99 * 3 =89.97 89.97 with 30% off = 62.98 and 5% of 62.98 =3.15 so 62.98 + 3.15 = 66.13$
180.00 + 14.95 + 8.95 = 203.09 - 15% = 173.44 + 4% = 180.38
5.65 + 5% of 5.65 = 5.93
i think this is all right you might want to check my work!
