An example of a chemical property of formaldehyde (CH20) is As a summer intern a

Question

An example of a chemical property of formaldehyde (CH20) is As a summer intern at the National Institute of Standards and Technology, a student performed three measurements to determine the density of water at 25degreeC to four significant figures. She obtained the following results. The known density of water at 25degreeC to three significant figures is 0.958 g/mL. Which one of the following is not a chemical change? Which one of the following is not a physical property? Who discovered electrons? What is the correct symbol for an electron? What is the correct symbol for a proton?

Explanation / Answer

1e, 2 almost accurate but not precisely same; 3d, 4c, 5a 6a 7d

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