Answer:
A) Molecular weight
B) Rate of diffusion
C) Agar plates
Time of diffusion
Explanation:
A) The independent variable is the molecular weight because it is the variable that the researcher changes at will to aid his research. It doesn't depend on other variables.
B) The dependent variable is "Rate of diffusion because it depends on the molecular weight of the compound.
C) A control variable is one that would be held constant throughout the research.
In this case, the agar plates and the time of 2 hours diffusion remain the same throughout.
The strength of an acid is based on the hydrogen ions it forms.
The pool being cooler at the deep end. Also the air closer to the roof of a house being cooler.
Hey :)
I’m sure it’s 7
Because the mass number of any element is the number of protons and neutrons
Hope this helps :)
Acids are substances capable of donating hydrogen ion H⁺. On left h2po4- is acid, because that ion donate one hydogen ion to haso42-, and on the right h2aso4- is acid, because donate one H⁺ to hpo42- (when hpo42- accept one hydrogen ion, he transorms in h2po4-).