Đun 12 gam axit axetic với etanol dư (có H2SO4 đặc làm xúc tác) đến khi phản ứng đạt trạng thái cân bằng, thu được 13,2 gam este. Hiệu suất của phản ứng este hoá là

1) how many electrons are in each energy level of the following elements? a. he b. na c. na d. ne 2) how many valence electrons are percent in the following atoms? a. s b. mg c. be d. cl 3) which of the following elements are stable as atoms? a. he b. o c. cl d. ar if you are able to provide the work as to how you got the answers that would be greatly appreciated. : )

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5