C & B are switched so I'm not sure if that was a typo or not, but the answer is concentration!
The question is asking us to determine what gives the Amethyst its purplish color. Amethyst colors range from light to dark purple. The most highly regarded are the transparent deep purple colors. Amethyst ( chemical formula: Si O2 ) is the purple variety of the mineral Quartz.The pure Quartz is often colorless. Amethyst gets its purplish color because of the presence of Iron ( Fe ) and other impurities in the gem. Answer: C. Iron.<span /><span />
Answer:
Gas is sometimes measured in cubic feet at a temperature of 60 degrees Fahrenheit and an atmospheric pressure of 14.7 pounds per square inch. Gas production from wells is discussed in terms of thousands or millions of cubic feet (Mcf and MMcf). Resources and reserves are calculated in trillions of cubic feet (Tcf).
Answer:
1.15
Explanation:
2SO₂ + O₂ ⟶ 2SO₃; K =1.32
SO₂ + ½O₂ ⟶ SO₃; K₁ = ?
When you divide an equation by 2, you take the square root of its equilibrium constant.
K₁ = √1.32 = 1.15
The equilibrium constant is 1.15.
