Answer:
14.4g
Explanation:
First, we need to write a balanced equation for the reaction between Fe and O2 to produce Fe2O3. This is illustrated below:
4Fe + 3O2 —> 2Fe2O3
From the balanced equation,
4moles of Fe produced 2moles of Fe2O3.
Therefore, 0.18mol of Fe will produce = (0.18x2) /4 = 0.09mol of Fe2O3.
Now we need to find the mass present in 0.09mol of Fe2O3. This can be achieved by doing the following:
Molar Mass of Fe2O3 = (56x2) + (16x3) = 112 + 48 = 160g/mol
Number of mole of Fe2O3 = 0.09mol
Number of mole = Mass /Molar Mass
Mass = number of mole x molar Mass
Mass of Fe2O3 = 0.09 x 160 = 14.4g
An integral membrane protein is a type of membrane protein that is permanently attached to the biological membrane.
This problem is asking for the dissolution reaction of barium fluoride, both the equilibrium and Ksp expressions in terms of concentrations and x and its molar solubility in water. Thus, answers shown below:
<h3>Solubility product</h3>
In chemistry, when a solid is dissolved in water, one must take into account the fact that not necessarily its 100 % will be able to break into ions and thus undergo dissolution.
In such a way, and specially for sparingly soluble solids, one ought to write the dissolution reaction at equilibrium as shown below for the given barium fluoride:

Next, we can write its equilibrium expression according to the law of mass action, which also demands us to omit any solid and refer it to the solubility product constant (Ksp):
![Ksp=[Ba^{2+}][F^-]^2](https://tex.z-dn.net/?f=Ksp%3D%5BBa%5E%7B2%2B%7D%5D%5BF%5E-%5D%5E2)
Afterwards, one can insert the reaction extent, x, as it stands for the molar solubility of this solid in water, taking into account the coefficients balancing the reaction:

Finally, we solve for the x as the molar solubility of barium fluoride as shown below:
![2.5x10^{-5}=(x)(2x)^2\\\\2.5x10^{-5}=4x^3\\\\x=\sqrt[3]{\frac{2.5x10^{-5}}{4} } \\\\x=0.0184M](https://tex.z-dn.net/?f=2.5x10%5E%7B-5%7D%3D%28x%29%282x%29%5E2%5C%5C%5C%5C2.5x10%5E%7B-5%7D%3D4x%5E3%5C%5C%5C%5Cx%3D%5Csqrt%5B3%5D%7B%5Cfrac%7B2.5x10%5E%7B-5%7D%7D%7B4%7D%20%7D%20%5C%5C%5C%5Cx%3D0.0184M)
Learn more about chemical equilibrium: brainly.com/question/26453983
I think the best answer among the choices given is option A. The reactions are all decomposition reactions because decomposition reactions can produce either a precipitate, a gas and a water in a single reaction. However, these products can also be produced by other type of reactions.