Answer:
Dependent and independent variables are variables in mathematical modeling, statistical modeling and experimental sciences. Dependent variables receive this name because, in an experiment, their values are studied under the supposition or hypothesis that they depend, by some law or rule (e.g., by a mathematical function), on the values of other variables. Independent variables, in turn, are not seen as depending on any other variable in the scope of the experiment in question; thus, even if the existing dependency is invertible (e.g., by finding the inverse function when it exists), the nomenclature is kept if the inverse dependency is not the object of study in the experiment. In this sense, some common independent variables are time, space, density, mass, fluid flow rate[1][2], and previous values of some observed value of interest (e.g. human population size) to predict future values (the dependent variable)[3].
Of the two, it is always the dependent variable whose variation is being studied, by altering inputs, also known as regressors in a statistical context. In an experiment, any variable that the experimenter manipulates[clarification needed] can be called an independent variable. Models and experiments test the effects that the independent variables have on the dependent variables. Sometimes, even if their influence is not of direct interest, independent variables may be included for other reasons, such as to account for their potential confounding effect.
Explanation:
Answer : The mass of oxygen consumed in the reaction is 14.6 grams.
Explanation :
First we have to calculate the change in moles of oxygen.
Formula used :
or,
where,
w = work done = 850.1 J
= change in moles of gas = ?
R = gas constant = 8.314 J/mol.K
T = temperature = 675 K
Now put all the given values in the above formula, we get:
Now we have to calculate the mass of oxygen consumed.
The balanced chemical reaction is,
Here, the volume changes of solids can be ignored.
From the balanced chemical reaction, we conclude that
The number of moles oxygen required for the complete reaction = 3
Change in mole of oxygen = 0.152 mol
Molar mass of 
= 32 g/mol
So,
The mass of oxygen consumed = 3 x 0.152 mol x 32 g/mol = 14.6 g
Therefore, the mass of oxygen consumed in the reaction is 14.6 grams.
Mass of iron chloride (FeCl₂) : 22.68 g
<h3>Further explanation</h3>
Proust stated the Comparative Law that compounds are formed from elements with the same Mass Comparison so that the compound has a fixed composition of elements
In the same compound, although from different sources and formed by different processes, it will still have the same composition/comparison
With this law, we can calculate how many grams an element is needed to make a compound with a certain mass, as desired
<h3 />
The iron ions in 50 g mixture :
Answer:
D
Explanation:
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