Answer:
the answer to this question is b
A physical change means that none of the atoms or chemical bonds have been changed inside of something. Therefore, if you make a physical change, you should be able to revert it back. That means that the answer to this question is "The changed substance retains its unique properties." because it is the only answer choice where nothing major is being changed. The rest of the answer choices indicate that once changed, it isn't able to be changed back.
Answer:
the conclusions that can be drawn are-
a. one of the culture media must have lacked nutrients that are needed for that bacteria to grow.
b. the bacteria culture that failed to grow must have not inoculated properly.
c. the temperature of the culture must have been varied rapidly during the experiment.
d. mostly all of the culture media were capable of culturing the bacteria. this media can be used in further experiments.
Answer:
a Citric acid is added to the solution, but the pH of the solution does
not change.
Explanation:
<span>The blood of all humans is red based on its organic chemistry</span>
