EDTA is a complex used to determine water hardness. The reaction between EDTA and CaCO₃ is in 1:1 ratio. To solve this problem, we must know the moles of CaCO₃ present (otherwise we can't solve the problem). Suppose you have 0.5 moles of CaCO₃. Since the ratio is 1:1, it would also need 0.5 moles EDTA. Then,
Volume = Moles/Molarity = 0.5 moles/0.05 M = 10 L of EDTA
The correct answer is - A- Amount of nitrogen in fertilizer.
The independent variable, in mathematical terms, is the variable whose variation is not dependent on the variations of the another variables.
In this case, the independent variable will be the amount of nitrogen in the fertilizer, as it is not dependent on any other variable. Also, apart from not being dependent on other variables, it is a variable on which the other variables are dependent, which in this case will be the amount of leaves and the amount of blossoms on the tomato plant.
<span>The dependent variable is that which will respond to changes in the independent variable, which has been manipulated during the experiment. By doing so, this can lead to an understanding of whether or not the changes involved have a significant linkage or if they are due to some other factors.</span>
Answer:
respiratory, digestive and circulatory system
Explanation:
the respiratory system brings oxygen into the lungs when you breathe. the digestive system breaks food down into nutrients such as glucose. the circulatory system transports glucose and other nutrients from the digestive system to the cells.
Answer:
Reduction
Explanation:
The oxidation reduction reactions are called redox reaction. These reactions are take place by gaining or losing the electrons and oxidation state of elements are changed.
Oxidation:
Oxidation involve the removal of electrons and oxidation state of atom of an element is increased.
Reduction:
Reduction involve the gain of electron and oxidation number is decreased.
In given reaction fluorine gas gain two electron and form fluoride ions.
F₂(g) + 2e⁻ → 2F⁻(aq)
The given reaction is reduction because oxidation state is decreased from zero to -1.
