D)2.05 g N E) 2.34 g N 10. What is the mass of 0.304 moles of sucrose, C12H22011
ID: 543648 • Letter: D
Question
D)2.05 g N E) 2.34 g N 10. What is the mass of 0.304 moles of sucrose, C12H22011? A) 9.61 × 10-3 g B) 104 g C) 342 g D) 52.1 g E) 1.0x 102g 11. The mineral manganosite is a compound of 55Mn and i60. If 77% of the mass of manganosite is due to manganese, what is the empirical formula of manganosite? A) MnO B) Mn20 C) Mn202 D) Mn02 E) none of these 12. An unknown compound with a molar mass of 223.94 gmol consists of 32.18% C, 4.50% H, and 63.32% CL Find the molecular formula for the compound. A) CHCI B) C6HI0Cl4 C) C3H5Cl2 D) CoHisCl6Explanation / Answer
10.molar mass of C12H22O11 = 12*12+1*22+16*11 = 342g/mole
mass of C12H22O11 = no of moles * gram molar mass
= 0.304*342 = 104G
11.
element % A.Wt reltive number simple ratio
Mn 77 55 77/55 = 1.4 1.4/1.4 = 1
O 23 16 23/16 = 1.4 1.4/1.4 = 1
The empirical formula = MnO
A. MnO
12.
element % A.Wt relative number simple ratio simplest ratio
C 32.18 12 32.18/12 = 2.68 2.68/1.78 = 1.5 1.5*2 = 3
H 4.5 1 4.5/1 = 4.5 4.5/1.78 = 2.52 2.52*2 = 5
Cl 63.32 35.5 63.32/35.5= 1.78 1.78/1.78 =1 1*2 = 2
The empirical formula C3H5Cl2
c. C3H5Cl2 >>>>answer
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