Percentage composition of a compound is a ratio of an amount of each element to the total amount of individual elements in a compound, which is then multiplied with 100.
Weathering definition= <span>wear away or change the appearance or texture of (something) by long exposure to the air.
Erosion definition= </span><span>the process of eroding or being eroded by wind, water, or other natural agents.
Deposition definition= </span>the action of deposing someone, especially a monarch.
these definitions are out of my textbook but in my own words.
Before............................
Answer:
Fe 3+
Explanation:
iron is Fe and it's 3 and has positive
When carrying out experiment in the laboratory to investigate physical changes, absolute measurement is usually not needed. For instance, one can just take a little sample of sodium chloride and dissolve it in water to demonstrate physical change. But for other experiments, such as the measurement of the catalase enzyme activity in a liver tissue. Careful measurements have to be made when preparing the chemicals that will be used in the experiment.
