The compound a2o is 63.7% a (mystery element) and 36.3% oxygen. what is the identity of element a?

Nitrogen,N

We are given;

We are required to identify A

Atomic mass of O is 16.00 g

Therefore, mass of Oxygen in the compound is 16.00 g

16.00 g = 36.3 %

Thus, mass of A = (16.00 × 63.7%) ÷ 36.3%

                          = 28.077 g

But there are two atoms of A in the compound

Therefore, Atomic mass of A = 28.077 g ÷ 2

                                                = 14.039 g

                                                = 14.0 g

Thus, the identity of element A is nitrogen, because its atomic number is 14.0067 which is approximately 14.0 g

Hence, identity of element A is Nitrogen (N)

yes, water is wet, just as it makes other things wet, it is wet itself, kinda like ice, when ice is in water, the ice makes water cold, and ice is cold, therefore with that example, water is wet

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.