Answer:
183.84 u
Explanation:
W (also known as "Tungsten") atomic number is 74 and atomic mass is 183.84 u
the answer is Te because O is oxygen.
Metals tend to become cations becauase they lose electrons
Answer : The correct option is, 13.7 mole
Solution : Given,
Moles of
= 27.4 moles
The given balanced chemical reaction is,

From the balanced chemical reaction, we conclude that
As, 2 moles of
react with 1 moles of 
So, 27.4 moles of
react with
moles of 
Therefore, the number of moles of oxygen
required are, 13.7 moles
Yes, and no. We all should know by know we do need the sun to survive, but we also need for energy is oxygen and the food we eat.