`19.098 xx 10^19` years
19.098 years
`19.098 xx 10^9` years
None of these.
`2N_A` ions of `Ca^(+2)` 4 Na ions of ` Cl^-`
`2N_A` ions of `Cl^-` & 4Na ions of `Ca^(+2)`
`1 N_A` ions of `Ca^(+2)` & 1 Na ions of `Cl^-`
None of these.
22.4 lit.
11.2 lit
33.6 lit
5.6 lit.