Answer:
x= 138.24 g
Explanation:
We use the avogradro's number
6.023 x 10^23 molecules -> 1 mol C2H8
26.02 x 10^23 molecules -> x
x= (26.02 x 10^23 molecules * 1 mol C2H8 )/6.023 x 10^23 molecules
x= 4.32 mol C2H8
1 mol C2H8 -> 32 g
4.32 mol C2H8 -> x
x= (4.32 mol C2H8 * 32 g)/ 1 mol C2H8
x= 138.24 g
Atomic mass Nickel ( Ni) = 58.69 a.m.u
1 mole ------------- 58.69 g
2.63 moles -------- ??
2.63 x 58.69 / 1 => 154.3547 g
1 g ------------- 1000 mg
154.3547 g ---- ??
154.3547 x 1000 / 1
=> 154,354.7 mg
Answer:
Determine the mass of substance and it's molar mass. Divide the given mass by it's molar mass to get moles and multiply time
6.002*1023 molecules 1mole
Answer:
the abbreviation form of full name is called symbol.
the smallest unit of cimpound is called molecule.
= 24.3
The average atomic mass of X is the <em>weighted average</em> of the atomic masses of its isotopes.
We multiply the atomic mass of each isotope by a number representing its <em>relative importance</em> (i.e., its % abundance).
Thus,
0.790 × 24 u = 18.96 u
0.100 × 25 u = 2.50 u
0.110 × 26 u = <u>2.86 u</u>
TOTAL = 24.3 u
∴ The relative atomic mass of X is 24.3.
