Answer:
Modern chemistry describes the composition, structure, and physical and chemical properties of substances. ... The main aim of modern chemistry is to improve the communication and conversation among the scientists, researchers, engineers, and policymakers, who are working under the area of modern chemistry
Explanation:
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Answer:
Aluminum chromate, a yellow precipitate.
Explanation:

Can you provide a picture of the dropping liquid, please?
Explanation:
A chemical reaction is defined as the reaction which leads to change in chemical composition of the reactants due to which there occurs formation of a new compound.
For example, when Ethan heats a substance and observes that the substance turns from a brown solid to a black powder then it means heating has lead to a chemical change in the brown solid because of which it has turned into a black powder.
Whereas if there occurs no change in chemical composition of the reactants then we can say that a physical change has occurred.
For example, change in shape, size, mass etc of a substance are all physical changes.
Hence, we can conclude that Ethan best defend his conclusion as a chemical change.
Answer:
(0.085 cm) + (0.062 cm) + (0.14 cm) =
0.287 centimeters