QM1500 001 3/2021 Question 5
Jeffrey left of bas estate to his wife and
of the remainder to his granddaughter. The part of his state
that is not accounted for oven as a fraction,​

Look i don’t know the answer to this but someone else will so just wait a little bit longer

Planet earth has a mass of 5.9726x10²⁴ kg.then: 5.9726x10²⁴ kg=100% of the total earth mass.if the water´s mass=5x10-4 % of the total mass, we can solve this problem by the rule of three.5.9726x10²⁴ %*10⁻⁴ %x=(5.9726x10²³ kg)(5*10⁻⁴  %) / 100 %=2.9863x10¹⁹ kganswer:   the mass of the planet´s water would be   2.9863 x 10¹⁹ kg.

Element a has no reactivity because it has eight valence electrons and cannot gain anymore electron and it wouldn't lose any either