What mass of Ni(CO)4Ni(CO)4 is allowable in a laboratory that is 12 ftft ×× 21 ftft ××11 ftft ? Express your answer using two significant figures.

The answer to the question is

Only up to 1.45×10⁻³ grams of Ni(CO)₄ is allowable in the room

Explanation:

The allowable concentration of Ni(CO)₄ in a room is 1 ppb that is one part per billion, therefore

volume of gas in a room of 12 ft by 21 ft by 11 ft = 2772 ft³

From PV = nRT, n = (P×V)÷(R×T)

in SI units we have  at 1 atm or 101325 Pa, V = ‪78.49 m³   R 3.142 J/mol·K

n = 101325×78.49/(3.142×298.15) = 8489.65 moles

The room can contain 8489.65 moles of  Ni(CO)₄ However allowable concentration is 1 part per billion or

(8489.65/1000000000) moles = 8.49×10⁻⁶ moles

Molar mass of Ni(CO)₄ = 170.73 g/mol

Allowable mass of Ni(CO)₄ = Number of moles × molar mass

= 170.73 g/mol×8.49×10⁻⁶ moles = 1.45×10⁻³ grams

the correct answer would be d. hope this !

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).