The correct option is A.
In scientific investigation, variable refers to those parameters that are manipulated or changed in an experiment. Variables are those factors or conditions that can exist in different amounts in a scientific investigation. There are three major types of experimental variables, these are, independent, dependent and controlled variables. All the variables that are used in an experiment are usually connected to one another, scientific investigators typically look for the relationships among the variables in order to depict how they associate with one another.
Iv: the red and blue kryptonite
Oil water corn syrup and honey
Answer:
N2 = 2 atoms.
2H2 = 4 atoms.
NH3 = 4 atoms.
Also: this is an uneven chemical equation, make sure there are the same amount of atoms on each side (in total).
Answer: V1 = 45.6 ml
Explanation:
This is a dilution process whereby the concentration of phosphate in the solution is being reduced from 4.5m to 2m. Meanwhile. In a concentration process, the concentration of the phosphate solution will be increased. It can be achieved by removing solvents.
The dilution equation will be used. The equation is as follows:
M1V1 = M2V2 where
V1 = Initial volume of phosphate solution.
M1 = Initial concentration of phosphate solution.
V2 =Final volume of phosphate solution.
M2 = Final concentration of phosphate solution .
From the information given,
M1 = 4.5
V1 = ?
M2 = 2.0
V2 = 80
4.5 × V1 = 2×80
4.5V1 = 160
V1 = 160/4.5
= 35.6 ml
