Determine the mass of 1 mole of each of the follwoing 1- sucrose, C12H22O11 2-C1

ID: 855485 • Letter: D

Question

Determine the mass of 1 mole of each of the follwoing

1- sucrose, C12H22O11

2-C10H14N2 (nicotine)

3-CO(NH2)2 (urea)

q2/ How many silver atoms are present in a piece of silver jewelry weighing 27.5 gm?

q3/ how many moles of carbon are there in adiamond weighing 2.55 gram?

q4/a- a compound is found to contain 85.6% carbon and 14.4% hydrogen. what is the empirical formula for the compound?

b- the empirical formula of a compound is C2H3, its formula mass is 54 what is the molecular formula for the compound?

1) 342

2) 162

3) 60

q2) 108 grams contain Na

27.5 gms will contain 1.53 X 10^23 atoms

q3) 12 g contains Na

2.55 g will contain 1.27 X 10^23

q4) a) C - 85.6 %

H - 14.4 %

C - 85.6/12 = 7.133/7.33 = 1

H - 14.4 / 1 = 14.4/733 = 2

empirical formula - CH2

b) molecular mass = 54

empirical mass = 27

n = 54/27 = 2

molecular formula C4H6

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.