Question

what is the mass of one mole of water.what is the valency of the carbon in CCI4 and CO2​

Answer 1

$\huge\color{cyan}\boxed{\colorbox{black}{✿Answer✿}}$

$\large\fbox\colorbox{lightgreen}{Mass\:of\:1\:mole\:of\: water} \implies$${\large{\boxed{\mathcal{\red{18.01528 g/mol}}}}}$

Valency of Carbon in CCl4 is +4. Because the valency of Cl is -1 and to nutralize (-1×4) = -4, the carbon atom is needed to be in +4 state.