<span>Sir Frederick William Herschel did.</span>
Answer: 3.0 moles of water
are needed to react with a mole of 3.0 of Na
Explanation:
The balanced chemical reaction of sodium with water is as follows:

According to stoichiometry:
2 moles of sodium
reacts with = 2 moles of water 
Thus 3.0 moles of sodium
reacts with =
moles of water 
3.0 moles of water
are needed to react with a mole of 3.0 of Na
When radioactive decay occurs, the original nucleus splits into daughter nuclei and the resulting nucleus is more stable than the original nucleus. The nucleus can be of a different element than the original.
Unstable nuclei often undergo radioactive decay. In a radioactive decay, the unstable nucleus is broken up into other nuclei. Usually, the nuclei formed during radioactive decay are smaller in mass compared to the original nucleus.
Also, the resulting nucleus is more stable than the original nucleus. The nucleus can be of a different element than the original.
Answer:
D. ionic sodium phosphate (Na3PO4)
Explanation: