Although it's true that MgO is only very slightly soluble in water, you can consider the mixture a conventional solution for the purposes of this question. The % mass is the mass of MgO divided by the mass of the entire solution:
45.8 / (45.8 + 205) * 100 = <span>18.3%</span>
You need to whithe the grams first
On a warm summer day, my stomach started to growl i suddenly went to go eat noodles in my kitchen the convention currents were radiated back into my house so i can feel the heat. The noodles hot currents radiated heat to the spoon which was conducted to the cold spoon and into my mouth! Boy those noodles where so good.
From n=3 to n=1
<span>according to extension of the Wavelength in electron transition from n=3 to n=1 </span>