42 There is 18.44% sulfur and 81.56% chlorine by mass in a Scla4 molecule. What is the mass of sulfur in a 10.0 gram sample of SCI4?​

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Water undergoes a large change in density at 0 ∘ c as it freezes to form ice. calculate the percent change in density that occurs when liquid water freezes to ice at 0 ∘ c given that

Awhite powder is added to a solution. the images show observations made before the powder is added, just after the powder has been added, and a little while later. (the liquid in the small beaker is phenol red solution.) what evidence shows that a chemical change has taken place?