D_Intro_Chem/Kit4603_V3/1C_4603_L17 _Molar_Mass/story html5.html New Window Assignments Help
Labs
Lab Drill 1 of 5
Bures &
Fundamentally, Avogadro's number is an expression of:
(check all that apply)
The number of particles in the molar volume of an ideal gas.
The number of particles of a substance in a sample containing its molar mass in
grams.
The electron charge to mass ratio.
The energy to accelerate an electron through a potential of one volt.

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

listen, you cant how young you were.

"you didn't chose the stud life. the stud life chose you."

answer carbon and three oxygen atoms;

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally