A variable, which is controlled or changed in a scientific experiment to examine the influences on the dependent variable is known as an independent variable. On the other hand, a dependent variable refers to the variable, which is being measured and tested in a scientific experiment.
In the given case, one is observing that how the amount of salt in a mouse food influences the water the mouse drinks. Thus, the amount of salt in the food in the given case is an independent variable, as one can determine the amount of water consumed by the mouse, by manipulating the amount of salt intake given to the mouse.
Hence, the correct answer is option B.
The molecular compound in the given statement is CH₆N₂.
<h3>What defines a molecular compound?</h3>
Chemical compositions of molecules that make up molecular compounds reflect the number of elements that are really bound together within the molecule. Due to the sides and angles of a atoms' links to one another, the complex has a certain structure.
<h3>Briefing:</h3>
Consider 140.22 g/mol of compound
Carbon = 140.22 * 51.38/100
Carbon = 72 gm = 1 mol
Hydrogen = 140.22 * 8.64/100
Hydrogen = 12 gm = 6 mol
Nitrogen = 140.22 * 39.97/100
Nitrogen = 56 gm = 2 mol
The molecular compound is CH₆N₂.
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The complete question is -
A compound with molar mass 140.22g/mol is known to contain 51.38% carbon, 8.64% hydrogen and 39.97% nitrogen. Find the molecular of this compound.
Answer is: Volume of hydrogen sulfide is 131,37 L.
m(H₂S) = 200,0 g.
n(H₂S) = m(H₂S) ÷ M(H₂S).
n(H₂S) = 200 g ÷ 34,1 g/mol.
n(H₂S) = 5,865 mol.
V(H₂S) = n(H₂S) · Vm.
V(H₂S) = 5,865 mol · 22,4 L/mol.
V(H₂S) = 131,37 L = 131,37 dm³.
n - amount of substance.
Vm - molar volume.
1. alizarin yellow R, color change at pH 10-12
2. thymol blue, color change at pH 2-4
3. methyl red, color change at pH 3-5
4. phenolphthalein, color change at pH 8-10
<span>5. bromothymol blue, color change at pH 6-8
These are the list of indicators that we have to choose from them and the correct answer will be 5) Bromothymol blue, due to color change at pH 6-8
Due to both HI is strong acid and Ba(OH)</span>₂ is strong base so the formed salt BaI₂ will has pH = 7 and the equivalence point will be 7 so it will be in the effective range of Bromothymol blue