<span>I think the best answer
among the choices is the third option. The properties which make tungsten
useful in the thin, glowing filaments of light bulbs are it has a high melting
point and is electrically conductive. Its melting point is around 1650 degrees
Celsius. Of all metals, it is the highest and also it does not melt even though
it is glowing.</span>
Answer: 28.5 g
Explanation:
1 mole of every substance contains Avogadro's number of particles and weighs same as it's molecular weight.
Here 1 mole of 
contains 
molecules of and it weighs 
molecules weigh 44g
molecules weigh = 
= 28.5g
Sodium nitrate is the compound that contains both ionic and covalent bonds so the answer is (3) sodium nitrate :)))
i hope this be helpful
* marry Christmas *
N= m/v n=0.077/.200 = 0.385
