Element A has its highest valency for O, which is 5/3 of its valency for H. In its compounds with O, O makes up 56.388% by mass. Find A

possibly, yes.

explanation:

the amount of sugar you take in is dangerously high, risk of heart disease, high risk of diabetes, and etc.

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.

14 days is the half-life of phosphorus-32

its first and third is your answer i did the qustion the fourth isnt right