What mass of sodium nitride is required to produce 13.8g of nitrogen?
2na3n n2 + 6na

81.79g

Explanation:

Equation of reaction

2Na3N -—> 6Na +N2

Molar mass of Na3N = 82.98

Molar mass of N2 = 28.00

From the equation of reaction,

(2*82.98)g of Na3N produces = 28g of N2

x g of Na3N will produce 13.8g of N2

x = 13.8 * 165.96 / 28

x = 81.79g of Na3N

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).