09-Cho dung dịch lỏng FeC có 4,3%C, vẽ giản đồ, xác định lượng hai pha rắn Austenit và Cementit khi làm nguội dung dịch lỏng trên xuống 1138oC

If a planet rotates 360 degrees during a 24 hour time period, what does that tell us about the planet? a. the middle of the planet is in darkness b. the seasons on the planet vary every day. c. the planet runs on a 12-hour time clock. d. the temperature on the planet varies daily.

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution

Nuclear decay is the spontaneous decay of one element into a. an x-ray b. a ray of light c. another element