2Fe(NH3)3 + 3Na2S-----> 6NaNH3 + Fe2S3
Mass is the physical property of matter can be expressed numerically in SI units.
<span>Phrenology is a pseudoscience, because it suggest that mental abilities of the people can be found by measuring person's skull.</span>
Most likely it’s crystalline structure, which makes it small granules that are soluble in water. Most, if not all, ionic compounds are salts. And salts dissolve in water.
Hope that’s correct