You traveled in the direction of east
<u>Answer:
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The study carried out by Dr. Xu is a randomized controlled study.
<u>Explanation:</u>
- For the sake of determination of how the results of the students change by doing certain changes to the examination pattern, Dr. Xu devised that the change is considerably evident.
- Dr. Xu provided and intervention in the process of exam in the form of guides which helped the students to score better later. Hence, from the standard of conduct of the study, it can be said to be a randomized controlled study.
Bases increase the concentration of hydronium ions by donating hydroxide ions to water molecules is False.
<u>Explanation:</u>
Bases are counterparts of acids. They take Hydronium protons from water, and increase the OH- I ions in the solution. One example for this could be ammonia.
When ammonia is added to a solution it accepts a proton of hydronium and becomes ammonium ion.
Solutions which posses’ higher concentrations of hydronium are called acidic solutions and those possessing lower concentrations of hydronium ions are basic in character. Also, pure water is neither acidic nor basic; therefore the concentration of hydronium ions in pure water is neutral.
So they can match data together, or confirm different findings with more opinions.
Answer:
one of the risks he took were asking the poor white kids to help him read and write. It indicates his courage by using those skills to be civil rights activist and tell the story about what slavery was like for Frederick Douglass.
