Mole ConceptHard
Question
Assume that sodium atoms are spheres of radius 0.2 nm and that they are lined up side by side. How many miles, in length, is the line of atoms present in a 1.15 mg sample of sodium? (NA = 6 × 1023)
Options
A.1.2 × 1010
B.1.2 × 108
C.7.5 × 108
D.7.5 × 106
Solution
Number of Na-atoms =$\frac{1.15 \times 10^{- 3}}{23} \times 6 \times 10^{23} = 3 \times 10^{19}$
∴ Length of Na-atoms = $3 \times 10^{19} \times \left( 2 \times 0.2 \times 10^{- 9} \right) \times \frac{1}{1600} = 7.5 \times 10^{6}\text{ miles}$
Create a free account to view solution
View Solution FreeMore Mole Concept Questions
An ore contains 2.296% of the mineral argentite, Ag2S, by mass. How many grams of this ore would have to be processed in...A mixture of N2 and H2 is caused to react in a closed container to form NH3. The reaction ceases before either reactant ...Minimum amount of Ag2CO3 (s) required to produce sufficient oxygen for the complete combustion of C2H2 which produces 11...The empirical formula of compound is CH2O. 0.084 moles of the compound contains 1.0 g of hydrogen. Moleculoar formula of...When hydrocarbons are burnt completely in excess of oxygen gas, then...