<span>Magnesium:
Mg molar mass: 24.3050
You have one atom of Mg so, <span>24.211% (mass percent)
</span></span><span>Silicon:
Si molar mass: 28.0855
You have one atom of Si so, <span>27.977% (mass percent)
</span></span><span>Oxygen:
O molar mass: 15.9994
You have three atoms so, <span>47.812% (mass percent)</span></span>
Answer:

Explanation:
Hello,
In this case, considering that the safe temperature may be computed via the ideal gas law as we now the pressure, mass and volume via the dimensions:

The pressure in atm is:

And the moles considering the mass and molar mass (66 g/mol) of dinitrogen difluoride (N₂F₂):

In sich a way, by applying the ideal gas equation, which is not the best assumption but could work as an approximation due to the high temperature, the temperature, with three significant figures, will be:

Best regards.
It is scandium or titanium iron chroniclemium vanadium manganese
The way to working out the numbers is to increase the measure of HNO3 required by the molarity to discover what number of moles you require: 0.115. You ought to have the capacity to make sense of the recipe weight H is 1, N is 14, O is 16. The result of the quantity of moles duplicated by the recipe weight ought to give an esteem in grams. You can utilize the thickness to change over to a volume of HNO3 to add to the right volume of water.
The answer to this question is A