Question

solve this questions​

Answer 1

Answer:

a) 72.264x10*23

b)120.44x10*23

c)132.484 X10*23

Answer 2

Answer:

A—molar mass of O² = 2x16= 32g

number of molecules in12g O²= given mass/ molar mass = 12/32= 0.375molecules

B— Molar mass H² O= 2x1+16=18g

number ofmoles in 20g H²O= 20/18 = 1.11 molecules

C—Molar mass of CO² = 12+16x2= 12+32 = 44g

number of moles in22g CO²=22/44 =0.5 molecules

Explanation:

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