Chất nào dưới đây không phải là este?
A. HCOOC6H5 B. HCOOCH3 C. CH3COOH D. CH3COOCH3

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth

Reactions in cells take place at about a. 40°c b. 0° c. 100°c d. 60°c